Ophir RM9-Thz radiometer

MKS Instruments has announced the Ophir RM9-Thz radiometer, a low noise, high sensitivity sensor for measuring low power levels of 50nW to 100mW from short pulse or CW lasers in the 0.7 to 10THz wavelength range. 

The RM9-Thz is a complete sensor measurement package that includes a NIST-calibrated pyroelectric sensor, THz absorber, and 18Hz chopper to measure a wide range of radiation. A digitally synthetized lock-in amplifier reduces external noise to a minimum, allowing the sensor to measure powers as low as 50nW. The output of the sensor can be displayed on any standard Ophir meter or on a PC.

The RM9-Thz features an 8mm aperture, very low noise levels of of ~20nW over 10s, and fast response times of 3.5s with display. The sensor can be connected to any standard Ophir meter or PC interface to display data, including Ophir’s StarLite, Nova II, and Vega smart displays, and Juno PC interface. The display is automatically configured and calibrated when plugged into one of the company’s laser measurement heads.