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Coherent PowerMax-Pro kW Sensors

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Coherent PowerMax-Pro kW Sensors

Coherent PowerMax-Pro kW Sensors

Average power up to 3kW


PowerMax-Pro (Patent #9,059,346) represents a dramatic technological advancement in laser power sensing that combines the dynamic range and laser damage resistance of a thermopile with the response speed of a semiconductor photodiode. The sensor is so fast that a kW laser measurement reaches steady state in less than 100 microseconds with no overshoot. This capability provides nearly instantaneous high power measurement.



  • Very fast 20µs response time
  • Measures high average power to 3kW
  • Large 30mm active area
  • Less than 1% back reflection
  • QBH adapter available

In traditional kW thermopile detectors, heat is generated in the absorbing coating when it is struck by the laser. The heat must then move through the thick copper substrate out to the edges, a distance of several centimeters, to where the thermocouple array is located. This heat flow takes time, which is why thermopiles take a minute or longer to steady out after the laser is turned on.


The high response speed of PowerMax-Pro sensors is particularly advantageous in commercial applications, where it enables CW laser power and pulsed laser energy to be sampled much more frequently, resulting in increased throughput and improved process control.


For further information please contact us or download the datasheet.


PowerMax-Pro kW datasheet                              Read more on Coherent's website


2019 LMC Catalogue