Femtosecond mode-locked pulsed optical fiber laser based on single-walled nanotube

Abstract

The invention discloses a dispersion management type femtosecond mode-locked pulsed optical fiber laser based on a single-walled nanotube. The dispersion management type femtosecond mode-locked pulsedoptical fiber laser comprises a pumping source and a laser annular chamber formed by a wavelength division multiplexer, an ytterbium-doped single-mode gain optical fiber, two optical fiber couplers,three optical fiber collimators, four high-reflection mirrors, four transmission gratings, a polarization-independent optical isolator, a polarization controller, a saturable absorbing device, a single-mode optical fiber, and a spatial optical path, and the overall optical path is divided into two portions including a laser resonant cavity and an outside-cavity compressor. According to the laser,mode-locked femtosecond pulsed laser of mode-locked laser output, direct output of 450 fs, and outside-cavity compression output of 198 fs can be realized on the single-mode ytterbium-doped gain optical fiber, a feasible scheme is provided for acquisition of narrow-pulse-width laser of a saturable absorber based on a novel material, the structure is simple and small, the cost is low, the pulse output with high repetition rate and direct femtosecond level is achieved, the laser can be widely applied to the fields of scientific research and industries etc., and the application prospect and the business value are good.

Description

technical field [0001] The invention belongs to the technical field of lasers and relates to fiber lasers, in particular to a dispersion-managed femtosecond mode-locked pulse fiber laser based on single-walled carbon nanotubes. Background technique [0002] Since the birth of the world's first ruby ​​laser in 1960, the development of lasers has been promoting the continuous development of all aspects of science and society. Especially in recent years, with the emergence of fiber lasers with compact structure, excellent stability, low cost, excellent heat dissipation effect, and high photoelectric conversion efficiency, the field of fiber lasers has attracted great attention and interest from researchers. Among them, the ytterbium-doped fiber laser using semiconductor laser as the pump source has attracted much attention due to its wide absorption gain spectrum, high conversion efficiency, easy realization of mode locking and output light in the communication band. [0003] ...

AI Technical Summary

Problems solved by technology

However, in the current research, in the field of mode-locked fiber lasers based on new material saturable absorbers, only the construction and research of fully positive dispersion dissipative soliton lasers in the 1 micron band are involved. The acquisition of pulse-width pulsed lasers, on the other hand, a single soliton type also greatly limits the demand for mode-locked fiber lasers based on new saturable absorbers in other fields for single-walled carbon nanotube ytterbium-doped lasers with multiple soliton types, Therefore, it is imminent to manage the dispersion to obtain ultrashort pulse lasers with narrow pulse width

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