Fig. 1. Optical setup for probing laser emission spectrum

Fig. 2. Photographs of sample under a polarizing microscope. (a) Side face; (b) End face

Fig. 3. White light transmission spectrum of PCF. (a) Unfilled PCF with different detection angles θ; (b) Unfilled PCF and liquid crystal mixture filled PCF, ; (c) Light field distribution in PCF PCF白光透射谱。(a) 探测角度 不同时无填充的PCF样品；(b) 无填充与填充液晶混合物后的PCF样品， ；(c) PCF样品中光场分布

Fig. 4. Laser emission spectra on side face. (a) At different pump energies and; (b) Threshold characteristic curves; (c) At different detecting angles

Fig. 5. Laser emission spectra on end face at different temperatures