Pulse fiber laser and system of saturable absorber

Abstract

The invention relates to a pulse fiber laser taking a saturable absorber as an intensity modulation device, in particular to the field of lasers. According to the invention, a wavelength division multiplexer is optically connected with a pumping source, an erbium-doped fiber and one end of an output coupler; the other end of the erbium-doped optical fiber, the isolator, the polarization controllerand the optical modulator are optically connected in sequence; the other end of the optical modulator is optically connected with the other end of the output coupler, wherein the saturable absorber of the light intensity modulator is made of iron selenophosphite; and the iron selenophosphite is formed by stacking a plurality of thin layers. Compared with the prior art, the optical modulator prepared from the iron selenophosphate has the advantages that the optical modulator prepared from the iron selenophosphate has excellent light intensity modulation capacity, the pulse time of the pulse optical fiber laser is shorter due to the fact that the iron selenophosphate has a large modulation depth, and the cost of the optical modulator prepared from the iron selenophosphate is lower.

Description

technical field [0001] The invention relates to the field of lasers, in particular to a pulse fiber laser and a system of a saturable absorber. Background technique [0002] Ultrashort pulse lasers are widely used in many fields, such as industrial processing, optical fiber communication, optical microscopy, laser-guided weapons, space ranging, biomedicine and many other fields. Compared with solid-state lasers, dye lasers and other lasers, ultrashort pulse lasers in all-fiber systems have unique advantages such as small size, low thermal effect, low cost, easy assembly, integration, and transportation, so ultrashort pulse lasers in all-fiber systems can be obtained. Pulsed fiber laser is a hot research direction. [0003] In the prior art, in order to realize the output of pulsed light, pulse compression technology is generally used to make the pulse shorter. In the research on how to realize the pulsed output pulsed light of continuous light lasers, it is mainly to make n...

AI Technical Summary

Problems solved by technology

[0005] The object of the present invention is to provide a pulsed fiber laser and system with a saturable absorber in view of the deficiencies in the above-mentioned prior art, so as to solve the problem of using special nanomaterials in the mode-locked laser in the prior art, which requires a relatively high cost. and poor performance

Images