Low-Noise Repetition-Rate Multiplication by Injection Locking and Gain-Saturated Amplification

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Low-noise repetition-rate multiplication of optical pulses is demonstrated through harmonic injection locking of a mode-locked laser and gain-saturated amplification by a semi-conductor optical amplifier (SOA). The approach employs strong optical injection for lowering the repetition-rate phase noise, followed by gain-saturated SOA for suppression of pulse intensity irregularities. In this way, we can achieve low phase noise level and high side-mode suppression ratio (SMSR) at the same time. Experimentally, we show repetition-rate multiplication of a 250-MHz commercial mode-locked laser to 1-GHz repetition-rate, with 3% modulation depth, 33-dB SMSR, and 14-fs absolute rms timing jitter (when integrated from 10 kHz to 10 MHz offset frequency).
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2019-07
Language
English
Article Type
Article
Citation

IEEE PHOTONICS TECHNOLOGY LETTERS, v.31, no.13, pp.997 - 1000

ISSN
1041-1135
DOI
10.1109/LPT.2019.2914467
URI
http://hdl.handle.net/10203/263015
Appears in Collection
ME-Journal Papers(저널논문)
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