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EnergyMax - Laser Energy Sensors
The spectral range of these sensor technologies and absorbing coatings are shown in the table below. After identifying a sensor
type and coating, the detailed specications in this catalog (see pages 20 through 48) can be used to select a specic sensor
model for your application.
After selecting a sensor model, the nal step is to identify a meter to measure, display and analyze the sensor output.
The information on the next page summarizes the capabilities and features of our meters and lists their compatibility
with different sensors. Visit www.Coherent.com/LMC and use our Product Finder to assist you in making your sensor and
meter selections.
Laser
Cross-
Reference
Index
POWER
& ENERGY
Power
Sensors
Energy
Sensors
Custom
& OEM
BEAM
DIAGNOSTICS
CALIBRATION
& SERVICE
INDICES
Product
Name
Index
Power
& Energy
Meters
Coherent energy sensors use a pyroelectric element to measure the energy in a laser
pulse. It does this by producing a large electrical charge for a small change in temperature.
The active sensor circuit takes the current from the sensor element and converts it to a
voltage that can be measured by a peak detector circuit or a Coherent meter. Pyroelectrics
can only be used with pulsed lasers.
Pyroelectric sensors are ideal for measuring the output of pulsed lasers. These devices can
be used at repetition rates to 10 kHz and beyond, and can be used to measure laser pulses
beyond a Joule.
The following information can help determine which sensor technology to choose based upon the type of laser used and the
type of measurement needed.
Pyroelectric
Sensor Technology Measurement Range
Laser Type Measurement Needed Power Range Wavelength Range Sensor Type
CW Laser Average Power 10 nW to 50 mW 250 nm to 1800 nm Optical
100 µW to >5 kW 0.15 µm to 12 µm Thermopile
Pulsed Laser Average Power 100 µW to >5 kW 0.15 µm to 12 µm Thermopile
Pulsed Laser Energy Per Pulse 100 nJ to >10J 0.15 µm to 12 µm Pyroelectric
Long Pulse Laser (>1 ms) Single Pulse 1 mJ to >300J 0.15 µm to 12 µm Thermopile
Integrated Energy
Sensor Technologies
Power and Energy Measurement Solutions
Model Wavelength (nm) 100 1000 10,000
PowerMax - UV Coating 150 to 1000
PowerMax - Broadband Coating 190 to 11,000
Volume Absorber 250 to 3000
UV 200 to 400
VIS 400 to 1064
IR 800 to 1800
MaxBlack Coating 190 nm 12,000
MaxUV Coating 190 to 2100
Diffuse Metallic Coating 190 to 2100
Thermal Sensors
Semiconductor
Sensors
Energy Sensors
Wavelength (nm)
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