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Superior Reliability & Performance • www.Coherent.com • LMC.sales@coherent.com

Coherent uses three primary coatings to capture the incident radiation on our thermal sensors. The specications for each

sensor list which coating is used. Typical wavelength ranges and response curves for these coatings are shown in the chart

below. Each sensor contains a spectral curve generated from reectance measurements taken with spectrometers. The

reectance data are converted into a wavelength compensation look-up table that is loaded into the sensor. This data is

accessed by selecting a wavelength of operation in the meters.

Many of our thermal sensors can measure power at levels greater than the maximum power rating for limited amounts of time.

The following chart outlines how much power can be measured over a range of exposure times (Note: Water-cooled sensors are

power-rated in air-cooled mode in this chart).

Laser

Cross-

Reference

Index

POWER

& ENERGY

Power

Sensors

Energy

Sensors

Custom

& OEM

BEAM

DIAGNOSTICS

CALIBRATION

& SERVICE

INDICES

Product

Name

Index

Power

& Energy

Meters

Introduction and Selection Charts

Power Sensors Introduction

0.90

0.95

1.00

1.05

1.10

Spectral Correction for Thermal Sensors (normalized to 514 nm)

0.1110

Wavelength (µm)

Spectral Correction Factor

Black Coating

Broadband & HTD Coatings

UV Coating

Exposure Limit vs.Power

024681012141618202224262830

100

120

140

160

180

Time (minutes)

Power (W)

PM150

PM30

PM150-19B

PM10-19B

PM150-50

PM150-50C

PM10

PM2

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 91 92

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