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Photodiode Power Sensors (C-Series)


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Photodiode Power Sensors (C-Series)

Features

  • Fast Response Time and High Resolution
  • C-Series Connector Design for Quick Sensor Connection
  • Overtemp-Alert Sensor (Except S130 Series and S170C Microscope Slide Sensor)
  • Individually Calibrated with NIST- and PTB-Traceable Certificate of Calibration Plus Embedded Calibration Curve and Sensor Settings

Thorlabs' C-Series Photodiode Power Meter Sensors cover a wide power and wavelength range. These sensors are offered in standard, slim, microscope slide, integrating sphere, and compact fiber versions to meet your specific application requirements. They are the best sensor choice when a fast response time or high resolution is required and there is not a need for a flat spectral response.

These photodiode power meter sensors feature enhanced shielding to avoid electromagnetic interference as well as an over-temperature alert sensor to warn against damage and measurement errors due to overheating of the sensor (except the S130C Series Slim Sensors and the S170C Microscope Slide Sensor). For all sensors (except the S130C Slim Sensors and the S170C Miscroscope Slide Sensor), a set of fiber adapters is available to connect them to standard optical fiber patch cords (see below). Other fiber adapter types are available upon request.

The sensors have 8-32 or M4 mounting holes for mounting to 1/2" Posts. Posts and post holders are not included and sold separately.

Compatibility
The Photodiode Sensors presented here are compatible with C-Series power meter consoles including the the PM200, PM100D, PM100A, PM320E, and PM100USB (see the Power Meter Compatibility Chart). The S150C Series Fiber Sensors are integrated into the connector itself and directly plugged into the console.

Calibration
Each sensor head is individually calibrated and is shipped with a NIST and PTB Traceable Calibration Certificate. The calibration and identification data is stored in the connector of the sensor and is downloaded automatically to the connected power meter console.

Thorlabs offers specific recalibration services for all our photodiode power sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. Please contact our tech support team for recalibration information and pricing. We also offer expedited sensor calibration.

Sensor Upgrade Service
All C-Series Sensors are incompatible with old power meter consoles with non-C-Series connectors. We offer a sensor upgrade service if you want to use your existing sensors with a new power meter console with C-Series connector. Note: upgraded sensors will be incompatible with old power meter consoles with non-C-Series connectors. Please contact our tech support team for details.

Photodiode Sensor Selection Guide
Housing TypeStandardSlimMicroscope SlideIntegrating SphereFiber Coupled
Power Range 50 nW - 500 mW500 pW - 500 mW10 nW - 150 mW1 µW - 20 W100 pW - 20 mW
Wavelength Range200 - 1800 nm200 - 1800 nm350 - 1100 nm350 - 1700 nm350 - 1700 nm
Typical ApplicationGeneral MeasurementTight PlacesMicroscope Alignment and CalibrationIncoherent or Divergent BeamsFiber
Fiber Adapters AvailableYesYesNoYesYes

Standard Photodiode Sensors: S120C Series

Item #S120CS120VCS121CS122C
Technical Specs
Detector TypeSilicon PhotodiodeSilicon Photodiode (UV Extended)Silicon PhotodiodeGermanium Photodide
Wavelength Range400 nm - 1100 nm200 nm - 1100 nm400 nm - 1100 nm700 nm - 1800 nm
Optical Power Range50 nW - 50 mW50 nW - 50 mW500 nW - 500 mW50 nW - 40 mW
Max Average Power Density20 W/cm²10 W/cm²
Max Pulse Energy20 µJ
Linearity±0.5%
Resolutiona1 nW1 nW10 nW2 nW
Measurement Uncertaintyb±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±5%
General Information
Typical ApplicationLow Power Lasers
Laser TypesDiode, Diode Arrays, He-Ne, Dye, Ion Lasers (Ar+, Kr+)
Coating / DiffuserReflective ND (OD1)cReflective ND (OD1.5)dReflective ND (OD2)eAbsorptive ND (Schott NG9)
CoolingConvection
Head Temperature MeasurementNTC Thermistor 4.7 kΩ
Console CompatibilityPM200, PM100D, PM100A, PM320E, and PM100USB
Response Time<1 µs
Mechanical Specs
Sensor DimensionsØ30.5 mm x 12.7 mm
Active Sensor Area9.7 mm x 9.7 mm
Sensor ApertureØ9.5 mm
Distance to ND Filter0.10" (2.6 mm)
Distance to Detector0.23" (5.9 mm)
Cable Length1.5 m
ConnectorSub-D 9-pin male
Weight0.07 kg
Mounting and Accessories
Postc8-32 and M4 Taps
Cage System MountingN/A
Aperture ThreadExternal SM1 (1.035"-40)
Fiber Adapters (Optional)FC, SMA, SC, LC, ST
Viewing TargetVIS/IRUVVIS/IRVIS/IR
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm.
  • For the S120C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an absorptive ND diffuser (Schott NG3). Additionally, they came with an 8-32 tap and M4 adpater. For additional information, please contact technical support.
  • For the S120VC, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a reflective ND diffuser (OD1). Additionally, they came with an 8-32 tap and M4 adpater. For additional information, please contact technical support.
  • For the S121C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a absorptive ND diffuser (Schott NG9). Additionally, they came with an 8-32 tap and M4 adpater. For additional information, please contact technical support.

Slim Profile Photodiode Sensors: S130C Series

Item #S130CS130VCS132C
Technical Specs
Detector TypeSilicon PhotodiodeSilicon Photodiode
(UV Extended)
Germanium Photodide
Wavelength Range400 nm - 1100 nm200 nm - 1100nm700 nm - 1800 nma
Optical Power Range
(with filter)
500 pW - 5 mW
(Up to 500 mW)
500 pW - 0.5 mWb
(Up to 50 mW)b
5 nW - 5 mW
(Up to 500 mW)
Max Average
Power Density
20 W/cm²10 W/cm²
Max Pulse Energy20 µJ
Linearity±0.5%
Resolution100 pWc100 pWc1 nWd
Measurement
Uncertaintye
±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±5%
General Information
Typical ApplicationLow Power Lasers
Laser TypesDiode, Diode Arrays, He-Ne, Dye, Ion Lasers (Ar+, Kr+)
Coating / DiffuserReflective ND (OD2)fReflective ND (OD1.5)bAbsorptive ND (Schott NG9/KG3)a
CoolingConvection
Console CompatibilityPM200, PM100D, PM100A, PM320E, and PM100USB
Response Time<1 µs
Mechanical Specs
Sensor Dimensions150 mm x 19 mm x 10 mm; 5 mm Thickness on Sensor Side
Active Sensor Area9.7 mm x 9.7 mm
Sensor ApertureØ9.5 mm
Distance to ND Filter0.9 mm
Distance to Detector3.4 mm
Cable Length1.5 m
ConnectorSub-D 9-pin male
Weight0.125 kg
Mounting and Accessories
Post8-32 and M4 threads
Aperture Thread (Optional)SM1, Outer Thread with SM1A29 Adapter
Fiber Adapters (Optional)FC, SC, LC, SMA, ST (SM1A29 Adapter Required)
  • For the S132C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a reflective ND diffuser (OD1), which would decrease the wavelength range from 700 nm to 1800 nm to 1200 nm to 1800 nm. For additional information, please contact technical support.
  • For the S130VC, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an optical power range of 5 nW to 5 mW (50 nW to 50 mW with filter) and a reflective ND diffuser (OD1). For additional information, please contact technical support.
  • Measured with PM100D console in low bandwidth setting, without filter.
  • Measured with PM100D console in low bandwidth setting at 1550 nm, without filter.
  • Beam Diameter > 1 mm.
  • For the S130C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an absorptive ND diffuser (Schott NG9). For additional information, please contact technical support.

Microscope Slide Photodiode Sensor

Item #S170C
Technical Specs
Detector TypeSilicon Photodiode
Wavelength Range350 - 1100 nm
Optical Power
Working Range
10 nW - 150 mW
Max Average
Power Density
20 W/cm²
Max Pulse EnergyN/A
Linearity±0.5%
Resolutiona1 nW
Calibration
Uncertaintyb
±3% (531 - 1000 nm)
±5% (Over Rest of Range)
Responsivity (Click for Details)Typical Responsivity
General Information
Typical ApplicationLight Measurement on the Microscope Objective Plane
Coating/DiffuserReflective ND (OD 1.5)
CoolingConvection
Console CompatibilitycPM100D, PM100A, PM100USB, PM200, PM320E
Response Time<1 µs
Mechanical Specs
Overall Dimensions76.0 mm x 25.2 mm x 5.0 mm
(2.99" x 0.99" x 0.20")
Active Detector Area18 mm x 18 mm
Input Aperture20 mm x 20 mm
Cable Length1.5 m
ConnectorSub-D 9 Pin Male
Weight0.07 kg (0.15 lbs)
Mounting
Post8-32 and M4 Thread
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm.
  • Please note that the S170C power meter head is not compatible with older Thorlabs power meter consoles (PM100, PM30, PM300, PM300E, and S100).

Integrating Sphere Photodiode Sensors: S140C Series

Item#S140CS144CS142CS145CS146C
Technical Specs
Detector TypeSilicon PhotodiodeInGaAs PhotodiodeSilicon PhotodiodeInGaAs PhotodiodeInGaAs Photodiode
Wavelength Range350 nm - 1100 nm800 nm - 1700 nm350 nm - 1100 nm800 nm - 1700 nm900 nm - 1650 nm
Optical Power Range1 µW - 500 mW1 µW - 500 mW1 µW - 5 W1 µW - 3 W10 µW - 20 W
Max Average Power Density1 kW/cm²2 kW/cm²2 kW/cm²2 kW/cm²
Max Pulse Energy Density1 J/cm²7 J/cm²
Linearity±0.5%
Resolutiona1 nW1 nW1 nW1 nW10 nW
Measurement Uncertaintyb±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±5%±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±5%
General Information
Typical ApplicationLow and Mid Power Lasers / Fiber LasersLow and Mid Power Lasers / Fiber Lasers
Laser TypesDiode, He-Cd, ArIo, KrIo, Dye, Ti-Sapphiere, LEDDiode, Ti-Sapphire, He-Cd, ArIo, KrIo, Dye, LED
Coating / DiffusorZenith® PTFE Integrating Sphere (Ø1")Zenith® PTFE Integrating Sphere (Ø2")
CoolingConvection
Head Temperature MeasurementNTC Thermistor 4.7 kΩ
Console CompatibilityPM200, PM100D, PM100A, PM320E, and PM100USB
Response Time<1 µs<1 µs
Mechanical Specs
Sensor DimensionsØ45 x 30.5 mm70 x 74 x 70 mm
Active Detector Area3.6 x 3.6 mmØ2 mm3.6 x 3.6 mmØ2 mmØ1 mm
Input ApertureØ5 mmØ12 mm
Cable Length1.5 m
ConnectorSub-D 9-pin male
Weight0.2 kg0.6 kg
Mounting and Accessories
PostM4 and #8-32 Taps
Aperture ThreadSM1 (1.035"-40) Outer Thread with SM1A20 Adapter
Fiber Adapters (Optional)FC (Included), SMA, ST, LC, SC
  • Measured with PM100D console in low bandwidth setting.
  • Beam Diameter > 1 mm.

Fiber-Coupled Photodiode Sensors: S150C Series

Item #S150CS151CS154CS155C
Technical Specs
Detector TypeSilicon PhotodiodeSilicon PhotodiodeInGaAs PhotodiodeInGaAs Photodiode
Wavelength Range350 nm - 1100 nm400 nm - 1100 nm800 nm - 1700 nm800 nm - 1700 nm
Optical Power Range100 pW - 5 mW
(-70 dBm to 7 dBm)
1 nW - 20 mW
(-60 dBm to 13 dBm)
100 pW - 3 mW
(-70 dBm to 5 dBm)
1 nW - 20 mW
(-60 dBm to 13 dBm)
Max Average Power Density100 mW/cm²10 W/cm²100 mW/cm²10 W/cm²
Max Pulse Energy20 µJ
Linearity±0.5%
Resolutiona10 pW (-80 dBm)100 pW (-70 dBm)10 pW (-80 dBm)100 pW (-70 dBm)
Measurement Uncertaintyb±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±3% (451 - 1000 nm)
±5% (Over Rest of Range)
±5%
General Information
Typical ApplicationLow Power Fiber Lasers
Laser TypesFiber-Coupled Diode, He-Cd, ArIo, KrIo, Dye, Ti-Sapphire
Coating / DiffusorN/AAbsorptive ND (Schott NG3)N/AN/A
CoolingConvection
Head Temperature MeasurementcNTC Thermistor 3 kΩ
Console CompatibilityPM200, PM100D, PM100A, PM320E, and PM100USB
Response Time<1 µs<1 µs
Mechanical Specs
Sensor Dimensions36.2 mm x 31 mm x 14.5 mm (w/o Fiber Adapter)
Active Detector Area3.6 x 3.6 mm3.6 x 3.6 mmØ2 mm
Sensor ApertureØ5 mmØ5 mm
Distance to ND FilterN/A0.5 mmN/A0.5 mm
Distance to Detector2.5 mm2.9 mm1.5 mm3.2 mm
ConnectorSub-D 9-pin male
Weight0.03 kg
Mounting and Accessories
Aperture ThreadExternal SM05 (0.535"-40)
Fiber AdaptersIncluded: FC & SMA; Optional: LC, SC, STIncluded: FC; Optional: LC, SC, ST, SMA
  • Measured with PM100D console in low bandwidth setting.
  • For a beam diameter > 1 mm incident on the active area of the detector (i.e. at the detector surface after the light has exited the fiber and passed through any internal optics).
  • This specification is valid for devices with serial numbers 1203xxx and higher. For older versions, please contact technical support.

Sensor Connectors

D-type Male

DB9 Male

PinConnection
S120, S140, and S150 Series
and S170C Sensors
S130 Series Sensors
1Not Used
2EEPROM Data
3Photodiode Anode and NTC GroundPhotodiode Anode
4Photodiode Cathode
5Not Used
6EEPROM Ground
7NTCSlider Detection
8Not Used
9Not Used

Thorlabs offers a wide selection of power and energy meter consoles, ranging from the touch screen PM200 to our field power meters. Key specifications of all of our power meters are presented below to help you decide which device is best for your application. We also offer self-contained wireless power meters.

When used with our C-series sensors, Thorlabs' power meter consoles recognize the type of connected sensor and measure the current or voltage as appropriate. Our C-series sensors have responsivity calibration data stored in their connectors. The console will read out the responsivity value for the user-entered wavelength and calculate a power or energy reading.

  • Photodiode sensors deliver a current that depends on the input optical power and the wavelength. The current is fed into a transimpedance amplifier, which outputs a voltage proportional to the input current. The photodiode's responsivity is wavelength dependent, so the correct wavelength must be entered into the console for an accurate power reading. The console reads out the responsivity for this wavelength from the connected sensor and calculates the optical power from the measured photocurrent
  • Thermal sensors deliver a voltage proportional to the input optical power. Based on the measured sensor output voltage and the sensor's responsivity, the console will calculate the incident optical power.
  • Energy sensors are based on the pyroelectric effect. They deliver a voltage peak proportional to the pulse energy. If an energy sensor is recognized, the console will use a peak voltage detector and the pulse energy will be calculated from the sensor's responsivity.

The sensors are also capable of displaying the current or voltage delivered by the sensor. Alternatively, a current or voltage equivalent to the measured value is provided at the analog output.

Item #PM100APM100DPM100USBPM200PM320E
(Click Photo to Enlarge)PM100APM100DPM320EPM200PM320E
DescriptionAnalog Power Meter ConsoleDigital Power and Energy Meter ConsoleUSB Power and Energy Meter InterfaceTouch Screen Power and Energy Meter ConsoleDual-Channel Benchtop Power and Energy Meter Console
Compatible SensorsPhotodiode and ThermalPhotodiode, Thermal, and Pyroelectric
Housing Dimensions
(H x W x D)
7.24" x 4.29" x 1.61"
(184 mm x 109 mm x 41 mm)
7.09" x 4.13" x 1.50"
(180 mm x 105 mm x 38 mm)
3.74" x 2.50" x 1.30"
(95 mm x 63.5 mm x 32.5 mm)
6.70" x 4.93" x 1.48"
(170.2 mm x 125.1 mm x 37.5 mm)
122 mm x 220 mm x 325 mm
(4.8" x 8.7" x 12.8")
Channels12
External Trigger Input--- yes yes
Display
TypeMechanical Needle and LCD Display with Digital Readout320 x 240 Pixel Backlit Graphical LCD DisplayNo Built-In Display
Controlled via GUI for PC
Touch Screen Color Display
with VGA Resolution
240 x 128 Pixels
Graphical LCD Display
DimensionsDigital: 1.9" x 0.5"
(48.2 mm x 13.2 mm)
Analog: 3.54" x 1.65"
(90.0 mm x 42.0 mm)
3.17" x 2.36"
(81.4 mm x 61.0 mm)
-4.65" x 3.48"
(118.0 mm x 88.5 mm)
3.7" x 2.4"
(94.0 mm x 61.0 mm)
Refresh Rate20 HzUp to 500 Hz (PC Dependent)100 Hz20 Hz
Display Format
Numerical yes yes yes yes yes
Mechanical Analog Needle yes----
Simulated Analog Needle- yes- yes yes
Bargraph- yes yes yes yes
Trendgraph- yes yes yes-
Linegraph---- yes
Histogram- yes yes--
Statistics- yes yes yes yes
Memory
Type-SD Card-NAND Flash-
Size-2 GB-128 MB-
Power
BatteryLiPo 3.7 V 1300 mAh-LiPo 3.7 V 2600 mAh-
External5 VDC via USB or Included AC Adapter5 VDC via USB5 VDC via Included Power SupplySelectable Line Voltage: 100 V, 115 V, 230 V (±10%)
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Posted Comments:
Poster: shallwig
Posted Date: 2014-08-26 08:06:43.0
This is a response from Stefan at Thorlabs. Thank you very much for your inquiry. I am sorry but we have to take the sensor back for inspection and repair. It is not recommendable that you repair the sensor by yourself as we also have to recalibrate the sensor. The calibration data saved in the EPROM are only valid for the build in ND filter. The performance of the ND filters vary from lot to lot. I will contact you directly for further assistance.
Poster: cbrideau
Posted Date: 2014-08-25 13:31:27.83
I managed to crack the ND filter on my S170C. Would it be possible to get a new filter and some of the index matching gel to repair it? What would the best way be to get the gel off? It looks solid, so can I just peel it off? Also, the 'Feedback On' dropdown menu doesn't have the S170C in it.
Poster: tschalk
Posted Date: 2014-03-31 07:57:19.0
This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. These sensors do not provide a completely uniform response over their active area. Thus, to overcome these uniformity issues, the incident beam should have a diameter that fills at least 10% of the sensors active area. I will contact you directly with more detailed information.
Poster: christopher.long
Posted Date: 2014-03-14 13:43:39.06
Hi, can you tell me about the uniformity of the response across the full photodiode?
Poster: hambitza
Posted Date: 2013-07-02 01:52:38.183
Do I need the display unit only to directly read out the power, or can I attach e.g. the S145C power meter simply to an oscilloscope or something similar and read out the voltage in this way?
Poster: tschalk
Posted Date: 2013-07-03 05:34:00.0
This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. When the diode is illuminated, a photocurrent will flow. This photocurrent is proportional to the irradiance. Normally, the photocurrent is amplified in the power meter and displayed on a screen. The resulting photo current can be determined through the typical response graph in the spec sheet of the Sensor: http://www.thorlabs.com/Thorcat/18300/S145C-SpecSheet.pdf. The resulting current is in the range from 0,1nA to 3mA and you have to convert the current into a voltage to measure it with an oscilloscope. If you have further questions please do not hesitate to contact me at Europe@thorlabs.com, I will be happy to assist you.
Poster: clarafly
Posted Date: 2013-05-13 03:20:15.297
Can you sell the external SM1 threading adapter of the S14XC series separately? We want to use it with our old S144A.
Poster: jlow
Posted Date: 2013-05-14 09:20:00.0
Response from Jeremy at Thorlabs: We can definitely do this. We will contact you directly for the quote.
Poster: jvigroux
Posted Date: 2013-02-26 04:09:00.0
A response from Julien at Thorlabs: thank you for your inquiry. The sample rate of the S150C when connected to one of our readout consoles is limited by the readout unit. There are different bandwidth and rate to be considered but the main ones are: 1. amplifier bandwidth-100kHz, 2. Clock frequency of the processor - 3kHz, 3. refresh rate of the display - 20Hz. the rise time of the diode itself that is built in the S150C is in the ns range. The interplay between all those time scales can be quite complex so that in order to estimate the usability of such a sensor for measurement of pulsed or modulated light, one needs to know the exact parameters of the light source. I will contact you to discuss furtehr your application.
Poster: tschalk
Posted Date: 2013-01-02 08:00:00.0
This is a response from Thomas at Thorlabs. Thank you very much for your inquiry. To avoid saturation of the photo diode the specified max. power range must not be exceed. I will contact you directly for more detailed information. Best Regards, Thomas
Poster: sharon.goldstein
Posted Date: 2012-12-31 03:57:08.8
Hi, I have the S142C integration sphere. Max power according to the spec is 5W CW. I'm modulating the input power - square wave 50% duty cylce, can I put the maximum power on 10W (--> average is kept on 5W). BTW, wavelength is 915nm? Thanks, Sharon
Poster: tschalk
Posted Date: 2012-10-25 08:12:00.0
A response from Thomas at Thorlabs: Thank you for your inquiry. There is a damage threshold which is 20W/cm². You can find a lot more information in the spec sheet which you can find here: http://www.thorlabs.com/Thorcat/18300/S121C-SpecSheet.pdf
Poster: tds
Posted Date: 2012-10-24 21:27:44.193
I am using the power meter with the S121C in an automated way where a well focused laser might occassionally cross the sensor. Is there a laser damage threshold for this sensor?
Poster: jvigroux
Posted Date: 2012-04-10 11:13:00.0
A response from Julien at Thorlabs: thank you for your inquiry. Due to the large active areas of the photodiodes that are used in those sensors and the relatively small distance between fiber adapter output plane and sensor's surface, the FC adapter will work both for FC/PC and FC/APC. There is no risk that the deviation of the output beam from an angled cleave will bring the beam outside of the active area of the sensor
Poster:
Posted Date: 2012-04-10 12:03:20.0
any solution for FC/APC fiber??
Poster: klee
Posted Date: 2009-10-23 15:49:36.0
A response from Ken at Thorlabs to stefan.wackerow: Unfortunately, the S130VC is not compatible with the old PM100. We can upgrade the older sensor heads to be compatible with the new PM100D power meter. Price for upgrade depends on which sensor head. Please let us know which sensor head you have so that we can send you a quote for the upgrade.
Poster: stefan.wackerow
Posted Date: 2009-10-23 06:41:46.0
We have 2 power meters of the old PM100 type in use. We are interested in a S130VC. Is this new detector compatible to the old power meter? What about the sensor upgrade service, would it make the old sensors incompatible with the old power meters? What is the price?
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Standard Photodiode Power Sensors
S120C and quick release 30mm Cage System
Click to Enlarge

S120C and CP90F Quick-Release Mount
  • For General Purpose Optical Power Measurements
  • Integrated Viewing Target for Easy Sensor Alignment
  • Ø9.5 mm Sensor Aperture
  • Compaptible Fiber Adapters: S120-xx Series
  • Compatible with the PM200, PM100D, PM100USB, PM100A, and PM320E Consoles
  • Sensor, Protective Cap, IR Target, and Thread Adapter Included

The S12xC Standard Photodiode Power Sensors are ideal for metering low power coherent and incoherent sources from the UV to the NIR. The NIST-Traceable, calibrated sensors feature an integrated viewing target for easy alignment, enhanced shielding against electromagnetic interference, over termperature alert device, and large Ø9.5 mm sensor aperture. The sensors are compatible with 30 mm cage systems, Ø1/2" posts, and SM1 (1.035"-40) lens tubes, and are ideal for free-space and fiber-coupled sources.

Item #S120VCS120CS121CS122C
Sensor Image
(Click the Image to Enlarge)

S120VC

S120C

S121C

S122C

Aperture Size Ø9.5 mm
Wavelength Range 200 - 1100 nm 400 - 1100 nm 400 - 1100 nm 700 - 1800 nm
Power Range 50 nW - 50 mW 500 nW - 500 mW 50 nW - 40 mW
Detector Type Si Photodiode (UV Extended) Si Photodiode Ge Photodiode
Linearity ±0.5%
Resolutiona 1 nW 10 nW 2 nW
Measurement Uncertaintyb ±3% (451 - 1000 nm)
±5% (200 - 450 nm, 1001 - 1100 nm)
±3% (451 - 1000 nm)
±5% (400 - 450 nm, 1001 - 1100 nm)
±5%
Coating/Diffuser Reflective ND (OD1.5)c Reflective ND (OD1)d Reflective ND (OD2)e Absorptive ND (Schott NG9)
Head Temperature Measurement NTC Thermistor 4.7 kO
Housing Dimensions Ø30.5 mm x 12.7 mm
Cable Length 1.5 m
Post Mountingc,d,e Universal 8-32 / M4 Tap, Post Not Included
Aperture Thread External SM1 (1.035"-40)
Fiber Adapters S120-FC, S120-SMA, S120-ST, S120-LC, S120-SC (Not Included)
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm.
  • For the S120VC, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a reflective ND diffuser (OD1). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
  • For the S120C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an absorptive ND diffuser (Schott NG3). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
  • For the S121C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a absorptive ND diffuser (Schott NG9). Additionally, they came with an 8-32 tap and M4 adapter. For additional information, please contact technical support.
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S120VC Support Documentation
S120VC Standard Photodiode Power Sensor, Si, 200 - 1100 nm, 50 mW
$395.00
Today
S120C Support Documentation
S120C Standard Photodiode Power Sensor, Si, 400 - 1100 nm, 50 mW
$285.00
Today
S121C Support Documentation
S121C Standard Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
$310.00
Today
S122C Support Documentation
S122C Standard Photodiode Power Sensor, Ge, 700 - 1800 nm, 40 mW
$570.00
Today
Slim Photodiode Power Sensors
S130C Sensor in a 30mm Cage
Click to Enlarge

S130C Sensor in a 30 mm Cage
SM1A29 SM1 Thread Adapter for S130 Power Sensors
Click to Enlarge

SM1A29: SM1 Thread Adapter
mounted on a S130C Sensor
  • For Optical Power Measurements in Confined Spaces
  • Very Slim Design: 5 mm Thin on Sensor Side
  • Ø9.5 mm Sensor Aperture
  • Slideable ND Filter Automatically Changes Sensor Power Range
  • Compatible with the PM200, PM100D, PM100USB, PM100A, and PM320E Consoles
  • Optional SM1A29 Adapter with UV/IR Target and External SM1 Threading (More Details)

The S13xC Slim Photodiode Power Sensors are designed to take optical source power measurements in locations where space and accessibility are at a premium. The 5 mm thin Slim Photodiode Sensors can fit between closely space optics, cage systems, and other arrangements where standard power meters may not fit. The NIST-Traceable, calibrated sensors also feature a large Ø9.5 mm sensor aperture and slideable neutral density filter for dual power ranges in one compact device.

A separately available SM1A29 adapter can be attached by 2 setscrews to any S130 series power sensor to mount fiber adapters, light shields, filters or any other SM1-threaded (1.035"-40) mechanics or optics.

Item #S130VCS130CS132C
Sensor Image
(Click the Image to Enlarge)

S130VC

S130C

S132C

Aperture Size Ø9.5 mm
Wavelength Range 200 - 1100 nm 400 - 1100 nm 700 - 1800 nma
Power Range
(with filter)
500 pW - 0.5 mWb
(Up to 50 mW)b
500 pW - 5 mW
(Up to 500 mW)
5 nW - 5 mW
(Up to 500 mW)
Detector Type Si Photodiode (UV Extended) Si Photodiode Ge Photodiode
Linearity ±0.5%
Resolution 100 pWc 1 nWd
Measurement Uncertaintye ±3% (451 - 1000 nm)
±5% (200 - 450 nm, 1001 - 1100 nm)
±3% (451 - 1000 nm)
±5% (400 - 450 nm, 1001 - 1100 nm)
±5%
Coating/Diffuser Reflective ND (OD1.5)b Reflective ND (OD2)f Absorptive ND (Schott NG9/KG3)a
Housing Dimensions 150 mm x 19 mm x 10 mm; 5 mm Thickness on Sensor Side
Cable Length 1.5 m
Post Mounting 8-32 and M4 Taps
  • For the S132C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had a reflective ND diffuser (OD1), which would decrease the wavelength range from 700 nm to 1800 nm to 1200 nm to 1800 nm. For additional information, please contact technical support.
  • For the S130VC, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an optical power range of 5 nW to 5 mW (50 nW to 50 mW with filter) and a reflective ND diffuser (OD1). For additional information, please contact technical support.
  • Measured with PM100D console in low bandwidth setting, without filter.
  • Measured with PM100D console in low bandwidth setting at 1550 nm, without filter.
  • Beam Diameter > 1 mm.
  • For the S130C, these specifications are valid for devices with serial numbers 1203xxx or higher. Older versions had an absorptive ND diffuser (Schott NG9). For additional information, please contact technical support.
SM1A29 is an adapter that can be attached by 2 set screws to any S130 series power sensor. This gives the possibility to mount fiber adapters, light shields, filters or any other SM1 threaded mechanics or optics.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
S130VC Support Documentation
S130VC Slim Photodiode Power Sensor, Si, 200 - 1100 nm, 50 mW
$575.00
Today
S130C Support Documentation
S130C Slim Photodiode Power Sensor, Si, 400 - 1100 nm, 500 mW
$475.00
Lead Time
S132C Support Documentation
S132C Slim Photodiode Power Sensor, Ge, 700 - 1800 nm, 500 mW
$675.00
Today
SM1A29 Support Documentation
SM1A29 Customer Inspired! SM1 Thread Adapter for Slim Photodiode Sensors
$39.00
Today
Microscope Photodiode Power Sensor
Item #S170C
Sensor Image
(Click Image to Enlarge)
S170C Microscope Slide Power Head
Overall Dimensions 76.0 mm x 25.2 mm x 5.0 mm
(2.99" x 0.99" x 0.20")
Active Detector Area 18 mm x 18 mm
Input Aperture 20 mm x 20 mm
Wavelength Range 350 - 1100 nm
Optical Power Working Range 10 nW - 150 mW
Detector Type Silicon Photodiode
Linearity ±0.5%
Resolutiona 1 nW
Calibration Uncertaintyb ±3% (531 - 1000 nm)
±5% (350 - 530 nm, 1001 - 1100 nm)
Neutral Density Filter Reflective (OD 1.5)
Cable Length 1.5 m
Post Mounting Universal 8-32 / M4 Tap, Post Not Included
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm.
  • Wavelength Range: 350 nm to 1100 nm
  • Sensitive to Optical Powers from 10 nW to 150 mW
  • Designed to Measure Light on the Objective Plane of a Microscope
  • Silicon Photodiode with Large 18 mm x 18 mm Active Area
  • Sensor Housing Dimensions: 76.0 mm x 25.2 x 5.0 mm
  • Index Matching Gel Utilized in Design to Prevent Internal Reflections
  • Information Stored in Connector
    • Sensor Data
    • NIST- and PTB-Traceable Calibration Data
  • Post Mountable via 8-32 (M4) Tap

The S170C Microscope Slide Power Sensor Head is a silicon photodiode sensor designed to measure the power at the sample in microscopy setups. The silicon photodiode can detect wavelengths between 350 nm and 1100 nm at optical powers between 10 nW and 150 mW. The sensor head's 76.0 mm x 25.2 mm footprint matches that of a standard microscope slide and is compatible with most standard upright and inverted microscopes.

The photodiode has an 18 mm x 18 mm active area and is contained in a sealed housing behind a neutral density (ND) filter with OD 1.5. A 20 mm x 20 mm indentation around the surface of the ND filter is sized to accept standard microscope cover slips. An immersion medium (water, glycerol, oil) may be placed in this well directly over the ND filter, or a cover slip may be inserted first to simplify clean up. The gap between the photodiode and the neutral density filter has been filled with an index matching gel in order to prevent internal reflections from causing significant measurement errors when using high NA objectives with oil or water.

The bottom of the sensor housing features a laser-engraved grid to aid in aligning and focusing the beam. In standard microscopes, the grid can be used for beam alignment before flipping the sensor head to face the objective for power measurements. In inverted microscopes, turn on the transmitted illuminator to align the grid on the detector housing with the beam, thereby centering the sensor in front of the objective. Alternatively, the diffusive surface of the ND filter can be used as a focusing plane.

Sensor specifications and the NIST- and PTB-traceable calibration data are stored in non-volatile memory in the sensor connector and can be read out by the latest generation of Thorlabs power meters. The S170C power sensor is compatible with the PM100D, PM100A, PM100USB, PM200, and PM320E power meters. We reccomend yearly recalibration to ensure accuracy and performance. Calibration may be ordered using the CAL1 recalibration service available below. Please contact technical support for more information.

The complete set of specifications are presented on the Specs tab above. The full presentation for the S170C Microscope Slide Sensor Head may be found here.

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S170C Support Documentation
S170C Customer Inspired! Microscope Slide Power Sensor, 350 - 1100 nm, 150 mW
$1,059.00
Today
Integrating Sphere Photodiode Power Sensors
S142C and S140-BFA Bare Fiber Adapter
Click to Enlarge

S142C and S140-BFA Bare Fiber Adapter
S142C and S120-FC Fiber Adapter
Click to Enlarge

S142C and S120-FC Fiber Adapter
  • For Beam Shape and Entrance Angle Independent Power Measurements
  • Integrating Sphere Design Acts as a Diffuser with Minimal Power Loss
  • Ø5 mm or Ø12 mm Input Apertures
  • Removable S120-FC Fiber Adapters (FC/PC and FC/APC) Included
  • Compaptible Fiber Adapters: S120-xx Series and S140-BFA Bare Fiber Adapter (More Details)
  • Compatible with the PM200, PM100D, PM100USB, PM100A, and PM320E Consoles

The S14xC Integrating Sphere Photodiode Power Sensors are the choice for non-uniform, diverging, beam shape and entrance angle independent power measurements. Integrating spheres are ideal for power measurements from fiber sources, as well as off-axis free space sources. The integrating spheres feature large Ø5 mm or Ø12 mm apertures, SM1(1.035"-40") threaded front connections, enhanced shielding against electromagnetic interference, and an overtemp alert sensor. Because of the large active detector areas of these sensors, the included S120-FC fiber adapter can be used with FC/PC- or FC/APC-connectorized fiber. NIST-traceable data is stored in the sensor connector.

Item #S140CS142CS144CS145CS146C
Sensor Image
(Click the Image to Enlarge)

S140C

S142C

S144C

S145C

S146C

Aperture Ø5 mm Ø12 mm Ø5 mm Ø12 mm
Wavelength Range 350 - 1100 nm 800 - 1700 nm 900 - 1650 nm
Power Range 1 µW - 500 mW 1 µW - 5 W 1 µW - 500 mW 1 µW - 3 W 10 µW - 20 W
Detector Type Si Photodiode InGaAs Photodiode
Linearity ±0.5%
Resolutiona 1 nW 10 nW
Measurement
Uncertaintyb
±3% (451 - 1000 nm)
±5% (350 - 450 nm, 1001 - 1100 nm)
±5%
Coating/Diffuser Zenith® PTFE Integrating Sphere (Ø1") Zenith® PTFE Integrating Sphere (Ø2")
Head Temperature Measurement NTC Thermistor 4.7 kO
Housing Dimensions Ø45 mm x 30.5 mm 70 mm x 74 mm x 70 mm Ø45 mm x 30.5 mm 70 mm x 74 mm x 70 mm
Cable Length 1.5 m
Post Mounting M4 and 8-32 Taps
Aperture Thread Included Adapter with SM1 (1.035"-40) External Thread
Compatible Fiber Adapters S120-FC (Included), S120-SMA, S120-ST, S120-SC, S120-LC
  • Measured with PM100D console in low bandwidth setting.
  • Beam diameter > 1 mm
Based on your currency / country selection, your order will ship from Newton, New Jersey  
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S140C Support Documentation
S140C Integrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 500 mW
$655.00
Today
S142C Support Documentation
S142C Integrating Sphere Photodiode Power Sensor, Si, 350 - 1100 nm, 5 W
$910.00
Today
S144C Support Documentation
S144C Integrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 500 mW
$770.00
Today
S145C Support Documentation
S145C Integrating Sphere Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 3 W
$945.00
3-5 Days
S146C Support Documentation
S146C Integrating Sphere Photodiode Power Sensor, InGaAs, 900 - 1650 nm, 20 W
$945.00
Today
S140-BFA Support Documentation
S140-BFA Bare Fiber Adapter for S140/C Series Power Sensors
$120.00
Today
Fiber Photodiode Power Sensors
S150C and PM100D
Click to Enlarge

PM100D with S150C Sensor and FC Cable

The S15xC Compact Fiber Photodiode Power Sensor is designed to take power measurements from a wide variety of fiber coupled sources. The compact sensor, integrated into the power meter connector, features a unique integrated design housing the photodiode sensor, fiber coupling, and NIST-traceable data. Standard FC (and SMA - S150C and S151C) connectors are easily interchanged with a variety of standard fiber connectors.

Item #S150CS151CS154CS155C
Sensor Image
(Click the Image to Enlarge)

S150C

S151C

S152C

S153C

Included Connectors FCd & SMA FCd
Wavelength Range 350 - 1100 nm 400 - 1100 nm 800 - 1700 nm
Power Range 100 pW to 5 mW
(-70 dBm to +7 dBm)
1 nW to 20 mW
(-60 dBm to +13 dBm)
100 pW to 3 mW
(-70 dBm to +5 dBm)
1 nW to 20 mW
(-60 dBm to +13 dBm)
Detector Type Si Photodiode InGaAs Photodiode
Linearity ±0.5%
Resolutiona 10 pW (-80 dBm) 100 pW (-70 dBm) 10 pW (-80 dBm) 100 pW (-70 dBm)
Measurement Uncertaintyb ±3% (451 - 1000 nm)
±5% (350 – 450 nm, 1001 – 1100 nm)
±3% (451 - 1000 nm)
±5% (400 – 450 nm, 1001 – 1100 nm)
±5%
Coating/Diffuser N/A Absorptive ND (Schott NG3) N/A
Head Temperature Measurementc NTC Thermistor 3 kO
Aperture Thread External SM05 (0.535"-40)
Fiber Adapters Included: PM20-FC & PM20-SMA; Optional: PM20-LC, PM20-SC, PM20-ST Included: PM20-FC; Optional: PM20-LC, PM20-SC, PM20-ST, PM20-SMA
  • Measured with PM100D console in low bandwidth setting.
  • For a beam diameter > 1 mm incident on the active area of the detector (i.e. at the detector surface after the light has exited the fiber and passed through any internal optics).
  • This specification is valid for devices with serial numbers 1203xxx and higher. For older versions, please contact technical support.
  • Because of the large active detector area of these sensors, the included PM20-FC fiber adapter can be used with both FC/PC- and FC/APC-connectorized fiber. 
Based on your currency / country selection, your order will ship from Newton, New Jersey  
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S150C Support Documentation
S150C Compact Fiber Photodiode Power Sensor, Si, 350 - 1100 nm, 5 mW
$285.00
Today
S151C Support Documentation
S151C Compact Fiber Photodiode Power Sensor, Si, 400 - 1100 nm, 20 mW
$325.00
Today
S154C Support Documentation
S154C Compact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 3 mW
$410.00
Today
S155C Support Documentation
S155C Compact Fiber Photodiode Power Sensor, InGaAs, 800 - 1700 nm, 20 mW
$470.00
Today
Recalibration Service for Semiconductor Power Sensors

Thorlabs offers Calibration Services for our photodiode optical power sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. Recalibration of the console is included with the recalibration of a sensor. 

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CAL1 Support Documentation
CAL1 Recalibration Service for Si Power Meter Sensors except S130 Series
$134.00
Lead Time
CAL2 Support Documentation
CAL2 Recalibration Service for Ge & InGaAs Power Meter Sensors except S132 Series
$150.00
Lead Time
CAL-S130 Support Documentation
CAL-S130 Recalibration Service for Si Power Meter Sensors for S130 Series and PM160
$155.00
Lead Time
CAL-S132 Support Documentation
CAL-S132 Recalibration Service for Ge Power Meter Sensors for S132 Series only
$165.00
Lead Time
Bare Fiber Adapter
S140-BFA
  • Compatible with S140C Series Power Sensors
  • Power Measurements of Bare Fiber Outputs
  • Easy Loading and Positioning of Optical Fiber in V-Groove
  • Supports Fiber with Buffer Diameters from 250 to 450 µm
  • Tight Holding without Fiber Damage by Magnet-Clip
  • Attached by two M2.5x4 Counter Sunk Screws
Based on your currency / country selection, your order will ship from Newton, New Jersey  
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S140-BFA Support Documentation
S140-BFA Bare Fiber Adapter for S140/C Series Power Sensors
$120.00
Today
Internally SM1-Threaded Fiber Adapters

These internally SM1-threaded (1.035"-40) adapters mate connectorized fiber to any of our externally SM1-threaded components, including our photodiode power sensors, our thermal power sensors, and our photodetectors.

Please contact Tech Support if you are unsure if the adapter is mechanically compatible.

Item #S120-FCS120-SMAS120-STS120-SCS120-LC
Click Image to Enlarge S120-FC S120-SMA S120-ST S120-SC S120-LC
Fiber Connector Typea FC/PCb SMA ST SC LC
Thread Internal SM1 (1.035"-40)
  • Other Connector Types Available upon Request
  • In certain angle-independent applications, this adapter may also be used with FC/APC connectors.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
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S120-FC Support Documentation
S120-FC FC/PC Fiber Adapter Cap with Internal SM1 (1.035"-40) Thread
$38.00
Today
S120-SMA Support Documentation
S120-SMA SMA Fiber Adapter Cap with Internal SM1 (1.035"-40) Thread
$38.00
Today
S120-ST Support Documentation
S120-ST ST/PC Fiber Adapter Cap with Internal SM1 (1.035"-40) Thread
$38.00
Today
S120-SC Support Documentation
S120-SC SC/PC Fiber Adapter Cap with Internal SM1 (1.035"-40) Thread
$48.00
Today
S120-LC Support Documentation
S120-LC LC/PC Fiber Adapter Cap with Internal SM1 (1.035"-40) Thread
$48.00
Today
Internally SM05-Threaded Fiber Adapters

These internally SM05-threaded (0.535"-40) adapters mate connectorized fiber to our free-space detectors and power sensors, including, but not limited to:

Please contact Tech Support if you are unsure if the adapter is mechanically compatible.

Item #PM20-FCPM20-SCPM20-LCPM20-SMAPM20-ST
Adapter Image PM20-FC PM20-SC PM20-LC PM20-SMA PM20-ST
Connector Typea FCb SC LC SMA ST
Thread Internal SM05 (0.535"-40)
  • Other connector types are available upon request.
  • In certain angle-independent applications, such as mounting a fiber patch cable to the S15xC fiber photodiode sensors sold above, this adapter may also be used with FC/APC connectors.
Based on your currency / country selection, your order will ship from Newton, New Jersey  
+1 Qty Docs Part Number - Universal/Imperial Price Available / Ships
PM20-FC Support Documentation
PM20-FC FC/PC Fiber Adapter Cap with Internal SM05 (0.535"-40) Thread
$31.00
Today
PM20-LC Support Documentation
PM20-LC Customer Inspired! LC/PC Fiber Adapter Cap with Internal SM05 (0.535"-40) Thread
$43.00
Today
PM20-SC Support Documentation
PM20-SC SC/PC Fiber Adapter Cap with Internal SM05 (0.535"-40) Thread
$43.00
Today
PM20-SMA Support Documentation
PM20-SMA SMA Fiber Adapter Cap with Internal SM05 (0.535"-40) Thread
$31.00
Today
PM20-ST Support Documentation
PM20-ST ST/PC Fiber Adapter Cap with Internal SM05 (0.535"-40) Thread
$43.00
Today
Externally SM1-Threaded Slim Photodiode Adapter

Click to Enlarge

SM1 Lens Tube Mounted on an S132C Photodiode Sensor Using an SM1A29 Adapter
  • Compatible with Thorlabs Slim Photodiode Power Sensors
  • Enables Integration with Internally SM1-Threaded Components
  • Adds UV/IR Target Around Sensor

The SM1A29 adapter can be attached to our slim photodiode sensors using two setscrews, which are compatible with 0.035" (0.9 mm) hex keys. This allows for mounting internally SM1-threaded fiber adapters, filters, or other SM1-threaded mechanics or optics to our slim photodiode sensors.

Based on your currency / country selection, your order will ship from Newton, New Jersey  
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SM1A29 Support Documentation
SM1A29 Customer Inspired! SM1 Thread Adapter for Slim Photodiode Sensors
$39.00
Today
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