We present a loss-reduced photonic liquid-crystal fiber (PLCF) using the noncontact photoalignment method. The photoexcited and adsorbed azo dye on the capillary surface of a PLCF induces uniform and highly ordered orientation of the liquid crystal (LC). The anchoring force of the photoalignment effect is combined with that generated by surface boundary conditions of the photonic crystal fiber (PCF). Transmission loss resulting from LC scattering can be reduced from -2.8 to -1.3 db/cm within 10 min. This photoinduced alignment yields a permanent boundary for the LC in the PCF that reduces scattering loss and can be further modulated by electrical fields. The electrical tunable effect and fast dynamic response of the photoaligned PLCF are also presented. This low-loss PLCF can be applied conveniently in various PLCF devices.
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机译：我们提出了一种使用非接触光对准方法的降低损耗的光子液晶光纤（PLCF）。 PLCF的毛细管表面上的光激发和吸附的偶氮染料会引起液晶（LC）的均匀且高度有序的取向。光取向效应的锚定力与光子晶体光纤（PCF）的表面边界条件所产生的锚定力相结合。 LC散射导致的传输损耗可以在10分钟内从-2.8降低到-1.3 db / cm。这种光致对准产生了PCF中LC的永久边界，该边界降低了散射损耗，并可以通过电场进一步调制。还介绍了光取向PLCF的电可调效应和快速动态响应。这种低损耗的PLCF可以方便地应用于各种PLCF设备中。
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