Tunable optical fiber optical parameter oscillator based on Rayleigh backscattering

Abstract

The invention discloses a tunable fiber optical parameter oscillator based on Rayleigh backscattering, and belongs to the technical field of fiber lasers. The tunable fiber optical parameter oscillator consists of a tunable laser, a first polarization controller, a phase modulator, a pulse pattern generator, a second polarization controller, an erbium-doped fiber amplifier, an optical isolator, a first circulator, a fiber bragg grating, a high nonlinear dispersion displacement fiber, a tunable band-pass filter, a wavelength division multiplexer, an erbium-doped fiber pumping laser source, an erbium-doped fiber, a second circulator, a single mode fiber and a third polarization controller. An annular structure is formed by the first circulator, the high nonlinear dispersion displacement fiber, the tunable band-pass filter, the wavelength division multiplexer, the erbium-doped fiber, the second circulator, the third polarization controller and the fiber bragg grating, and an oscillation cavity is formed together with the single mode fiber, so that random laser output is realized. The tunable characteristic of output random laser can be realized by changing the operating wavelength of the tunable band-pass filter. The tunable fiber optical parameter oscillator has the advantages of compact structure, tunable output wavelength, large tuning range and the like.

Description

technical field [0001] The invention relates to a fiber optic parametric oscillator, in particular to a tunable fiber optic parametric oscillator based on Rayleigh backscattering, belonging to the technical field of fiber lasers. Background technique [0002] Fiber optic parametric amplifiers have attracted widespread attention because of their high gain, wide gain bandwidth, material-independent gain range, and fast response time. The corresponding fiber optic parametric oscillator uses a resonant cavity with a fixed cavity length to select the emission frequency and obtain laser output. However, based on our research results, there are no related reports on tunable fiber optic parametric oscillators based on Rayleigh backscattering at home and abroad. Contents of the invention [0003] The object of the present invention is to provide a tunable fiber optic parametric oscillator based on Rayleigh backscattering, which utilizes Rayleigh backscattering of single-mode fiber...

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Problems solved by technology

However, based on our research results, there are no reports on tunable fiber optic parametric oscillators based on Rayleigh backscattering at home and abroad.

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