NTT THz Optics for Standoff Gas Detection

NTT in Japan is working to develop stand-off Gas detection using
a transceiver based upon SIS power detectors and source
generation by optical down conversion.

Dr Shimizu-san, who leads the development group, has recently
taken delivery of a broadband 220 to >500 GHz Multiplexer and
high gain (64dBi antenna feed)


The beam profiles at 7.5 Metres well match the simple Gaussian
Beam-Mode predictions, as can be seen below. The predicted
beamwidth value at this distance is some 155mm, compared
with the displayed measurement of 15 cm.



High Frequency Circuit Simulator at TK

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