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Single Channel, Fiber-Coupled Laser Sources


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Single Channel, Fiber-Coupled Laser Sources

Laser Sources without Temperature Control

Features

  • Wavelengths Available from 405 - 1550 nm
  • Custom Wavelengths Available
  • Single Mode FC/PC Fiber Interface
  • Stable, Low Noise, Constant Power Output
  • Interlock Input

The S1FC Series Fiber-Coupled Laser Sources conveniently package a pigtailed Fabry-Perot laser diode and current controller into a single benchtop unit. The Fabry-Perot laser diode inside each unit is pigtailed to a single mode fiber that is terminated at an FC/PC bulkhead (wide 2.1 mm key compatible) attached to the front panel of the unit. The specific fiber types used internally for the pigtail are listed in the Specs tab. For connection to external devices, Thorlabs offers single mode fiber optic patch cables.

Also found on the front panel is a display that shows the output power in mW, an on / off key, an enable button, and a knob to adjust the laser power. The back panel includes an input that allows the laser diode drive current to be controlled via an external voltage source (DC or sine wave inputs accepted) and a remote interlock input. All of our fiber-pigtailed lasers utilize an angled fiber ferrule at the internal laser/fiber launch point to minimize reflections back into the laser diode, thereby increasing the stability of the laser diode's output.

For applications using a 635 nm or 1550 nm source, Thorlabs also offers a compact fiber-coupled laser source with a USB interface. For a polarized output, laser sources that incorporate polarization-maintaining fiber are also available for many of the same output wavelengths. For optogenetics applications, Thorlabs offers a 473 nm benchtop laser source that incorporates multimode fiber. For laser sources with custom wavelengths, please contact Tech Support.

Note: The laser must be off when connecting or disconnecting fibers from the device, particularly for power levels above 10 mW.

Common Specifications
Electrical
Power Stability15 min: ±0.05 dB, 24 hr: ±0.1 dB
(After 1 hr Warm-up at 25 ± 10 °C Ambient)
Display Accuracy±10%
Setpoint Resolution0.01 mW
Adjustment Range~0 mW to Full Power
AC Input115 VAC / 230 VAC (Switch Selectable) 50 - 60 Hz
Modulation Input0 - 5 V = 0 - Full Power, DC or Sine Wave Input Only
Modulation
Bandwidth
5 kHz Full Depth of Modulation
30 kHz Small Signal Modulation
Environmental
Operating Temperature15 to 35 °C
Storage Temperature0 to 50 °C
Item #S1FC405S1FC635S1FC660S1FC675S1FC780
WavelengthMinimum395 nm625 nm645 nm660 nm775 nm
Typical405 nm635 nm660 nm675 nm780 nm
Maximum415 nm640 nm665 nm680 nm795 nm
Spectruma
Minimum
Full Output Power
8.0 mW2.5 mW15.0 mW2.5 mW2.5 mW
Laser Class3B3R3B3R3B
Fiber
Fiber TypeS405-HPSM600SM600SM600SM800-5.6-125
Mode Field
Diameterb
2.9 µm @ 405 nm4.3 - 4.6 µm4.3 - 4.6 µm4.3 - 4.6 µm5.0 ± 0.5 µm @ 850 nm
Numerical Aperture0.120.10 - 0.140.10 - 0.140.10 - 0.140.13
Output Fiber
Connector
FC/PC, Wide 2.1 mm Key Compatible

 

Item #S1FC808S1FC980S1FC1060S1FC1310S1FC1550
WavelengthMinimum798 nm970 nm1054 nm1290 nm1530 nm
Typical808 nm980 nm1064 nm1310 nm1550 nm
Maximum818 nm990 nm1074 nm1330 nm1570 nm
Spectruma
Minimum
Full Output Power
20.0 mW13.0 mW20.0 mW1.5 mW1.5 mW
Laser Class3B3B3B1M1M
Fiber
Fiber TypeSM800-5.6-125SM980-5.8-125HI1060SMF-28e+SMF-28e+
Mode Field
Diameterb
5.6 µm5.8 µm @ 980 nm6.2 µm @ 1060 nm9.2 ± 0.4 µm @ 1310 nm10.4 ± 0.5 µm @ 1550 nm
Numerical Aperture0.10 - 0.140.13 - 0.150.140.140.14
Output Fiber
Connector
FC/PC, Wide 2.1 mm Key Compatible
  • Spectral plots are typical, and actual spectra vary from lot to lot. For further information, please contact Tech Support.
  • Mode Field Diameter (MFD) is specified as a nominal value.

Modulation In

BNC Female

BNC Female

0 to 5 V Max, 50 Ω

Remote Interlock Input

2.5 mm Mono Phono Jack

 

2.5 mm Phono Jack

Terminals must be shorted either by included plug or user device, i.e. external switch, for laser mode "ON" to be enabled.

Laser Safety and Classification

Safe practices and proper usage of safety equipment should be taken into consideration when operating lasers. The eye is susceptible to injury, even from very low levels of laser light. Thorlabs offers a range of laser safety accessories that can be used to reduce the risk of accidents or injuries. Laser emission in the visible and near infrared spectral ranges has the greatest potential for retinal injury, as the cornea and lens are transparent to those wavelengths, and the lens can focus the laser energy onto the retina. 

Alignment Tools
Laser Barriers
Enclosure Systems
Blackout Materials
Laser Glasses
Laser Viewing Cards
Laser Safety Signs
Shutter and Controllers

Safe Practices and Light Safety Accessories

  • Thorlabs recommends the use of safety eyewear whenever working with laser beams with non-negligible powers (i.e., > Class 1) since metallic tools such as screwdrivers can accidentally redirect a beam.
  • Laser goggles designed for specific wavelengths should be clearly available near laser setups to protect the wearer from unintentional laser reflections.
  • Goggles are marked with the wavelength range over which protection is afforded and the minimum optical density within that range.
  • Laser Barriers and Blackout Materials can prevent direct or reflected light from leaving the experimental setup area.
  • Thorlabs' Enclosure Systems can be used to contain optical setups to isolate or minimize laser hazards.
  • A fiber-pigtailed laser should always be turned off before connecting it to or disconnecting it from another fiber, especially when the laser is at power levels above 10 mW.
  • All beams should be terminated at the edge of the table, and laboratory doors should be closed whenever a laser is in use.
  • Do not place laser beams at eye level.
  • Carry out experiments on an optical table such that all laser beams travel horizontally.
  • Remove unnecessary reflective items such as reflective jewelry (e.g., rings, watches, etc.) while working near the beam path.
  • Be aware that lenses and other optical devices may reflect a portion of the incident beam from the front or rear surface.
  • Operate a laser at the minimum power necessary for any operation.
  • If possible, reduce the output power of a laser during alignment procedures.
  • Use beam shutters and filters to reduce the beam power.
  • Post appropriate warning signs or labels near laser setups or rooms.
  • Use laser sign lightboxes if operating Class 3R or 4 lasers (i.e., lasers requiring the use of a safety interlock).
  • Do not use Laser Viewing Cards in place of a proper Laser Barrier or Beam Trap.

 

Laser Classification

Lasers are categorized into different classes according to their ability to cause eye and other damage. The International Electrotechnical Commission (IEC) is a global organization that prepares and publishes international standards for all electrical, electronic, and related technologies. The IEC document 60825-1 outlines the safety of laser products. A description of each class of laser is given below:

ClassDescriptionWarning Label
1This class of laser is safe under all conditions of normal use, including use with optical instruments for intrabeam viewing. Lasers in this class do not emit radiation at levels that may cause injury during normal operation, and therefore the maximum permissible exposure (MPE) cannot be exceeded. Class 1 lasers can also include enclosed, high-power lasers where exposure to the radiation is not possible without opening or shutting down the laser. Class 1
1MClass 1M lasers are safe except when used in conjunction with optical components such as telescopes and microscopes. Lasers belonging to this class emit large-diameter or divergent beams, and the MPE cannot normally be exceeded unless focusing or imaging optics are used to narrow the beam. However, if the beam is refocused, the hazard may be increased and the class may be changed accordingly. Class 1M
2Class 2 lasers, which are limited to 1 mW of visible continuous-wave radiation, are safe because the blink reflex will limit the exposure in the eye to 0.25 seconds. This category only applies to visible radiation (400 - 700 nm). Class 2
2MBecause of the blink reflex, this class of laser is classified as safe as long as the beam is not viewed through optical instruments. This laser class also applies to larger-diameter or diverging laser beams. Class 2M
3RLasers in this class are considered safe as long as they are handled with restricted beam viewing. The MPE can be exceeded with this class of laser, however, this presents a low risk level to injury. Visible, continuous-wave lasers are limited to 5 mW of output power in this class. Class 3R
3BClass 3B lasers are hazardous to the eye if exposed directly. However, diffuse reflections are not harmful. Safe handling of devices in this class includes wearing protective eyewear where direct viewing of the laser beam may occur. In addition, laser safety signs lightboxes should be used with lasers that require a safety interlock so that the laser cannot be used without the safety light turning on. Class-3B lasers must be equipped with a key switch and a safety interlock. Class 3B
4This class of laser may cause damage to the skin, and also to the eye, even from the viewing of diffuse reflections. These hazards may also apply to indirect or non-specular reflections of the beam, even from apparently matte surfaces. Great care must be taken when handling these lasers. They also represent a fire risk, because they may ignite combustible material. Class 4 lasers must be equipped with a key switch and a safety interlock. Class 4
All class 2 lasers (and higher) must display, in addition to the corresponding sign above, this triangular warning sign Warning Symbol
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Posted Comments:
Poster: lmorgus
Posted Date: 2011-09-20 14:33:00.0
Response from Laurie at Thorlabs to elizabeth.daly: Thank you for your interest in our fiber-coupled laser sources. In response to your inquiry we have updated our website information to make it clearer that the output of our single mode sources will be randomly polarized. We have also added linkage over to our PM versions should those be more appropriate for your application. Again, thank you for your comments which have helped us to enhance the infomration available on our website.
Poster: bdada
Posted Date: 2011-09-15 15:05:00.0
Response from Buki at Thorlabs: The S1FCxxx series all utilize standard single mode fiber and is not polarization controlled; it is random. If the state of polarization is required for your application, please consider one of our S1FCxxxPM versions, which utilize polarization maintaining fiber. The PM source is available in 635, 780, 1310, and 1550nm versions. http://www.thorlabs.com/NewGroupPage9.cfm?ObjectGroup_ID=3362&pn=S1FC1310PM We will contact you directly once we determine if we can offer a custom 675nm bench top source.
Poster: elizabeth.daly
Posted Date: 2011-09-14 11:28:19.0
Im looking at the S1FC fibre-coupled laser sources, specifically S1FC675. I cant find any information about the polarization state of the output? Can you provide some details please?
Poster: jjurado
Posted Date: 2011-03-18 17:14:00.0
Response from Javier at Thorlabs to last poster: Thank you for submitting your inquiry. The angled fiber ferrule is really only intended to minimize primary back reflections to the laser diode. If minimizing back reflections resulting from the FC/PC bulkhead is a critical requirement for your application, we can offer a benchtop unit connectorized with an FC/APC bulkhead. Please contact us at techsupport@thorlabs.com and we will gladly assist you.
Poster:
Posted Date: 2011-03-17 14:17:13.0
From the description on the Overview tab, "All of our fiber pigtailed lasers utilize an angled fiber ferrule at the internal laser/fiber launch point to minimize reflections back into the laser diode, thereby increasing the stability of the laser diodes output." This doesnt seem relevant to these parts with the FC/PC bulkhead, unless you mean to recommend that a FC/PC-FC/APC cable should be used to minimize back reflections, right?
Poster:
Posted Date: 2010-08-24 03:31:24.0
A reply from Jens at Thorlabs: the S1FC635 is based on the HL6320G laser diode which we also offer as a separate product. That MQW laser diode will have a center wavelenght somewhere in the range of 625nm to 640nm. Even if we would select a diode at 635nm the output from the diode would cover a range around the center so that you would get light output of 635.xx nm. Using filters, temperature tuning and/or a hand selected diode might still be options, however we will need to know more about your application and will therefore contact you for further discussion.
Poster:
Posted Date: 2010-08-23 09:56:35.0
Our Lab is thinking to place an order of S1FC635, but we want to check with THORLABS if the wavelength is exactly at 635.00nm? or does is have freqency range like a LD has?
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S1FC405 Support Documentation
S1FC405 Fabry-Perot Benchtop Laser Source, 405 nm, 8.0 mW, FC/PC
$1,583.04
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S1FC635 Support Documentation
S1FC635 Fabry-Perot Benchtop Laser Source, 635 nm, 2.5 mW, FC/PC
$1,331.10
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S1FC660 Support Documentation
S1FC660 Fabry-Perot Benchtop Laser Source, 660 nm, 15.0 mW, FC/PC
$1,449.20
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S1FC675 Support Documentation
S1FC675 Fabry-Perot Benchtop Laser Source, 675 nm, 2.5 mW, FC/PC
$1,356.60
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S1FC780 Support Documentation
S1FC780 Fabry-Perot Benchtop Laser Source, 780 nm, 2.5 mW, FC/PC
$1,412.70
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S1FC808 Support Documentation
S1FC808 Fabry-Perot Benchtop Laser Source, 808 nm, 20.0 mW, FC/PC
$1,657.50
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S1FC980 Support Documentation
S1FC980 Fabry-Perot Benchtop Laser Source, 980 nm, 13.0 mW, FC/PC
$1,387.20
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S1FC1060 Support Documentation
S1FC1060 Fabry-Perot Benchtop Laser Source, 1064 nm, 20.0 mW, FC/PC
$2,580.60
Today
S1FC1310 Support Documentation
S1FC1310 Fabry-Perot Benchtop Laser Source, 1310 nm, 1.5 mW, FC/PC
$1,300.50
Today
S1FC1550 Support Documentation
S1FC1550 Fabry-Perot Benchtop Laser Source, 1550 nm, 1.5 mW, FC/PC
$1,341.30
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Temperature-Controlled Laser Sources: FP Laser Diode

S3FC Fabry-Perot Series Features

  • Standard Available Wavelengths: 405 nm, 473 nm, and 488 nm
  • Custom Wavelengths Available
  • Thermo-Electric Temperature Stabilization
  • Adjustable Temperature Set Point
  • Adjustable Power
  • Interlock Input

The S3FC series of single channel benchtop lasers have an integrated TEC element that is used to stabilize the temperature of the FP laser diode, which in turn stabilizes the output power and wavelength of the laser diode for a given drive current. The FP laser diode is pigtailed to a single mode fiber that is terminated at an FC/PC bulkhead connector (wide 2.1 mm key compatible) on the front panel. Also found on the front panel is a display that selectably shows either the output power in mW or the temperature in °C, a on / off key, an enable button, a knob to adjust the laser power (drive current), and a knob to adjust the temperature (TEC current). The back panel includes an input that allows the laser diode drive current to be controlled via an external voltage source and a remote interlock input. All of our fiber pigtailed lasers utilize an angled fiber ferrule at the internal laser/fiber launch point to minimize reflections back into the laser diode, thereby increasing the stability of the laser diode's output. For applications that require several laser sources, consider the temperature stabilized four channel fiber coupled laser source.

Note: The laser must be off when connecting or disconnecting fibers from the device, particularly for power levels above 10 mW.

Item #S3FC405S3FC473S3FC488
WavelengthMinimum395 nm468 nm483 nm
Typical405 nm473 nm488 nm
Maximum415 nm478 nm488 nm
Spectruma
Maximum Output Power6.0 mW20 mW20 mW
Laser Class3B3B3B
Power Stability15 min: ±0.05 dB, 24 hr:±0.1 dB
(After 1 hr Warm-up at 25 ± 10 °C Ambient)
Display Accuracy (mW)±10% of Actual
Setpoint Resolution0.01 mW
Adjustment Range~0 mW to Full Power
TEC
Stability0.005 °C/ 1 °C
Setpoint Accuracy±0.25 °C
Setpoint Resolution±0.1 °C
Adjustment Range20 ± 1 °C to 30 ± 1 °C
Environmental
Operating Temperature15 to 35 °C
Storage Temperature0 to 50 °C
AC Input115/230 VAC (Switch Selectable) 50 - 60 Hz
Modulation Input0 - 5 V = 0 - Full Power, DC or Sinewave Input Only
Modulation Bandwidth5 kHz Full Depth of Modulation
30 kHz Small Signal Modulation
FiberS405460-HP
Output Fiber ConnectorFC/PC, Wide 2.1 mm Key Compatible
  • Spectral plots are typical, and actual spectra vary from lot to lot. For further information, please contact Tech Support.

Modulation In

BNC Female

BNC Female

0 to 5 V Max, 50 Ω

Remote Interlock Input

2.5 mm Mono Phono Jack

 

2.5 mm Phono Jack

Terminals must be shorted either by included plug or user device, i.e. external switch, for laser mode "ON" to be enabled.

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S3FC405 Support Documentation
S3FC405 Fabry-Perot Benchtop Laser Source, 405 nm, 6.0 mW, FC/PC
$2,896.80
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S3FC473 Support Documentation
S3FC473 Fabry-Perot Benchtop Laser Source, 473 nm, 20 mW, FC/PC
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Temperature-Controlled Laser Sources: DFB Laser Diode

S3FC DFB Series Features

  • Two Wavelengths Available: 1310 nm and 1550 nm
  • Narrow Spectral Linewidths: <0.6 nm
  • Thermo-Electric Temperature Stabilization
  • 40 dB Optical Isolation
  • Adjustable Temperature Set Point
  • Adjustable Power
  • Interlock Input

The S3FC Series Fiber Coupled Laser Sources feature a narrow linewidth DFB laser diode and a 40 dB optical isolator to eliminate back reflections and frequency jitter. The S3FC Series incorporates an integrated temperature control system for increased wavelength and power stability. The diode temperature and output power can be adjusted using the two front panel adjustment knobs, which ensures that the DFB laser diode can be tuned to match the laser cavity (see the Tuning tab). Also found on the front panel is a display that selectably shows either the output power in mW or the temperature in °C, a on / off key, an enable button, and the FC/PC bulkhead connector (wide 2.1 mm key compatible). The back panel includes an input that allows the laser diode drive current to be controlled via an external voltage source and a remote interlock input.

Note: The laser must be off when connecting or disconnecting fibers from the device, particularly for power levels above 10 mW.

Item #S3FC1310S3FC1550
WavelengthMinimum1290 nm1530 nm
Typical1310 nm1550 nm
Maximum1330 nm1570 nm
Spectruma
Minimum Output Power1.5 mW
Laser Class3B
Power Stability15 min: ±0.05 dB, 24 hr:±0.1 dB
(After 1 hr Warm-up at 25 ± 10 °C Ambient)
Display Accuracy (mW)±10% of Actual
Setpoint Resolution0.01 mW
Adjustment Range~0 mW to Full Power
TEC
Stability0.005 °C/ 1 °C
Setpoint Accuracy±0.25 °C
Setpoint Resolution±0.1 °C
Adjustment Range20 ± 1 °C to 30 ± 1 °C
Environmental
Operating Temperature15 to 35 °C
Storage Temperature0 to 50 °C
AC Input115/230 VAC (Switch Selectable) 50 - 60 Hz
Modulation Input0 - 5 V = 0 - Full Power, DC or Sinewave Input Only
Modulation Bandwidth5 kHz Full Depth of Modulation
30 kHz Small Signal Modulation
FiberSMF-28e+
Output Fiber ConnectorFC/PC, Wide Key Compatible
  • Spectral plots are typical, and actual spectra vary from lot to lot. For further information, please contact Tech Support.

Modulation In

BNC Female

BNC Female

0 to 5 V Max, 50 Ω

Remote Interlock Input

2.5 mm Mono Phono Jack

2.5 mm Phono Jack

Terminals must be shorted either by included plug or user device, i.e. external switch, for laser mode "ON" to be enabled.

The benchtop laser source provides the ability to control not only the output power of the fiber coupled laser diode, it also allows for the precise control of the temperature at which the laser is operating. These two controls can be used to tune the fiber coupled laser diode to an optimum operating point, providing as stable an output as possible. The following graphs are from an OSA monitoring the output of a typical S3FC1550 laser.

power tuning a dfb laser for stability

The plots above show the effect of changing the operating current of the laser while maintaining a fixed operating temperature (in this case 24.5 °C). The first plot corresponds to a drive current of 75%. Notice the broad line width, the laser is not optimized but the output will appear to be stable. The next plot is at 80%. The laser is approaching a stable point but the second mode indicates the laser is not yet stable. The laser will randomly mode hop, shifting the power from one peak to another resulting in erratic performance and power output. In the third plot, the current is at 85% and shows a typical optimized DFB output: a single, very narrow line width and very stable power. The last two plots, taken at 90% and 95%, show the laser passing through the optimum point and starting to ebb again.

The plots below show the relationship of temperature verse stability. With the drive current fixed at 85% of maximum, the operating temperature was increased by 0.1°C per plot, starting at 24.3 °C. In the first plot, the laser appears stable but it can be improved. As the temperature is increased to 24.4 °C the laser enters a transition point between modes. At this temperature, the laser may mode hop resulting in erratic output. At 24.5 °C the laser has reached a stable operating point, indicated by the single narrow line width. The last two plots (24.7 °C and 24.9 °C) show the laser passing through the optimum point and decreasing in stability and desired output.

temperature tuning of a dfb laser

The examples above demonstrate the need to adjust the drive current and / or temperature of the laser diode in order to tune the output of the laser diode so that the output wavelength of the DFB laser diode matches laser cavity. There are multiple settings that will lase stably, and by varying one or both the lasing wavelength of the laser can be tuned over a narrow wavelength range.

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Posted Comments:
Poster: Thorlabs
Posted Date: 2010-10-19 15:55:17.0
Response from Javier at Thorlabs to Alejandro Garcia: the diode used in the S3FC1550 benchtop source is the ML925B11F (http://www.thorlabs.us/NewGroupPage9.cfm?ObjectGroup_ID=4737&pn=ML925B11F), with a threshold current spec of 8 mA. I will contact you directly with the spec sheet for this diode.
Poster: agarcia
Posted Date: 2010-10-19 15:17:40.0
Dear Company, My name is Alejandro García and I have a question for you. I bought a S3FC1550 - DFB Benchtop Laser Source, 1550 nm, 1.5 mW, FC/PC two years ago and I have seen that its Optical Spectrum presents oscilations when it is operated between 0.5mW and 0.8mW with constant temperature of 23.6ºC. If I detect this optical signal, I can see on electrical spectrum analyzer a microwave signal with a frequency at 4.9 GHz. I think the oscillation is because of the laser is operated around of current threshold, this efect is called (Relaxation Oscillation Frequency), however I can not know exactly this current threshold because the S3FC1550 - DFB Benchtop Laser Source, only has two knobs that permits to adjust optical power and temperature. In this case my question is: How can I know the current threshold or How can I have information about of current of this laser. Best Regards. Alejandro.
Poster: klee
Posted Date: 2009-12-02 11:46:54.0
A response from Ken at Thorlabs to melsscal: The 1.5mW is the minimum full output power, meaning that we guarantee the maximum output power to be at least 1.5 mW. The actual output power for each unit varies. If you need at least 1.75 mW we can possibly do it as a special.
Poster: melsscal
Posted Date: 2009-12-02 08:12:35.0
Dear Sir/Madam, Can you explain how far we can adjust the output power ? The Min Power in the specs of DFB Benchtop Laser Source, 1310/1550 nm, 1.5 mW, FC/PC is S3FC1310/S3FC1550 is 1.5mW.Can we get 1.85mW or 1.75mW too from these sources ? Regards A.K.Bose MELSS,KOLKATA/INDIA
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S3FC1310 Support Documentation
S3FC1310 DFB Benchtop Laser Source, 1310 nm, 1.5 mW, FC/PC
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S3FC1550 Support Documentation
S3FC1550 DFB Benchtop Laser Source, 1550 nm, 1.5 mW, FC/PC
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