研究了掺杂激光染料DCM和手性剂CB15的向列相液晶器件的激光辐射行为。制作了反平行摩擦处理的器件,得到了扭曲向列相液晶平面织构态。采用固体Nd:YAG倍频532 nm波长激光作为抽运光源,测量并分析了器件的受激辐射光谱。当抽运光较弱,小于18.0 mJ时,观察到染料DCM较宽的荧光辐射谱。随着抽运光的逐渐增强,以波长606 nm为中心出现了较尖锐的受激辐射峰,具有明显的阈值特性和方向性。最小半峰全宽(FWHM)大约为10 nm。

We investigate the lasing action of the nematic liquid crystal device,which is added laser dye DCM and chiral compound CB15. The anti-parallel rubbing device is manufactured and the planar texture state of cholesteric liquid crystal is achieved. The emission spectra is mesured and anylazed using a frequency-doubled Nd:YAG pulsed laser (λ=532 nm) as pumping source. Broad fluorescence radiation spectra of DCM is observed under lower pumping energy. When pumping energy is larger than 18.0 mJ,dramatic narrowing spectra which has the obvious threshold and the direction characteristics is observed with centre wavelength of 606 nm. The full width at half maximum (FWHM) is about 10 nm.