Low-cost tunable lasers have broad application prospects in optoelectronics. In this paper, a laser device based on fingerprint-textured cholesteric liquid crystal (CLC) was designed and fabricated, in which a narrow linewidth single-mode laser output on the side of the device was realized. The planar helical structure of the “fingerprint-texture” of CLC was obtained by the combined effect of externally applied electric field and substrate surface anchoring. Under the pumping light of a Nd:YAG solid-state pulsed second harmonic laser with the wavelength of 532 nm, the lasing emission wavelength of our CLC device changes non-monotonically with gradually increasing electric field, which first shifting from 568.5 nm to 609.2 nm and then shifting from 609.2 nm to 586.2 nm. And the observed spectral tuning of the lasing emission was reproducible and reversible. The analysis shows that the output laser radiation was the result of the Bragg reflection feedback provided by the fingerprint-texture.

低成本的可调谐激光器在光电子领域具有广阔的应用前景。本文设计并制作了一种基于指纹纹理胆甾型液晶（CLC）的激光器件，实现了器件侧面的窄线宽单模激光输出。CLC“指纹纹理”的平面螺旋结构是通过外加电场和基板表面锚定的综合作用获得的。在波长为 532 nm 的 Nd:YAG 固态脉冲二次谐波激光器的泵浦光下，我们的 CLC 器件的激光发射波长随着电场的逐渐增加发生非单调变化，首先从 568.5 nm 移动到 609.2 nm然后从 609.2 nm 转移到 586.2 nm。并且观察到的激光发射光谱调谐是可重复和可逆的。分析表明，输出激光辐射是指纹纹理提供的布拉格反射反馈的结果。