Active ring resonator-based single longitudinal mode low noise narrow band column vector fiber laser

Abstract

The invention discloses an active ring resonator-based single longitudinal mode low noise narrow band column vector fiber laser. The single longitudinal mode low noise narrow band column vector fiber laser comprises a pumping source, a wavelength division multiplexer, a gain fiber, an isolator, a coupler, a seed source, a first optical circulator, a second optical circulator, a single-mode fiber, a few-mode fiber engraved with a grating, a first polarization controller and a second polarization controller which are connected with one another in a closed end-to-end manner through a fiber coupling way to form a ring optical fiber resonator. The components of the single longitudinal mode low noise narrow band column vector fiber laser adopts an all-fiber coupling mode; the structure is compact, the polarization purity of output column vector laser is high, the coherence is well, a single longitudinal mode working manner is realized, and the spectrum stability is high.

Description

technical field [0001] The invention relates to the field of fiber lasers, in particular to a single longitudinal mode low-noise narrow-band cylindrical vector fiber laser based on an active ring cavity. Background technique [0002] Due to its symmetrical polarization and intensity characteristics, cylindrical vector light is widely used in material processing, optical tweezers, sensing and other fields. The research on cylindrical vector fiber lasers that use all-fiber methods to excite high-order modes and obtain cylindrical vector light has become a research hotspot in recent years. . At present, most studies use grating-engraved few-mode fiber as the transverse high-order mode selection unit, combined with mode-locking technology or Q-switching technology to obtain pulse column vector fiber laser output in the communication band, and how to obtain high coherence in the communication band , continuous light output narrowband single longitudinal mode cylindrical vector f...

AI Technical Summary

Problems solved by technology

At present, most studies use grating-engraved few-mode fiber as the transverse high-order mode selection unit, combined with mode-locking technology or Q-switching technology to obtain pulse column vector fiber laser output in the communication band, and how to obtain high coherence in the communication band , continuous light output narrowband single longitudinal mode cylindrical vector fiber laser has not been reported, but there is an urgent demand for this type of light source in the fields of laser processing, optical fiber communication and optical fiber sensing

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