Wavelength-tunable liquid crystal random laser device

A random laser and liquid crystal technology, applied in the field of laser, to achieve the effect of wide application field, narrow spectral bandwidth and small volume

Inactive Publication Date: 2010-10-20
WENZHOU UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] Through searching, at present, the random laser is basically concentrated on the ZnO medium, and there is no report on the application of other media to the random laser

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  • Wavelength-tunable liquid crystal random laser device
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Embodiment Construction

[0016] The present invention is specifically described below by the embodiment, only for further illustrating the present invention, can not be interpreted as the limitation of protection scope of the present invention, the technical engineer of this field can make some non-essential improvements and improvements to the present invention according to the content of the above-mentioned invention Adjustment.

[0017] see Figure 1-4 The specific embodiment of the present invention shown comprises pumping light source 1, and this pumping light source can adopt typical Nd:YAG laser, also comprises the plate type photonic crystal liquid crystal microresonator that links to each other with pumping light source transmission optical fiber 3 Cavity 2, the flat photonic crystal liquid crystal micro-resonator cavity 2 includes a fiber core 21 that is arranged in the center and filled with a nematic liquid crystal scattering medium, and a plurality of circular air holes 22 that are arrang...

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Abstract

The invention discloses a wavelength-tunable liquid crystal random laser device. The wavelength-tunable liquid crystal random laser device comprises a pump light source, flat-plate photonic crystal liquid crystal micro resonant cavity, wherein the flat-plate photonic crystal liquid crystal micro resonant cavity is connected with the pump light source through a transmission optical fiber, and comprises a fiber core and a plurality of round air holes; the fiber core is arranged at the center of the flat-plate photonic crystal liquid crystal micro resonant cavity and is used for filling liquid crystal scattering media; the round air holes are arranged at the periphery of the fiber core; and the liquid crystal scattering media filled in the fiber core are nematic liquid crystals doped with a laser gain medium and scattering particles. The invention has the advantages that the wavelength is tunable, the width of generated laser emission spectral bands is narrow, and the quality factor which can reach above 10000.

Description

technical field [0001] The invention belongs to the field of laser technology, and specifically refers to a liquid crystal random laser with adjustable wavelength and adjustable wavelength. Background technique [0002] In the past ten years, in the research field of random media, people have discovered high-intensity stimulated radiation many times, especially in recent years, Cao et al. from Northwestern University in the United States observed the phenomenon of stimulated radiation in ZnO semiconductor random media , and studied its optical properties, it is considered that the laser phenomenon in random media is closely related to the localization of photons, and the luminescence characteristics of random media are better explained by the ring cavity theory, this kind of stimulated emission in highly disordered media It is significantly different from the stimulated radiation in traditional lasers. People call the lasers formed by using this stimulated radiation random l...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/213H01S3/106
Inventor 钱祥忠
Owner WENZHOU UNIVERSITY
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