Journal article
RF Frequency Synthesizer Based on Self-Mode-Locked Multimode Lasers
Journal of lightwave technology, v 38(8), pp 2262-2270
15 Apr 2020
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Low-noise local oscillators are very important in modern communication systems. To realize a stable solution with a limited size, symmetric multimode multi-section semiconductor laser pairs are reported in this article for building a chip-level RF synthesizer. The symmetric laser structure utilizes a shared distributed Bragg reflector (DBR) and counterpropagating laser output with the help of an external feedback circuit to achieve self-mode-locking. The achieved phase noise performance is −92 dBc/Hz at a 10 kHz offset frequency for intermodal operation at 26.4 GHz using 5 locked modes, which is a 57 dB improvement compared to the free-running case. Moreover, an RF synthesizer covering frequencies of 11-13 GHz is realized based on the achieved mode-locked system using current tuning. The related phase noise of the laser pair beat-note output is −100 dBc/Hz at a 10 kHz offset of carrier frequencies of 11-13 GHz, which is 58 dB better than the phase noise of the beat-note output without mode-locking over 11-13 GHz.
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Details
- Title
- RF Frequency Synthesizer Based on Self-Mode-Locked Multimode Lasers
- Creators
- Tianchi Sun - Drexel UniversityAfshin S Daryoush - Drexel University
- Publication Details
- Journal of lightwave technology, v 38(8), pp 2262-2270
- Publisher
- IEEE
- Grant note
- Synergy Microwave Corporation, Patterson, NJ, USA
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Electrical and Computer Engineering
- Web of Science ID
- WOS:000528521100019
- Scopus ID
- 2-s2.0-85083331836
- Other Identifier
- 991019169645304721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Electrical & Electronic
- Optics
- Telecommunications