US 12,074,608 B2
Optical sampling signal holding method for photonic analog-to-digital conversion system
Weiwen Zou, Shanghai (CN); Shiyu Hua, Shanghai (CN); and Na Qian, Shanghai (CN)
Assigned to Shanghai Jiao Tong University, Shanghai (CN)
Filed by Shanghai Jiao Tong University, Shanghai (CN)
Filed on Sep. 8, 2022, as Appl. No. 17/941,006.
Claims priority of application No. 202210596205.5 (CN), filed on May 18, 2022.
Prior Publication US 2023/0378969 A1, Nov. 23, 2023
Int. Cl. H03M 1/00 (2006.01); H03M 1/12 (2006.01)
CPC H03M 1/1245 (2013.01) [H03M 1/121 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An optical sampling signal holding method for a photonic analog-to-digital conversion system comprising photodetectors and electronic analog-to-digital converters, comprising
controlling frequency responses of photodetectors to selectively retain and filter out high-frequency components of signals generated by optical pulse sampling,
folding back the high-frequency components to signal frequency positions when quantified by the electronic analog-to-digital converters of a same rate, and creating a time offset opposite to a time mismatch to counteract time mismatch and to obtain signal outputs without time mismatch.