Newport’s 818P Series High Power Thermopile Detectors provide a full range of the highest quality detectors to meet most laser power measurement needs. These thermal detectors offer broadband, spectrally flat power detectors for general use. High peak power pulse damage resistance in specific UV and IR bands are also available. Maximum power ratings range from 1 to 400 Watts. Higher maximum power ratings require heatsink, fan, or water-cooled operation. Standard apertures of 12, 19, 25 and 55 mm are available. Volume absorber versions with an 18mm aperture are also available. Typical applications include measurements of CW or pulsed Ion, Nd:YAG, Ti:Sapphire, CO₂, Holmium lasers, high-power laser diodes and Excimer laser measurements in the UV range.
The newly introduced 818P-001-12 themal sensor head offers the flat spectral response and the low spatial dependence of thermopile detectors, while retaining the high sensitivity of photodiodes. Users working with lasers in the µW and mW range will appreciate its lower thermal drift compared to the standard thermopile detectors. It is ideally suited for measuring pulsed laser diodes, OPA, gas lasers (HeNe, argon, etc) or any low power laser.
Each 818P thermopile detector include a DB15 connector and internal EEPROM for storing factory calibration ...

Newport’s 818P Series High Power Thermopile Detectors provide a full range of the highest quality detectors to meet most laser power measurement needs. These thermal detectors offer broadband, spectrally flat power detectors for general use. High peak power pulse damage resistance in specific UV and IR bands are also available. Maximum power ratings range from 1 to 400 Watts. Higher maximum power ratings require heatsink, fan, or water-cooled operation. Standard apertures of 12, 19, 25 and 55 mm are available. Volume absorber versions with an 18mm aperture are also available. Typical applications include measurements of CW or pulsed Ion, Nd:YAG, Ti:Sapphire, CO₂, Holmium lasers, high-power laser diodes and Excimer laser measurements in the UV range.
The newly introduced 818P-001-12 themal sensor head offers the flat spectral response and the low spatial dependence of thermopile detectors, while retaining the high sensitivity of photodiodes. Users working with lasers in the µW and mW range will appreciate its lower thermal drift compared to the standard thermopile detectors. It is ideally suited for measuring pulsed laser diodes, OPA, gas lasers (HeNe, argon, etc) or any low power laser.
Each 818P thermopile detector include a DB15 connector and internal EEPROM for storing factory calibration data, making them compatible with Newport's new 1936-C and 2936-C Series Optical Meters (see Optical Power and Energy Meters, High Performance, 1936-C/2936-C ), and 1918-C ([BAD REF 164224 ]) and 842-PE Handheld Power/Energy Meter ([BAD REF 128310 ]). When using with Newport's legacy 1835-C and 2835-C Series Optical Meters, use the adaptor cable 818P-DIN (ordered separately).
All 12mm aperture thermal sensor heads have a 8-32 tapped hole and all other detectors have a 1/4-20 tapped hole for post or plate mounting.
Calibration of the thermopile detectors is required annually to assure NIST traceability. Newport’s recalibration services are geared to provide fast turnaround to meet your tight schedule.