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Quasi-Optical Broadband Detectors

Quasi-Optical Broadband Detectors. See next page for THz measurement…. Frequency Range 100-1000 GHz Performance expected to ~2 THz Responsivity 500 V/W typical NEP ~ 10 pW / rtHz Antenna directivity 25-35 dB nom. Sub-ns response time. Quasi-Optical Detector. Silicon Lens.

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Quasi-Optical Broadband Detectors

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  1. Quasi-Optical Broadband Detectors See next page for THz measurement… • Frequency Range 100-1000 GHz • Performance expected to ~2 THz • Responsivity 500 V/W typical • NEP ~ 10 pW/rtHz • Antenna directivity 25-35 dB nom. • Sub-ns response time Quasi-Optical Detector Silicon Lens QOD Responsivity Testing Focusing Mirror Detector • Use lens to fully couple source power to detector • Allows direct measurement of detector responsivity • Waveguide coupler used to measure transmitted power Focusing Mirror Source

  2. 600-900 GHz QOD Testing Quasi-Optical Detector Removable mounting plate Photo of 600-900 GHz Testing • The measured QOD response is comparable or higher than the waveguide ZBD in the 600-900 GHz band • ZBD responsivity 500-1500 V/W over WR-1.2 band • QOD and ZBD measured using identical test setup • Horn to horn coupling (1” distance) with no lens • Provides a relative measurement of two detectors • Excellent responsivity to > 1 THz Source 1” b/n Tx & Detector QOD

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