Type	Broadband	Ceramic
Energy Range	10 µJ - 2 J	500 µJ - 15 J
Wavelength Range	0.185 - 25 µm	0.185 - 25 µm
Coating	Black Broadband Coating	Ceramic Coating with High Damage Thresholds
Typical Application	Wavelength-Independent Energy Measurements	High Energy Densities
Fiber Adapters	No	No

Features

For Pulsed Applications Over a Wide Wavelength and Energy Range
Individually Calibrated with NIST- and PTB-Traceable Certificate of Calibration
BNC Connector for Direct Use with Oscilloscopes
Compatible with our C-Series Power Meters
Electrically Isolating Post Adapters Included

Thorlabs' Pyroelectric Energy Meter Sensors are sensitive to wavelengths from 185 nm to 25 µm and together span the energy range from 10 µJ to 15 J. All of these sensors provide a flat response over a large wavelength range. The ES220C and ES245C feature a ceramic coating that is specifically designed for lasers with high energy densities requiring high damage thresholds.

Compatibility
All the sensors listed here are compatible with the PM200, PM100D, PM320E, and PM100USB [see Power Meter Compatibility Chart (Excel spreadsheet)]. Please note that they are not compatible with the PM100A. Alternatively, the sensors can be connected directly to an oscilloscope with a 1 MΩ input resistance via the BNC connector. To accommodate higher repetition rates when connected to oscilloscopes, the load resistance can be reduced. A calibration value for a 100 kΩ resistor is given with the sensor certificate of calibration.

The bottom of the sensor head has an 8-32 mounting hole. Since the heads are very sensitive to ground loops and electrical noise, we recommend attaching the heads to the included electrically isolating post adapters, which provide direct compatibility with either imperial or metric Ø1/2" (Ø12.7 mm) Posts. The ES120C and the ES220C can also be mounted to our 30 mm Cage System via the four 4-40 threaded holes on the front, although this mounting option does not provide electrical isolation.

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 BNC to C-Series adapter and is downloaded automatically when connected to the console.

Thorlabs offers specific recalibration services for all our pyroelectric power sensors. To ensure accurate measurements, we recommend recalibrating the sensors annually. Please contact Tech Support for recalibration information and pricing. Expedited sensor calibration is also available.

Item #	ES111C	ES120C	ES145C	ES220C	ES245C
Technical Specs
Detector Type	Standard Pyroelectric Energy Sensor			High Energy Pyroelectric Energy Sensor
Wavelength Range	185 nm - 25 µm			185 nm - 25 µm
Optical Energy Range	10 µJ – 150 mJ	100 µJ – 500 mJ	500 µJ – 2 J	500 µJ – 3 J	1 mJ – 15 J
Max. Repetition Rate (@ 1 MΩ load)	40 Hz	30 Hz	30 Hz	30 Hz	30 Hz
Max Power Density (Pulse Width) Range	8 MW/cm² (10 ns Pulse) 185 nm - 25 μm			65 MW/cm² (7 ns Pulse) 185 nm - 25 μm	65 MW/cm² (7 ns Pulse) 185 nm - 25 μm
Max Pulse Energy Density (Pulse Width) Range	0.15 J/cm² (1 µs Pulse) 185 nm - 25 μm			0.45 J/cm² (7 ns Pulse) 185 nm - 25 μm	0.45 J/cm² (7 ns Pulse) 185 nm - 25 μm
Max Average Power	0.15 W	0.5 W	0.5 W	5 W	10 W
Resolution*	100 nJ	100 nJ	1 µJ	25 µJ	50 µJ
Linearity	±1%			±1%
Measurement Uncertainty	±5%			±5%
Thermal Time Constant	20 ms			20 ms

General Information
Typical Application	Energy Measurement for Pulsed Lasers with Pulse Lengths from sub-ns to ms			Energy Measurement for Pulsed Lasers with High Peak Power Density and Pulse Lengths from sub-ns to ms
Laser Types	Low Energy YAG and CO₂, Pulsed Diode, Ruby, Small Excimer			Excimer, CO₂, TEA, Nd-YAG
Coating / Diffusor	Black Broadband			Ceramic Coating
Cooling	Convection			Convection
Head Temperature Measurement	N/A			N/A
Console Compatibility	PM100USB, PM100D, PM320E, and PM200
Mechanical Specs
Sensor Dimensions	Ø36 x 16 mm²	Ø50 x 18 mm²	Ø75 x 21 mm²	Ø50 x 18 mm²	Ø75 x 21 mm²
Active Sensor Area	Ø11 mm (0.433")	Ø20 mm (0.79")	Ø45 mm (1.77")	Ø20 mm (0.79")	Ø45 mm (1.77")
Sensor Aperture	Ø11 mm (0.433")	Ø20 mm (0.79")	Ø45 mm (1.77")	Ø20 mm (0.79")	Ø45 mm (1.77")
Distance to ND Filter	N/A			N/A
Distance to Detector	2 mm (0.08")			2 mm (0.08")
Cable Length	1.5 m			1.5 m
Connector	BNC Male / Sub-D 9-pin Male, Adapter Included			BNC Male / Sub-D 9-pin Male, Adapter Included
Weight	0.1 kg	0.15 kg	0.32 kg	0.15 kg	0.32 kg
Mounting and Accessories
Post	8-32 Mounting Thread, 8-32 and M4 Insulating Adapters Included			8-32 Mounting Thread, 8-32 and M4 Insulating Adapters Included
Cage System Mounting	N/A	Four 4-40 Threadings for 30 mm Cage Systems	N/A	Four 4-40 Threadings for 30 mm Cage Systems	N/A
Aperture Thread	N/A			N/A
Fiber Adapters	N/A			N/A
IR Viewing Card	N/A			N/A

*Measured with PM100D Console

Sensor Connector

D-type Male

DB9 Male

Pin	Connection
1	+5 V (Drive Max: 50 mA)
2	EEPROM Digital I/O
3	Pyroelectric Sensor Ground
4	Not Used
5	Pyroelectric Sensor +
6	DGND
7	PRESENT [Connect This Pin through a 1 kΩ - 10 kΩ Resistor to Pin 3 (AGND)]
8	Not Used
9	Not Used

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Posted Comments:

Poster: julien

Posted Date: 2011-01-28 04:50:28.0

A response from Julien at Thorlabs: Thank you for your feedback. The specification of the pulse length for the 150mJ/cm2 value is wrong and will be changed immediately. This max energy density corresponds to the maximum energy for long pulses (>1µs). Above this value the heat increase will bring the sensor above its Curie temperature and thus hamper its proper functioning. The curve in the spec sheet corresponds to the damage threshold of the adsorber surface. When damaged, the absorption of this surface will change and the responsivity of the sensor will be modified accordingly.

Poster: matthew.bergkoetter

Posted Date: 2011-01-26 16:26:55.0

The max pulse energy density for the ES111C is specified here on the webpage as 0.15J/cm2 for a 10ns pulse at 1064nm, however the PDF spec sheet seems to contradict this. Based on the plot titled "Pulse Energy Ratings and Damage Thresholds", the max energy density for a 10ns pulse would be more like 2mJ/cm2 - a discrepancy of two orders of magnitude. Which is correct?

Poster:

Posted Date: 2010-09-21 05:45:39.0

Answer from Angelika at Thorlabs: The specification "max repetition rate" refers to the maximum data acquisition rate of the sensor. It is defined by the time constant of the sensor (time required to reach the initial sensor properties after a pulse).

Poster:

Posted Date: 2010-09-10 06:44:52.0

Does the maximum repetition rate for the ES111C of 40Hz refer to the maximum data acquisition rate of the sensor or the maximum repetition rate of the laser to avoid damage to the sensor?

Poster: julien

Posted Date: 2010-08-11 12:30:55.0

A response from Julien at Thorlabs: the wavelength dependence of the damage threshold is related to absorption of the surface coating. As can be seen in the tab absorption graph, the absorption of the ES100 series is almost wavelength independent. The damage threshold specified can be thus used over the whole wavelength range of those sensors.

Poster:

Posted Date: 2010-08-10 23:32:52.0

the Max Pulse Energy Density of ES111C is specified with 7ns pulse but at what wavelength?

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Pyroelectric Energy Sensors (C-Series)

Features

Sensor Connector

D-type Male