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

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 ...

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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

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