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LP 20

power measuring head for low laser powers

The main characteristic of this sensor is the very high sensitivity. With this it is possible to measure lowest laser powers with high precision. This sensor has a high linearity and in opposite to photo diodes no saturation effect at higher powers. The used black absorption coating allows the employment in a spectral range from 190nm up to 25µm. For stabilisation of the sensor we have used a thermal isolation of the sensor housing. Additionally the housing has a removable tube to protect the surface against strange light and air moving.

Diameter of sensor area
20 mm
5 V/W
Time constant
< 2 sec.
max. power density 2,5 W/cm˛
max. average power
3 W
Detection threshold
50 µW
diameter 45 mm, length without tupe 45 mm