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Polymer cholesteric liquid crystal laser and production method thereof, and optical equipment

A cholesteric liquid crystal and laser technology, applied in the field of lasers, can solve the problems of high laser threshold, low device repeatability, low emission intensity, etc.

Pending Publication Date: 2021-09-10
SOUTH CHINA NORMAL UNIVERSITY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the gain medium of liquid crystal lasers is usually luminescent dyes, such as DCM and PM597, but common luminescent dyes will make the laser threshold of polymer stabilized liquid crystal lasers high and the emission intensity low
Although the newly researched perovskite quantum dot-doped liquid crystal laser can solve the shortcoming of high laser threshold, the dispersibility of doping perovskite quantum dots into cholesteric liquid crystals is usually very poor, and the repeatability of the device is very poor. Low

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  • Polymer cholesteric liquid crystal laser and production method thereof, and optical equipment
  • Polymer cholesteric liquid crystal laser and production method thereof, and optical equipment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] In this embodiment, a polymer cholesteric liquid crystal laser is prepared. The polymer cholesteric liquid crystal laser can output green laser light. The specific preparation process includes:

[0031] S1. Under yellow light conditions, take 93.35 parts by mass of liquid crystal monomer HCM-006, 3.26 parts by mass of chiral dopant RM257, 1 part by mass of surfactant 2-ethyl methacrylate and 1 part by mass of The photoinitiator IRG651 (benzoin dimethyl ether) was dissolved in xylene at 1.1% by mass fraction, stirred evenly for 1 hour at 40°C in a brown bottle, and prepared into a liquid crystal mixture;

[0032]S2. Take a clean and transparent indium tin oxide conductive glass substrate (ITO substrate), spin-coat 5 parts by mass of polyvinyl alcohol aqueous solution, anneal at 60°C for 1 hour, cool down to room temperature, and rub in one direction with a velvet cloth A transparent substrate coated with a polyvinyl alcohol aqueous solution to form a light-transmitting c...

Embodiment 2

[0040] In this embodiment, a polymer cholesteric liquid crystal laser is prepared, which can output blue laser light. The specific preparation process includes:

[0041] S1. Under yellow light conditions, take 93.1 parts by mass of liquid crystal monomer HCM-006, 3.56 parts by mass of chiral dopant RM257, 1 part by mass of surfactant 2-ethyl methacrylate and 1 part by mass of The photoinitiator IRG651 (benzoin dimethyl ether) was dissolved in xylene at 1.1% by mass fraction, stirred evenly for 1 hour at 40°C in a brown bottle, and prepared into a liquid crystal mixture;

[0042] S2. Take a clean and transparent indium tin oxide conductive glass substrate (ITO substrate), spin-coat 5 parts by mass of polyvinyl alcohol aqueous solution, anneal at 60°C for 1 hour, cool down to room temperature, and rub in one direction with a velvet cloth A transparent substrate coated with a polyvinyl alcohol aqueous solution to form a light-transmitting conductive substrate with parallel alignm...

Embodiment 3

[0047] In this embodiment, a polymer cholesteric liquid crystal laser is prepared. The polymer cholesteric liquid crystal laser can output red laser light. The specific preparation process includes:

[0048] S1. Under yellow light conditions, take 95.0 parts by mass of liquid crystal monomer HCM-006, 3.0 parts by mass of chiral dopant RM257, 1 part by mass of surfactant 2-ethyl methacrylate and 1 part by mass of The photoinitiator IRG651 (benzoin dimethyl ether) was dissolved in xylene at 1.1% by mass fraction, stirred evenly for 1 hour at 40°C in a brown bottle, and prepared into a liquid crystal mixture;

[0049] S2. Take a clean and transparent indium tin oxide conductive glass substrate (ITO substrate), spin-coat 5 parts by mass of polyvinyl alcohol aqueous solution, anneal at 60°C for 1 hour, cool down to room temperature, and rub in one direction with a velvet cloth A transparent substrate coated with a polyvinyl alcohol aqueous solution to form a light-transmitting cond...

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Abstract

The invention discloses a polymer cholesteric liquid crystal laser and a production method thereof, and optical equipment. The polymer cholesteric liquid crystal laser comprises a laser main body, and the laser main body comprises a light-transmitting conductive substrate, a polymer cholesteric liquid crystal layer, a precious metal reflecting layer and a resonant cavity unit. A parallel orientation layer is arranged on the light-transmitting conductive substrate; the polymer cholesteric liquid crystal layer is arranged on the surface of the parallel orientation layer; the precious metal reflecting layer and the polymer cholesteric liquid crystal layer are oppositely arranged at an interval; the resonant cavity unit is clamped between the precious metal reflecting layer and the polymer cholesteric liquid crystal layer; and the resonant cavity unit is filled with planar optical waveguides, the planar optical waveguides comprise perovskite quantum dot layers and transparent separation layers, and the transparent separation layers are arranged on the two surfaces, facing the polymer cholesteric liquid crystal layer and the precious metal reflection layer, of the perovskite quantum dot layers respectively. Through the structural design, the polymer cholesteric liquid crystal laser is low in laser threshold, high in radiation intensity and good in repeatability.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a polymer cholesteric liquid crystal laser, a preparation method and an optical device. Background technique [0002] A laser usually consists of three parts: a pump source, a resonant cavity and a gain medium. The gain medium is generally a luminescent dye or a semiconductor luminescent material. The pump source is used as an external energy source to cause the gain medium to generate particle population inversion, and the resonant cavity selects light with a certain frequency and wavelength for gain amplification. When the gain of the generated light is greater than the loss Threshold, the laser can produce laser emission. At present, the most commonly used lasers are semiconductor lasers, but semiconductor lasers have poor temperature characteristics, output light is easy to diverge, and are prone to noise, so they are not suitable for use in some occasions. In contrast, chol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/106H01S3/081
CPCH01S3/1065H01S3/08059H01S3/0813
Inventor 胡小文林炜熙姜小芳周国富
Owner SOUTH CHINA NORMAL UNIVERSITY
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