Double steady interval adjustable round bistable state erbium-doped optical fiber laser

Abstract

The invention provides a circumduction bistable erbium-doped fiber laser adjustable in bistable region which belongs to optoelectronic device field. The laser includes: first pumped source, first WDM coupler, 10/90 fiber coupler, gain section erbium-doped fiber, second pumped source, third WDM coupler, absorption section erbium-doped fiber. First pumped source connects with first WDM coupler, first WDM coupler connects with gain section erbium-doped fiber, gain section erbium-doped fiber connects with second WDM coupler, second WDM coupler educes unfinished pumped light from circumduction cavity, second WDM coupler connects with third WDM coupler, second pumped source connects with absorption section erbium-doped fiber via third WDM coupler, absorption section erbium-doped fiber connects with 10/90 fiber coupler, 10/90 fiber coupler connect with first WDM coupler. Absorption section erbium-doped fiber leads to optical bistable phenomenon and can adjust optical bistable region size.

Description

technical field [0001] The invention relates to a device in the field of laser technology, in particular to a circular bistable erbium-doped fiber laser with an adjustable bistable range. Background technique [0002] Optical bistability is a new nonlinear optical phenomenon that attracted people's attention 15 years after the invention of laser. Optical bistability has important applications in optical communication, optical computing, optical sensing, and laser intensity control technology. Compared with electronic devices, optical bistable devices not only have similar functions, but also have many superior characteristics, such as anti-electromagnetic interference and fast response speed. In recent years, with the development of fiber optic technology, optical bistability in fiber lasers has gradually become a research hotspot. [0003] A paper "Optical Bistability in an L-Band Dual-Wavelength Erbium-Doped Fiber Laser With Overlapping Cavities" (L-segment dual-wavelen...

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Problems solved by technology

[0003] A paper "Optical Bistability in an L-Band Dual-Wavelength Erbium-Doped Fiber Laser With Overlapping Cavities" (L-segment dual-wavelength compound cavity erbium-doped fiber laser optical bistability phenomenon) proposed to adjust the optical fiber laser by controlling the cavity loss The size of the bistable interval, this method expands the size of the bistable interval by increasing the loss in the cavity, but it will bring some efficiency problems

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