Dual-wavelength dissipative soliton mode-locked laser

Abstract

The invention provides a dual-wavelength dissipative soliton mode-locked laser, relates to the technical field of laser and aims to solve the problems that a conventional device is realized by adopting a space coupling mode, the coupling efficiency of the system is low, the space coupling equipment is large in size, and the system is low in stability and inconvenient to apply. The dual-wavelength dissipative soliton mode-locked laser comprises a wavelength division multiplexer, a gain optical fiber, an isolator and a coupling output element, and also comprises a band-pass filter, a first polarization controller and a second polarization controller, wherein the wavelength division multiplexer, the gain optical fiber, the band-pass filter, the first polarization controller, the isolator, the second polarization controller and the coupling output element are connected according to an optical fiber sequence to form an all-fiber annular cavity; the length of the gain optical fiber is a length through which the gain optical fiber has four-level start oscillation and three-level start oscillation. By adoption of a double-end pumped mode and the all-fiber annular cavity structure, the band-pass filter is inserted into the cavity, and stable dual-wavelength laser output is realized by adopting a polarization rotation mode-locked mode.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to a dual-wavelength dissipative soliton mode-locked laser. Background technique [0002] Multi-wavelength mode-locked pulsed fiber lasers can simultaneously generate ultrashort pulses at different wavelengths, which have applications in optical sensing, optical measurement, microwave photonics, optical signal processing, terahertz wave generation, and wavelength division multiplexing optical transmission systems. very important application. Due to its simple and compact structure, dual-wavelength fiber lasers based on nonlinear polarization rotation have attracted extensive attention in recent years. The dual-wavelength pulses output by them can be used in pump-probe experiments. , dual-wavelength mode-locked sapphire lasers, ultra-short pulse wide-spectrum filtering, and dual-injection mode-locked dual-wavelength lasers, etc., based on active mode-locking or dual-wavelength pulse ...

AI Technical Summary

Problems solved by technology

[0004] At present, there are few researches and reports on dual-wavelength polarization rotation mode-locked ytterbium-doped fiber lasers at home and abroad

In 2011, Xiaojun Zhou et al. reported that a long-period phase-shifted grating was inserted into a spatially coupled fully positive dispersion ring cavity as a spectral filter, and nonlinear polarization rotation mode-locked to obtain a maximum output power of 530mW and a pulse energy of 25.76nJ. The mode repetition frequency is 2.499MHz, the pulse width is 310ps, and the center wavelength of the output spectrum is between 1033nm and 1046.6nm. The system adopts the space coupling method, the coupling efficiency is relatively low, and the space coupling equipment is bulky, and the system stability is poor, which is not convenient for practical application.

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