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

A random laser and single-mode fiber technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of difficult output of high-order random lasers and high threshold pump power, and achieve the control of output power and spectrum. Flexible optimization, low pump threshold, and stable output

Inactive Publication Date: 2013-11-20
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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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 random laser output is difficult. On the other hand, by adjusting the length and position of special optical fibers, the characteristics of random laser power distribution and output spectrum can be effectively designed and controlled to better serve its optical transmission, optical amplification and optical sensing. Applications

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

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0016] exist figure 1 Among them, the pump light source 1 couples the light wave from the front end to the standard single-mode fiber 5 and the special fiber 6 through a port 2 of the WDM3, thus providing random feedback and gain, and the fiber end 7 is the output port of the random laser; if it is also connected With the Fiber Bragg Grating FBG4, the feedback in the fiber laser is provided by the Fiber Bragg Grating FBG4 together with the randomly distributed Rayleigh scattering in the standard single-mode fiber 5 and the dispersion compensating fiber 6 .

[0017] figure 2 The laser output power diagram of an embodiment of the fiber random laser is given. Among them, the wavelength of the pump light source 1 is 1366nm, the pump power changes gradually from low to high, the pump light passes through the WDM3 of 1365 / 1461nm, and the common te...

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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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Application Information

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IPC IPC(8): H01S3/067H01S3/13
Inventor 饶云江张伟利朱叶雨王子南
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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