Random fiber laser for hybrid of a special fiber and a standard single mode fiber

Abstract

The invention discloses a random fiber laser for hybrid of a special fiber and a standard single mode fiber, which belongs to the technical field of novel lasers, and comprises a pump light source, a wavelength division multiplexing device WDM provided with three ports, and the special fiber, wherein the pump light source, the wavelength division multiplexing device WDM, the standard single mode fiber, and the special fiber are connected in sequence; an open resonant cavity is formed by the standard single mode fiber and the special fiber, so that a random resonant mode is formed; pump light emanated by the pump light source is coupled with the standard single mode fiber and the special fiber through the wavelength division multiplexing device WDM to obtain strong rayleigh scattering and high Raman gain, when the gain is greater than the loss, random laser output is realized at the fiber tail-end. The random fiber laser has the characteristics of low pump threshold value, tunable wavelength, stable output, and simple structure, which provide a new way for the development of related optical devices and systems, and meanwhile facilitate the further pushing of the application of the random distributed feedback fiber laser in the field of optical sensing, optical communication, and the like.

Description

technical field [0001] The invention belongs to the field of novel laser technology, and relates to a fiber random laser in the field, in particular to a fiber random laser in which a special fiber and a standard single-mode fiber are mixed. Background technique [0002] A random laser is a device that uses multiple scattering of disorderly distributed scatterers in the gain medium to form a closed feedback loop, that is, an oscillation mode, to achieve light emission. It has a simple structure, flexible shape, coherent time domain, and incoherent space domain. Display, light sensing and light imaging and other fields have excellent application prospects. It is a very new topic to use the disorder of the fiber itself to realize random laser. In 2010, Turistsyn et al. of Aston University in the United Kingdom used the Rayleigh scattering effect of standard single-mode fiber as the feedback mechanism and combined with Raman amplification to realize random distributed feedback ...

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Problems solved by technology

[0003] In view of the above-mentioned status quo, the object of the present invention is to provide a kind of fiber stochastic laser which is simple in structure and easy to realize, which mixes special fiber and standard single-mode fiber, which aims to solve the problem of high threshold pump power and high order The problem of

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