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Method of acquiring Raman laser based on in-fiber micro cavity

A Raman laser and micro-technology, applied in the laser field, achieves the effect of simple structure and low cost

Inactive Publication Date: 2016-02-03
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the use of Raman scattering effect of optical fiber to obtain laser has the following disadvantages: 1. High-power pump source is required
2. A longer optical fiber is required as a gain medium

Method used

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  • Method of acquiring Raman laser based on in-fiber micro cavity
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  • Method of acquiring Raman laser based on in-fiber micro cavity

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Experimental program
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Embodiment Construction

[0013] Such as Figure 1a and Figure 1b As shown, this embodiment includes a wavelength-tunable pump laser 1 and an in-fiber microcavity device 2 .

[0014] The specific method for obtaining Raman laser includes the following steps:

[0015] (1) Choose a pump laser 1 with tunable wavelength, whose output wavelength is tunable in the range of 1500nm to 1600nm, and output power is 10mW; choose an in-fiber microcavity device 2, and use commercialized D-type fiber 3 as The substrate is not more than 30 microns away from the core 4, and is engraved with a microcavity 5 on the same plane as the core 4. The microcavity 5 is a microdisk cavity, and the distance between the edge of the microcavity 5 and the core 4 is 0.5 microns.

[0016] (2) Connect the wavelength-tunable pump laser 1 to an optical fiber at one end of the fiber microcavity device 2; the other end of the fiber microcavity device 2 is used as a Raman laser output port.

[0017] (3) Turn on the pump laser 1 with tunab...

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Abstract

The invention discloses a method of acquiring Raman laser based on an in-fiber micro cavity. The method is applied to fiber laser acquisition. Coupling between a micro cavity on a D-type fiber and a fiber core is used for realizing high light intensity inside the micro cavity, and Raman laser is generated based on Raman scattering effects. No high-power pumping light source or a long-distance Raman gain fiber is needed, and the structure is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a method based on obtaining Raman laser in a fiber microcavity. Background technique [0002] Laser is one of the greatest discoveries of the 20th century, which has had a huge impact on people's life and production. Fiber laser is the most advanced laser in the field of laser technology. It has the advantages of compact structure, fiber compatibility, low threshold, high efficiency, high beam quality and strong controllability of laser spectrum. It has been widely used in industrial processing, biomedicine, lighting, etc. , defense industry and other fields. There is a special effect in the scattering phenomenon of optical fibers, the frequency of light will change after scattering. Optical fiber Raman scattering means that when a certain frequency of laser light is transmitted through the optical fiber, the molecules in the substance absorb part of the energy and v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/108H01S3/067
Inventor 陈达如李海涛王晓亮
Owner ZHEJIANG NORMAL UNIVERSITY