Optical fluid three-color composite random laser

Abstract

The invention discloses an optical fluid three-color composite random laser which comprises the components of an external pumping optical circuit, a micro-fluidic chip and a precise peristaltic pump. The micro-fluidic chip is obtained through combining a substrate and a cover plate through bonding. A micro-fluidic channel is constructed in the substrate. Cylindrical recessed troughs are constructed at two ports of the micro-fluidic channel. The recessed troughs are communicated with the external surface of the cover plate and are respectively used as a fluid inlet and a fluid outlet. The precise peristaltic pump is connected with the micro-fluidic channel, thereby forming a fluidic loop for circulation of a laser dye. Pumping light which is emitted from the external pumping optical circuit is irradiated into the micro-fluidic channel of the micro-fluidic chip. The light which is emitted from the micro-fluidic chip is random laser which is obtained through combining three colors (red, green and blue). The optical fluid three-color composite random laser has advantages of unidirectional light outlet, high reconfigurability, stable random laser mode and long-time operation. Furthermore because dye solution flow dynamically, dye regeneration is promoted and a no-easy bleaching advantage is realized.

Description

technical field [0001] The invention relates to the field of laser technology, in particular to an optofluid three-color compound random laser. Background technique [0002] In recent years, random lasers have become a hot research field in the international laser community. There are many significant differences between random lasers and traditional lasers in terms of generation mechanism and luminescence characteristics. Random laser radiation originates from activated disordered media, and provides optical feedback through multiple scattering of radiated light in the media, thereby obtaining greater gain without Additional resonator. Random laser radiation can be observed in all directions, and when the viewing angle is different, the spectral line structure and emission intensity will also change, and the luminescence characteristics fluctuate randomly in time, space, and spectrum. Due to its special feedback mechanism, random laser has the advantages of specific worki...

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Problems solved by technology

[0004] Most of the traditional three-color compound random lasers are placed in the cuvette by placing the laser dye and the scattering medium, and using the cascade pumping effect, the white light emitted by the three-color coupling is omnidirectional, which limits its application; in addition, After being pumped by the pump light for a long time, it is easy to cause bleaching of the laser dye, the quantum efficiency is reduced, the quality of the emitted random laser is reduced, and the reconfigurability is poor, so it cannot be operated for a long time

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