Method used for adjusting and controlling outgoing wavelength of random laser through changing thickness

A technology of random lasers and wavelengths, applied in the field of random lasers, can solve the problem that the characteristics of stimulated radiation are not easy to control, etc., and achieve the effects of simple structure, small environmental interference, and convenient production

Inactive Publication Date: 2012-10-31
SOUTHEAST UNIV
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Problems solved by technology

[0006] The purpose of the present invention is to provide a method for controlling the emission wavelength of random lasers by changing the thickness, which can be adjusted by pump

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  • Method used for adjusting and controlling outgoing wavelength of random laser through changing thickness
  • Method used for adjusting and controlling outgoing wavelength of random laser through changing thickness

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0019] Such as figure 1 Shown: A method for adjusting the output wavelength of a random laser by changing the thickness, including the following steps:

[0020] (1) First, place two spacers 2 of different thicknesses on the two ends between the two glass substrates 1 of the random laser respectively to form a wedge-shaped sandwich structure with a gradient thickness change. The thickness range of the above two types of spacers 2 3-300μm;

[0021] (2) pouring the disordered gain medium into the wedge-shaped interlayer;

[0022] The disordered gain medium can be a liquid crystal 3 in which a laser dye solution 4 gain medium is dissolved. At this time, the glass substrate can be subjected to rubbing orientation pretreatment before making a wedge-shaped structure; at the same time, it can be made into a polymer-dispersed liquid crystal with a gr...

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Abstract

The invention discloses a method used for adjusting and controlling the outgoing wavelength of a random laser through changing thickness. The method comprises the following steps of: firstly taking gaskets with different thicknesses to respectively fill on two ends between two glass substrates of the random laser, manufacturing an interfinger structure with thickness gradient variation, wherein the thickness of the two gaskets is in a range of 3-300 mu m; then, filling a disordering gain dielectric in an interfinger, and subsequently utilizing a convergence lens to converge a pump light bundle to a disordering gain dielectric layer of the random laser; and when an optical pumping random laser is in different thicknesses, detecting emergent light of different wavelengths in front and back, and not needing to carry out an adjust and control such as electric field and temperature. The method provided by the invention guarantees the outgoing characteristic of the dynamic adjust and control random laser, with no need of changing the conditions such as ambient temperature, the electric field and illumination, and has the advantages of simple structure, convenience in manufacturing, and low environmental disturbance; and a large area optical pumping is utilized to obtain a laser bean of a width spectrum.

Description

technical field [0001] The invention relates to the technical field of random lasers, in particular to a method for regulating the output wavelength of random lasers by changing the thickness. Background technique [0002] Due to its special feedback mechanism, random laser has the advantages of specific working wavelength, convenient manufacture, and low cost, and has attracted widespread attention due to its potential applications in document coding, identification of friend or foe, flat panel display, integrated optics, and remote temperature sensing. focus on. In disordered gain systems such as semiconductor and laser crystal powders, dye solutions and polymers doped with nanoparticles, dye-infiltrated opals, biological tissues, sintered glass, optical fibers, and liquid crystal materials doped with dyes, when the intensity of multiple scattering is sufficient Increase the travel distance of photons in the gain medium to be greater than the gain length, so that the effe...

Claims

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Application Information

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IPC IPC(8): H01S3/213H01S3/06
Inventor 叶莉华侯聪尹志乐赵翀崔一平
Owner SOUTHEAST UNIV
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