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Random laser, random resonator fabrication and method for detecting the concentration of tiny particles

A random laser and random laser technology, applied in the laser field, can solve the problems of poor output laser controllability, long gain length, high pump power, etc., to achieve controllable output, good gain effect, and reduced pump power Effect

Active Publication Date: 2017-10-13
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] In order to overcome the technical defects that the existing random laser requires a long gain length and high pump power to lase, and the gain is discontinuous, and the controllability of the output laser is poor, the invention provides a random laser and a random resonator in the random laser Manufacturing method and detection method for detecting the concentration of tiny particles using a random laser

Method used

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  • Random laser, random resonator fabrication and method for detecting the concentration of tiny particles
  • Random laser, random resonator fabrication and method for detecting the concentration of tiny particles
  • Random laser, random resonator fabrication and method for detecting the concentration of tiny particles

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specific Embodiment approach

[0045] The invention discloses a random laser, which includes:

[0046] a pump light source 1 for generating a pump light wave;

[0047] Laser mirror 2, used to reflect the pump light wave;

[0048] The capillary 3 is used to receive the pump light wave reflected by the laser mirror 2, provide the pump light wave gain and excite the random laser;

[0049] Dye Solution 5, used to act as a gain medium;

[0050] Filter 6, used to filter the pump light wave;

[0051] The inner wall of the capillary 3 is coated with a layer of nano-TiO 2 A random scattering medium film 4 formed by mixing particles and UV glue, the dye solution 5 is filled inside the capillary 3 to form a random resonant cavity;

[0052] The pump light wave generated by the pump light source 1 is reflected by the laser mirror 2 and then illuminates the random resonator to excite the random laser, which is filtered by the filter 6 after the random laser is output.

[0053] Random laser is a random formation of p...

Embodiment 1

[0083] like figure 1 The random laser shown uses a pump light source 1 with a wavelength of 532 nm, a laser mirror 2 and a filter 6, the dye solution 5 is an aqueous solution of rhodamine 6G, and the capillary 3 is a 1017Q capillary with an inner diameter of 100um and an outer diameter of 100 μm. 170um, random scattering dielectric film 4 is nano-TiO 2 A mixture of particles and UV glue.

[0084] First, TiO was verified by two experiments 2 The role of particles:

[0085] The first one: only a thin layer of UV glue is coated on the inner wall of the capillary, cured by UV lamp irradiation, and the dye solution is filled at a constant speed through the control of a micro-injection pump. The dye solution is an aqueous solution of rhodamine 6G, wherein the filling matrix is ​​deionized water, the gain medium is rhodamine 6G, and the concentration of the rhodamine solution is 1 mol / L. exist figure 1 Observing the spectrogram in the random laser, only the fluorescence spectrum...

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Abstract

The invention discloses a random laser, comprising: a pumping light source; a laser reflector; a capillary; a dye solution; an optical filter; The dye solution is filled inside the capillary to form a random resonant cavity; the pump light wave generated by the pumping light source is reflected by the laser mirror and irradiates the random resonant cavity to excite the random laser, which is filtered by an optical filter after outputting the random laser. The invention also discloses a manufacturing method of the random resonant cavity and a method for detecting the concentration of tiny particles. The inner wall of the resonant cavity of the random laser of the present invention is coated with a random dielectric thin film mixed with nano-TiO2 particles and ultraviolet glue. Under the action of multiple scattering, the residence time of light in the gain medium is increased, the gain length is reduced, and the response to the gain is enhanced. The amplification of light, the gain is greater than the loss, reduces the pump power, and realizes the controllable output of random laser.

Description

technical field [0001] The invention relates to a random laser, belonging to the field of lasers, in particular to a random laser, a method for manufacturing a random resonant cavity in the random laser, and a method for detecting the concentration of tiny particles by using the random laser. Background technique [0002] Since Letokhov theoretically predicted the existence of random lasers (RLS), RLS has received increasing attention due to its unique properties. In contrast to conventional lasers, which require cavities formed by fixed mirrors, RLS relies only on an active medium and a scattering medium, where optical feedback is achieved by multiple light scattering. Light undergoes multiple scattering before escaping from the gain medium. Multiple scattering increases the residence time of light in the gain medium (that is, increases the distance that light travels in the gain medium), enhancing the amplification of light. In this case, additional mirrors are no longer...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/08H01S3/10G01N15/06
Inventor 张伟利郑梦雅马瑞饶云江宋云波
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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