Double-pump Fourier domain mode-locked fiber optical parametric oscillator

Abstract

The invention relates to a fiber optical parametric oscillator for achieving Fourier domain mode-locked laser output. Seed light output by two semiconductor lasers is modulated by phase and amplified by a high power optical amplifier to serve as pump light, the pump light is output from the pump output end of a wavelength division multiplexer and enters high nonlinear fiber through a polarization controller, and a part of the pump light is transferred into signal light in the high nonlinear fiber due to fiber nonlinear effect. After the signal light passes through a second optical isolator, dispersion-shifted fiber and a tunable filter, most energy is fed back to the high nonlinear fiber from a high power shunt ratio output end of an optical coupler with 9:1 power shunt ratio through the wavelength division multiplexer so as to form resonance laser output. When modulation frequency of the tunable filter is equal to fundamental frequency of a laser resonant cavity, the Fourier domain mode-locked laser output can be obtained. The fiber optical parametric oscillator achieves the Fourier domain mode-locked laser output, has significant application value in the fields of optical tomography, fiber bragg grating sensing and the like, and has the advantages of being high in wavelength scanning frequency, flexible in laser output spectrum tuning range control and the like.

Description

technical field [0001] The invention belongs to the field of optical fiber light source technology and optical fiber nonlinear technology, and in particular relates to a double-pumped Fourier domain mode-locked optical fiber optical parametric oscillator based on highly nonlinear optical fibers and a method for realizing Fourier domain mode-locked laser output. Background technique [0002] The invention of optical fiber has brought revolutionary changes in the field of communication, and also provided people with a new type of laser light source. Fiber optic light sources including fiber lasers have attracted widespread attention, and fiber optic light sources have played an important role in the fields of laser processing, sensor detection, lighting, medical treatment, and scientific research. Fiber laser is the most important fiber light source. It has the advantages of high efficiency, good beam quality, high reliability, compact structure and good heat dissipation. Opt...

AI Technical Summary

Problems solved by technology

At present, there is no Fourier domain mode-locked fiber optic parametric oscillator with high-speed wavelength scanning. This kind of fiber optic parametric oscillator has important application value in the fields of optical tomography and fiber grating sensing.

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