Journal
IEEE PHOTONICS JOURNAL
Volume 14, Issue 4, Pages -Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JPHOT.2022.3197300
Keywords
Modulation; Bandwidth; Radio frequency; Frequency modulation; Photonics; Optical modulation; Optical pulses; Optical sampling; ring modulator; silicon photonics; sinc pulse sequences
Funding
- Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) [403579441, 424608109, 424608271, 424607946, 424608191, 403154102, 322402243]
- German Federal Ministry of Education and Research (BMBF, Bundesministeriumfur Bildungund Forschung) [13N14879]
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This study presents the optical sampling of microwave signals using a silicon photonics ring modulator with sinc-pulse sequences. By time interleaving, it achieves ultra-compact photonic integrated analog to digital converters with high sampling rate and analog bandwidth.
Sampling is the primary functional step of an analogue to digital conversion, required for sensing, measurement, signal processing, metrology, and various data communication applications. Here we present, for the first time, to the best of our knowledge, the optical sampling of different microwave signals with sinc-pulse sequences with a very compact integrated silicon photonics ring modulator. By a simple time interleaving with three branches, the employed ring modulator enables ultra-compact photonic integrated analog to digital converters with a sampling rate of three times the RF bandwidth of itself and of the used photodetector and electronic devices. Therefore, its analogue bandwidth is 50% higher than the RF bandwidth of the incorporated electronics and photonics. Thus, the method might enable high-bandwidth analogue to digital converters with ultra-compact footprint and lower power consumption for future communication systems, sensors, and measurement devices.
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