A tunable laser based on liquid crystal

Through a tunable laser based on liquid crystal, the refractive index change of liquid crystal and the control of driving electrodes are used to solve the problems of fineness and stability of traditional lasers, and an efficient and easy-to-integrate multi-band laser output is achieved.

CN115241729BActive Publication Date: 2025-03-25SUZHOU UNIV
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Patent Information

Application Number
CN202110438791.6
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2021-04-22
Publication Date
2025-03-25
Estimated Expiration
2041-04-22

AI Technical Summary

Technical Problem

Traditional tunable optical microcavity lasers have shortcomings in terms of fineness, free spectral zone, miniaturization, high efficiency and easy integration, especially the stability of acousto-optical modulation and doped lasers under external influence.

Method used

Using a tunable laser based on liquid crystal, the functions of optical transmission straight waveguide, optical output straight waveguide and resonant cavity are realized through the change of refractive index of the liquid crystal substrate layer and the liquid crystal core layer, combined with the control of the driving electrode, and the functions of optical transmission straight waveguide, light output straight waveguide and resonant cavity are realized, and wavelength tunable is realized.

Benefits of technology

It realizes a laser with a simple structure, high integration, small size, multi-stage cascade, and high output efficiency, which can meet the usage requirements of multiple bands and cover the ultraviolet to near-infrared bands.

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Abstract

The present invention discloses a tunable laser based on liquid crystal, comprising: a pump light source and a photon chip, wherein the photon chip comprises: a liquid crystal substrate layer, a liquid crystal core layer arranged on the surface of the liquid crystal substrate layer, and a driving electrode; the liquid crystal core layer is provided with: a light transmission straight waveguide, the input end of the light transmission straight waveguide is used to input a pump light source; a light output straight waveguide, the output end of the light output straight waveguide is used to output light of any wavelength; a resonant cavity, comprising: one or more mutually cascaded resonant microcavities, the resonant cavity is respectively coupled with the light transmission straight waveguide and the light output straight waveguide through transmission; the driving electrode is used to drive the arrangement change of liquid crystal molecules in the light transmission straight waveguide part, the light output straight waveguide part and the resonant cavity part of the liquid crystal substrate layer, the liquid crystal core layer, and the resonant cavity part, so as to change the refractive index of the corresponding part. The present invention discloses a tunable laser based on liquid crystal, which has a simple structure, a high degree of integration, a small volume, can realize multi-stage cascading, and has high output efficiency.
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