作者: Zhiyao Zhang , Shangjian Zhang , Yong Liu , Yali Zhang , Mengke Wang
DOI: 10.1364/OE.420662
关键词:
摘要: An approach to measuring the frequency response of high-speed photodiodes (PDs) is proposed and experimentally demonstrated based on employing an ultrashort optical pulse train sample envelope-modulated microwave subcarrier. Through up-and-down conversion sampling, a varying component fixed low can be obtained, where probes ultra-wideband information PD. relative amplitude between two components, PD at any within range calculated by taking as reference. Thereinto, electro-optic modulator cancelled out, uneven comb intensity introduced corrected choosing specific In proof-of-concept experiment, self-calibrated measurement commercial with repetition rate 9.954 GHz sweeping up 4.977 GHz. The achieved 49.77 GHz, resolution reaches 300 kHz in rough 10 Hz level fine measurement. consistency method conventional methods proves hyperfine PDs.