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High-thermal-stability, high-fatigue-resistance, narrow-half-width and multistable optical tunable laser material

A technology with high thermal stability and fatigue resistance, applied in lasers, nonlinear optics, laser components, etc., can solve problems that affect spectral bandwidth and laser coherence, laser spectral line distortion, and laser can not be effectively stabilized, etc., to achieve excellent The effects of thermal stability, large range of light-induced changes, and large helical torque

Pending Publication Date: 2021-08-10
EAST CHINA UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, liquid crystal optically tunable microcavity lasers have problems of poor thermal stability and low fatigue resistance (Journal of MaterialsChemistry C, 2015, 3(11), 2462–2470); secondly, although they claim to have wavelength tunability, but for The laser emitted by the intermediate state other than the photostable state cannot be effectively stabilized at the corresponding spectral position, that is, the stable intermediate state cannot be obtained, which is essentially a kind of "pseudo-tunability" (Journal of Materials Chemistry C, 2014, 2( 22):4388-4394); In addition, the liquid crystal alignment changes during the tuning process lead to distortion of the laser spectrum line shape, which affects the spectral bandwidth and laser coherence

Method used

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  • High-thermal-stability, high-fatigue-resistance, narrow-half-width and multistable optical tunable laser material
  • High-thermal-stability, high-fatigue-resistance, narrow-half-width and multistable optical tunable laser material
  • High-thermal-stability, high-fatigue-resistance, narrow-half-width and multistable optical tunable laser material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Preparation of an optically tunable laser material with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable state: Mix 2.0mg compound 1o, 0.5mg gain medium DCJTB and 38.0mg commercial common nematic liquid crystal E7 , to obtain optically tunable laser materials with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable states.

[0043] Optically tunable laser description: The above-mentioned optically tunable laser material with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable state is packaged in a liquid crystal cell with a size of 15.13*21mm and a cell thickness of 5 microns. figure 2 It is a schematic diagram of the emission spectrum and the corresponding Bragg emission band of the optically tunable laser material in Embodiment 1 of the present invention. figure 2 In a, when the external excitation light uses ultraviolet light (365nm), the power is 4mW cm -2...

Embodiment 2

[0045] Preparation of an optically tunable laser material with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable state: Mix 2.0mg compound 1o, 0.5mg gain medium DCJTB and 38.0mg commercial common nematic liquid crystal E7 , to obtain optically tunable laser materials with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable states.

[0046] Optically tunable laser description: The above-mentioned optically tunable laser material with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable state is packaged in a liquid crystal cell with a size of 15.13*21mm and a cell thickness of 5 microns. When the external excitation light uses ultraviolet light (365nm), the power is 2mW·cm -2 When the liquid crystal cell is irradiated, the pitch of the liquid crystal system increases with the change of different irradiation times. According to the Bragg equation, the Bragg reflection wavele...

Embodiment 3

[0048] Preparation of an optically tunable laser material with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable state: Mix 2.0mg compound 1o, 0.5mg gain medium DCJTB and 38.0mg commercial common nematic liquid crystal E7 , to obtain optically tunable laser materials with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable states.

[0049] Optically tunable laser description: The above-mentioned optically tunable laser material with high thermal stability, strong fatigue resistance, narrow half-width, and multi-stable state is packaged in a liquid crystal cell with a size of 15.13*21mm and a cell thickness of 5 microns. When the external excitation light uses visible light (405nm), the power is 4mW·cm -2 When the liquid crystal cell is irradiated, the pitch of the liquid crystal system increases with the change of different irradiation times. According to the Bragg equation, the Bragg reflection wavelength...

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Abstract

The invention discloses an optical tunable laser material with high thermal stability, strong fatigue resistance, narrow half width and multistable state. The optical tunable laser material is composed of a diarylethene compound based on an endogenous chiral steric hindrance alkene bridge, a gain medium and a liquid crystal material. The mass ratio of the diarylethene compound based on the endogenous chiral steric hindrance alkene bridge to the liquid crystal material is between 1:200 and 1:18, and the mass ratio of the gain medium to the liquid crystal material is between 1:200 and 1:50; the structure of the diarylethene compound based on the endogenous chiral steric hindrance alkene bridge is shown in the specification. The light tunable laser material with high thermal stability, strong fatigue resistance, narrow half width and multistable state has the light tunable characteristics of high thermal stability, strong fatigue resistance, narrow line width, multistable state and stable spectral line shape, and meanwhile, the output laser spectrum line shape has no obvious change.

Description

technical field [0001] The invention belongs to the field of liquid crystal lasers, and in particular relates to an optically tunable laser material with high thermal stability, strong fatigue resistance, narrow half-width and multi-stable states. Background technique [0002] Laser is a light source with good monochromaticity and high coherence. It is called "the fastest knife", "the most accurate ruler" and "the brightest light". It is widely used in space technology, aviation guidance, micro Nanoprocessing, biomedical and other fields. Simply put, since the electrons in the atom absorb energy and transition from the ground state to the excited state, when the number of particles in the excited state is higher than the ground state, that is, the number of particles is reversed, and the laser amplification occurs; the generated photons are frequency-selected through the resonant cavity , and finally emit a light beam with highly consistent optical properties, which is the ...

Claims

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Application Information

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IPC IPC(8): G02F1/1337G02F1/137H01S3/106
CPCG02F1/137G02F1/133723H01S3/1065
Inventor 朱为宏郑致刚胡宏龙刘炳辉李萌祺李卉君
Owner EAST CHINA UNIV OF SCI & TECH
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