Journal
IEEE PHOTONICS TECHNOLOGY LETTERS
Volume 23, Issue 13, Pages 857-859Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/LPT.2011.2140393
Keywords
Differential-group-delay; microwave photonics; photonic comb filter
Funding
- National Natural Science Foundation of China (NSFC) [60972003]
- Program for New Century Excellent Talents in University [NCET-08-0821]
- Ministry of Education
- Research Project in Sichuan Province of China [2010HH0009]
- State Key Laboratory of Advanced Optical Communication Systems and Networks, China
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A photonic comb filter with digitally tunable bandwidth and frequency spacing is proposed. Using cascaded differential-group-delay (DGD) element and polarization switch based filters, we demonstrate independent tunability of both parameters with > 12-dB first-sidelobe reduction for a 6-bit configuration. Limitations of such an approach are also discussed.
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