Semi-open cavity random fiber laser with low threshold

A fiber laser, semi-open cavity technology, applied in the field of low-threshold random fiber lasers, can solve the problems of high-order random laser output difficult to achieve, application impact, weak fiber Rayleigh scattering, etc., achieving simple structure, tunable wavelength, hybrid output simple effect

Inactive Publication Date: 2013-10-30
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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Problems solved by technology

[0003] As an important new light source, randomly distributed feedback fiber laser has broad potential application prospects in the fields of optical communication and optical sensing. However, due to the very weak Rayleigh scattering in the opt

Method used

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  • Semi-open cavity random fiber laser with low threshold
  • Semi-open cavity random fiber laser with low threshold
  • Semi-open cavity random fiber laser with low threshold

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Embodiment 1

[0027] figure 2 is the output spectrum of a low-threshold random fiber laser with a semi-open cavity, and the corresponding random fiber laser structure is as follows figure 1 shown. Among them, the wavelength of the pump light source (1) is 1366nm, and figure 2 The pump powers corresponding to (a) and (b) are 0.701W and 0.911W respectively, and the pump light passes through the 1365 / 1461nm wavelength division multiplexer WDM (3) and is coupled to the standard single-mode fiber (6) by the front end , the center wavelength of the fiber grating (4) connected to the WDM common end (9) of the wavelength division multiplexer is 1454nm, and its reflectivity is 0.979. First-order random laser output with a wavelength of 1454nm.

[0028] image 3 is another output spectrum diagram of a low-threshold random fiber laser with a semi-open cavity, and the corresponding random fiber laser structure is as follows figure 1 shown. image 3 (a) and (b) respectively correspond to the fir...

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Abstract

The invention discloses a semi-open cavity random fiber laser with a low threshold. An optical wave is coupled into a standard single mode fiber (6) from a front end by a pump source (1) of the semi-open cavity random fiber laser through a wavelength division multiplexer WDM (3). A common terminal (9) of the wavelength division multiplexer WDM (3) is connected with a high-reflectivity fiber grating (4) with a specific central wavelength. A feedback in the fiber laser is provided by a randomly distributed Rayleigh scattering (10) and a fiber grating feedback (5). A tail end (7) of the optical fiber is an output end of the laser. The semi-open cavity random fiber laser with a low threshold provided by the invention has characteristics such as tunable wavelength, multi-order random laser mixed output, and simple structure. The semi-open cavity random fiber laser with a low threshold provides a new development method for related optical devices and systems, and facilitates further promotion of the application of a feedback-randomly-distributed fiber laser in the fields of optical sensing and optical communication.

Description

technical field [0001] The invention relates to the field of novel fiber lasers, in particular to a semi-open-cavity low-threshold random fiber laser. Background technique [0002] Random laser is a new type of laser formed by multiple scattering amplification of light in a random gain medium. Because of its compact structure, small size and simple fabrication, it has attracted extensive attention in recent years. In order to improve the instability of the output direction and mode of random lasers, people use low-dimensional random system structures to make random fiber lasers with optical fibers as gain media, and use the waveguide structure of optical fibers to ensure the directionality of laser beams. [0003] As an important new light source, randomly distributed feedback fiber laser has broad potential application prospects in the fields of optical communication and optical sensing. However, due to the very weak Rayleigh scattering in the optical fiber, its operation s...

Claims

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Application Information

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IPC IPC(8): H01S3/067
Inventor 张伟利饶云江朱俊梅杨自新
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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