The 919P-150-16HR thermal power/energy laser measurement sensor with a high damage threshold for high repetition rate pulsed lasers. It has a 16 mm aperture and can measure power from 0.3 to 150 W continuously and to 200 W intermittently. The high damage threshold CM absorber covers the 248 nm to 9.4 µm wavelength range and has a damage threshold of 35 kW/cm² for high repetition rates. The sensor comes with a standard 1.5 meter cable for connecting to a meter and a 2.25 inch long 1/2 inch diameter post with a 1/4-20 tapped hole on both ends.
The CM absorber is designed for use with high repetition lasers (>10 kHz) with ultra-short pulses of ns and ps, for which there are more damage threshold mechanisms in addition to the thermal effects and the sensor can be damaged due to ablation of the surface after long use.
The thermopile detector’s response to the input laser beam is characterized by its absorption. Newport thermopile sensors use four different types of coating in the sensors. The broadband BB type is employed in most of the 919P models and has an excellent absorption throughout the responsive wavelength range. The CM and SV types are used mainly with high repetition lasers with ultra-short pulses and have a relatively flat response.
The 919P sensors using BB and SV absorbers can measure wavelengths up to 11 µm, while the CM sensors can measure up to 9.4 µm.
The PF type has wavelength dependent response, and it is employed in the sensor 919P-050-18HP, which is specially designed for high energy density pulses and can measure up to 2.2 µm.
The 919P series thermopile detectors have been extensively tested for the damage threshold with a variety of lasers. You can trust our specifications and have your mind at ease.
Each 919P thermopile sensor includes a DB15 connector and internal EEPROM for storing factory calibration data. Most sensors (BB) are calibrated at three different wavelengths at 532 nm, 1070 nm and 10.6 µm. Other sensor types (PF, CM and SV) use other or additional wavelengths for their calibration for example: 190, 248, 355, and 2100 nm. Calibration of the thermopile detectors is recommended annually to assure NIST traceability.
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