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Ultra-low noise optical injection locking amplifier with AOM-based coherent detection scheme.

ABSTRACT: A novel optical injection locking amplifier with acousto-optic modulator based phase modulation and a coherent detection scheme for optical frequency transfer applications is experimentally demonstrated in this study. A commercial distributed feedback diode laser is injection-locked to the resonant frequency of the optical signal with an optical fiber path length of hundreds of kilometers. This provides approximately 59?dB gain and ensures that the input carrier frequency fractional stability can be as good as 10-20 at 1000?s. The amplifier was tested for the transfer of a commercial narrow-linewidth laser in a 180?km fiber link to a remote site with only a single amplification step. The transferred frequency at the remote end reached 10-20 at 20000?s, which is suitable for optical frequency distribution and remote comparison between optical atomic clocks.

SUBMITTER: Feng Z

PROVIDER: S-EPMC6120882 | biostudies-other | 2018 Sep

REPOSITORIES: biostudies-other

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Ultra-low noise optical injection locking amplifier with AOM-based coherent detection scheme.

Feng Zitong Z Yang Fei F Zhang Xi X Chen Dijun D Wei Fang F Cheng Nan N Sun Yanguang Y Gui Youzhen Y Cai Haiwen H

Scientific reports 20180903 1

A novel optical injection locking amplifier with acousto-optic modulator based phase modulation and a coherent detection scheme for optical frequency transfer applications is experimentally demonstrated in this study. A commercial distributed feedback diode laser is injection-locked to the resonant frequency of the optical signal with an optical fiber path length of hundreds of kilometers. This provides approximately 59 dB gain and ensures that the input carrier frequency fractional stability ca ...[more]

PMID: 30177754

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