Coherent multi-wavelength light source based on light phase modulation and light amplification in optical fiber ring cavity

Abstract

The invention relates to a coherent multi-wavelength light source based on light phase modulation and light amplification in an optical fiber ring cavity, which is used for the fields of large-capacity microwave photon communication and dense wavelength division multiplexing optical fiber communication. In the invention, a laser beam emitted by a laser light source enters the optical fiber ring cavity through an optical coupling module, and the optical fiber ring cavity comprises a light phase modulation module and a light amplification module. An active optical fiber light amplifier or a semiconductor light amplifier can be adopted by the light amplification module. The light source has high output power, hundreds of wavelength narrow linewidth lasers can be output, and each wavelength laser has stable power; the adjacent wavelength lasers have good coherence, and millimeter waves for generating ideal microwave photon communication can be beaten; meanwhile, the light source has simple structure, mature used devices, no need of high-power pump light and low cost.

Description

technical field [0001] The invention belongs to the field of large-capacity microwave photon communication or wavelength division multiplexing optical fiber communication, in particular a coherent multi-wavelength light source based on optical phase modulation and optical amplification in an optical fiber ring cavity. Background technique [0002] The main methods for generating multi-wavelength light sources for microwave photonic communication at home and abroad are: using optical nonlinear effects to generate supercontinuum light sources, but requiring watt-level strong pump light to pump nonlinear media, and the coherence between different wavelength light waves The performance is poor, and the beat frequency millimeter wave frequency stability is not good. Spectrum segmentation is performed on the supercontinuum light source generated by ultrashort pulse pumping, but it works in pulse mode and the output power is low. For the supercontinuum light source using nonlinear...

AI Technical Summary

Problems solved by technology

The disadvantage of the multi-laser array method is also the poor frequency stability of the beat frequency mmWave

The output laser of two phase-locked lasers is used, but the structure is complex, the stability is difficult, and the cost is high. Only a single millimeter wave for microwave photon communication can be obtained.

The sideband light generated by the amplitude modulation and phase modulation of single-frequency laser is used as a multi-wavelength light source, and the frequency of the beat frequency millimeter wave is stable, but it is mainly used to obtain millimeter waves for single microwave photon communication, and the optical power utilization rate is low

At present, the light source used for wavelength division multiplexing optical communication is mainly single-wavelength light source, and the power of single-wavelength laser of multi-wavelength laser generated by intracavity filtering is not ideal.

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