Supermode noise suppression with mutual injection locking for coupled optoelectronic oscillator

Optics Express
Jian DaiKun Xu

Abstract

The coupled optoelectronic oscillator (COEO) is typically used to generate high frequency spectrally pure microwave signal with serious sidemodes noise. We propose and experimentally demonstrate a simple scheme for supermode suppression with mutual injection locking between the COEO (master oscillator with multi-modes oscillation) and the embedded free-running oscillator (slave oscillator with single-mode oscillation). The master and slave oscillators share the same electrical feedback path, which means that the mutually injection-locked COEO brings no additional hardware complexity. Owing to the mode matching and mutually injection locking effect, 9.999 GHz signal has been successfully obtained by the mutually injection-locked COEO with the phase noise about -117 dBc/Hz at 10 kHz offset frequency. Besides, the supermode noise can be significantly suppressed more than 50 dB to below -120 dBc.

References

Jan 12, 2008·Optics Letters·X S Yao, L Maleki
Jan 1, 1994·Optics Letters·C R DoerrK Tamura
May 19, 2010·Optics Letters·A A SavchenkovL Maleki
Mar 22, 2014·Nature·Paolo GhelfiAntonella Bogoni

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Citations

Oct 30, 2020·Optics Express·Bo YangHao Chi

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