Method for realizing self-oscillation multi-carrier optical fiber light source and multi-carrier optical fiber light source system

Abstract

The invention discloses a method for realizing a self-oscillation multi-carrier optical fiber light source and a multi-carrier optical fiber light source system. The method comprises the following steps: establishing a multi-carrier optical fiber light source based on a cyclic frequency shift loop; amplifying an optical signal output by the multi-carrier optical fiber light source in an optical domain; carrying out longitudinal mode selection on the amplified optical signal in an optical domain; converting the optical signals subjected to longitudinal mode selection into corresponding electricsignals with different frequencies; carrying out electric domain filtering on the electric signal; carrying out electric domain amplification on the filtered electric signal; feeding back the amplified electric signal to a frequency shifter in a cyclic frequency shift loop of the multi-carrier optical fiber light source, and driving the frequency shifter to control the frequency shift amount of the optical signal, so that the multi-carrier optical fiber light source outputs the optical signal with a set frequency interval, and returning one part of the optical signal to the step 2 to carry out the next cycle; and using the other part of optical signals as multi-carrier output of the whole system. The invention has the characteristics of large output signal carrier coverage, flat power, low phase noise and no need of an additional radio frequency driving source.

Description

technical field [0001] The invention relates to an optical fiber light source. In particular, it relates to a method for realizing a self-oscillating multi-carrier fiber optic light source and a multi-carrier fiber optic light source system. Background technique [0002] Multi-carrier fiber optic light source, that is, a fiber optic light source that can simultaneously output multiple carriers of different frequencies. In recent years, multi-carrier fiber optic light sources have played an important role in communication systems such as Dense Wavelength Division Multiplexing (DWDM) and Orthogonal Frequency Division Multiplexing (OFDM), optical fiber sensing, optical component testing, spectroscopy, and phased array radar. It has been widely valued and studied by researchers at home and abroad. Multi-carrier fiber optic light sources can be divided into two categories: intracavity modulation and extracavity modulation according to their generation mechanism. [0003] (1) I...

AI Technical Summary

Problems solved by technology

However, the analysis of its system structure shows that the multi-carrier generation mechanism in the multi-carrier fiber optic light source based on the optoelectronic oscillator is still a single modulation with a certain modulation depth using modulators or cascaded modulators, which greatly limits its output. Optimization of spectral flatness and further expansion of carrier coverage

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