期刊
OPTICS EXPRESS
卷 26, 期 7, 页码 8831-8840出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.26.008831
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资金
- Japan Science and Technology Agency (JST) ERATO MINOSHIMA Intelligent Optical Synthesizer (IOS) Project [JPMJER1304]
- JSPS KAKENHI [JP15K18082]
In multi-branch combs, the comb outputs from the branches suffer from different fiber noises, which often limit the uncertainty of the combs referring a highly-stable optical frequency. To overcome this limitation, we introduced fiber noise difference cancellation to multi-branch fiber combs. We detected and phase-locked the beat notes between the branch outputs and a common 1542 nm continuous wave laser. A piezo-electric transducer-based fiber stretcher was installed in each branch except for the branch used as the cancellation reference. We fabricated two quasi-identical combs with this mechanism and confirmed the relative frequency uncertainty by comparing them. The cancellation improved the frequency uncertainty to a low level of 10(-20) at a 100000-s averaging time. (c) 2018 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
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