Pulsed fiber laser and system with saturable absorber

Abstract

The invention relates to a pulse fiber laser using a saturable absorber as an intensity modulation device, in particular to the field of lasers. In this application, the wavelength division multiplexer is optically connected to the pump source, one end of the erbium-doped optical fiber and the output coupler respectively, and the other end of the erbium-doped optical fiber, the isolator, the polarization controller and the optical modulator are optically connected in turn, and the optical modulator The other end is optically connected to the other end of the output coupler, wherein the material of the saturable absorber of the light intensity modulator is iron selenide phosphite, because iron selenide phosphite is stacked by multiple thin layers, and has Relatively high electron mobility, which makes the optical modulator made of iron selenide phosphite have excellent light intensity modulation ability, and because the iron selenide phosphite has a large modulation depth, the pulsed fiber laser The pulse time is shorter, and the light modulator made of iron selenide phosphite is lower cost.

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...

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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

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