FREQUENCY MIXING-BASED FREQUENCY RESPONSE MEASUREMENT METHOD AND DEVICE FOR PHOTODETECTOR

WIPO Patent Application WO/2021/057025

A1

A frequency mixing-based frequency response measurement method and device for a photodetector. Said method comprises: using two microwave signals with angular frequencies of Δω and ωe to modulate two homogenous optical carriers respectively, so as to respectively obtain a carrier-suppressed optical single-sideband modulation signal and a carrier-suppressed optical double-sideband modulation signal, ωe <Δω; coupling the carrier-suppressed optical single-sideband modulation signal and the carrier-suppressed optical double-sideband modulation signal, and then inputting same into a photodetector to be measured, and measuring a Δω + ωe component and a Δω - ωe component in an optical current signal outputted by said photodetector; and according to the measured data, calculating frequency responses of said photodetector at frequencies of Δω + ωe and Δω - ωe. The present invention can break through the limitation of the bandwidth of the electro-optic modulator, double the measurement range of the photoelectric frequency response, improve the measurement efficiency, and reduce the measurement time and the measurement cost.

XUE MIN (CN)
LV MINGHUI (CN)
PAN SHILONG (CN)

PCT/CN2020/087449

April 01, 2021

April 28, 2020

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NANGJING UNIV OF AERONAUTICS AND ASTRONAUTICS (CN)

G01R23/16; G01M11/00

CN110632388A	2019-12-31
CN107741525A	2018-02-27
CN108088655A	2018-05-29
CN106501601A	2017-03-15
CN107132027A	2017-09-05
CN109728862A	2019-05-07
US6064694A	2000-05-16

JW IP LAW FIRM (CN)

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