将掺杂激光染料DCM 的手性向列相液晶注入全反射型光子晶体光纤微孔中，研究了激光辐射行为。采用固体Nd∶YAG 倍频532 nm 激光作为抽运光，室温下，在各个方向上均能探测到随机激光辐射谱。当抽运光的入射方向与样品轴向成30°，光纤光谱仪沿样品轴向方向以及垂直样品轴向方向探测时，在600~650 nm 范围内不同波段测得多个离散的尖锐随机激光辐射峰，其线宽约为0.2~0.3 nm。当加热样品至各向同性温度时，激光辐射峰消失。光子晶体光纤的微孔中，作为较强散射介质的手性向列相液晶在不同温度下呈现不同分子取向和折射率分布，这是随机激光产生和关闭的根本原因。

The random laser radiation is researched by filling the air hole of photonic crystal fiber with dyedoped DCM chiral nematic liquid crystal. At room temperature, by using doubled frequency 532 nm Nd∶YAG laser as optical excitation, the emission spectrum of random laser can be detected in all directions. When the angle between the incident direction of the laser and the axial direction of the sample is 30°, the random laser radiation is obtained in the horizontal direction and vertical direction and a plurality of discrete and sharp random laser radiation peak can be measured in the range from 600 nm to 650 nm, with the line- width of multi- mode peaks less than 0.3 nm. When the sample is heated up to the isotropic temperature, the laser radiation peaks disappear. Among the photonic crystal fiber, the chiral nematic liquid crystal as a strong scattering medium exhibits different molecular orientations and refractive index distributions at various temperatures, which is the fundamental cause of the random laser generation and disappearance.