Dual wavelength dissipative soliton mode-locked laser

Abstract

The invention provides a dual-wavelength dissipative soliton mode-locked laser, which relates to the field of laser technology and solves the problem that existing devices are realized by spatial coupling. The coupling efficiency of the system is relatively low, the spatial coupling equipment is bulky, and the system stability is poor, which is not convenient for practical use. application problem. The present invention includes a wavelength division multiplexer, a gain fiber, an isolator and a coupling output element, wherein it also includes a bandpass filter, a first polarization controller and a second polarization controller, a wavelength division multiplexer, a gain fiber, a band The pass filter, the first polarization controller, the isolator, the second polarization controller and the coupling output element are connected in sequence by optical fibers to form an all-fiber ring cavity, and the length of the gain fiber is such that it has both four-level oscillation and three-level The length of the vibration. The invention adopts a double-end pumping mode, an all-fiber ring cavity structure, a band-pass filter is inserted in the cavity, and a polarization rotation mode-locking mode is adopted to realize stable dual-wavelength laser output.

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.

Images