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AssigneeSouth China University of Technology
InventorsShanhui Xu, Qilai Zhao, Zhongmin Yang, Zhouming Feng, Changsheng Yang
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The present invention provides a repetition frequency-tunable optical frequency comb generated by basis of optical feedback. The optical frequency comb comprises a single-frequency laser resonant cavity, a wavelength division multiplexer, a single-mode semiconductor pump light source, an optical circulator, a first optical fiber coupler, a second optical fiber coupler, a photoelectric detector, a highly-stable signal source, an error signal processing system, a laser frequency modulation device and a tunable laser-delay module. The present invention performs delay-time processing to the single-frequency laser by the tunable laser-delay module, and achieves an optical feedback by the optical circulator for injecting to the resonant cavity, generating a series of tunable laser longitudinal modes with equal frequency space. Meanwhile, in combination with the highly-stable signal source, the error signal processing system and the laser frequency modulation device, a laser frequency lock is achieved, and the laser frequency comb is generated. The invention obtains a repetition frequency-tunable laser frequency comb with a simple and practical method, having an extensive application prospect and huge application value in fields such as optical fiber sensing and spectroscopy of atom and molecule.
A repetition frequency-tunable optical frequency comb generated by basis of optical feedback, characterized in that, the repetition frequency-tunable optical frequency comb comprises a single-frequency laser resonant cavity (1), a wavelength division multiplexer (2), a single-mode semiconductor pump light source (3), an optical circulator (4), a first optical fiber coupler (5), a second optical fiber coupler (6), a photoelectric detector (7), a highly-stable signal source (8), an error signal processing system (9), a laser frequency modulation device (10) and a tunable laser-delay module (11);
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