Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 39, Issue 17, Pages 5548-5557Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2021.3087656
Keywords
Optical waveguides; Optical pulses; Optical filters; Wavelength division multiplexing; Optical attenuators; High-speed optical techniques; Multiplexing; Integrated optics; modulation; multiplexing; optical devices; silicon photonics
Funding
- National Key R&D Program of China [2019YFB2203200, 2019YFB1802903, 2018YFB2201702]
- National Natural Science Foundation of China (NSFC) [62090052, 6207030193]
- Shanghai Municipal Science and Technology Major Project [2017SHZDZX03]
Ask authors/readers for more resources
The silicon-based integrated optical sampling chip utilizes WDM and MDM techniques to increase the pulse repetition rate. By employing AWG and multimode waveguides for wavelength and high-order mode multiplexing, the sampling rate is enhanced by 8 times. The sampled pulses are modulated and then separated for low-speed parallel processing.
We report a silicon-based integrated optical sampling chip. High-repetition-rate optical sampling pulses are generated by interleaving low-repetition-rate input optical pulses with the assistance of wavelength-division multiplexing (WDM) and mode-division multiplexing (MDM). The WDM pulse interleaver is based on a loopback arrayed waveguide grating (AWG) with linearly increasing delays. The amplitude of the interleaved pulses can be adjusted by the attenuators in the loopback waveguides. Two high-order modes in a multimode waveguide are utilized to further increase the pulse repetition rate. With WDM and MDM, the optical pulse sampling rate is increased by 8 times. The optical sampling pulses are then modulated by a multimode Mach-Zehnder modulator with the active arms integrated with L-shaped PN junctions. The sampled pulses are finally separated by mode and wavelength demultiplexers for low-speed parallel processing. The wavelength demultiplexer is made of a dual-ring assisted Mach-Zehnder interferometer (DR-MZI) with high wavelength selectivity. This successful implementation of the high-speed sampling chip marks a significant step forward in the full integration of analog-to-digital converters on a single chip and opens up avenues toward real applications of microwave photonics.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available