中文摘要：

作者在在 photonic 水晶纤维(PCF ) 制作长时期的栅栏(LPG ) 考察最近的进展。PCF 的新奇轻指导的性质基于如此的 LPG 允许新奇传感器和设备的示范。到温度，紧张和折射索引的这些 PCF LPG 的敏感被讨论并且在常规单个模式的纤维上与 LPG 相比做了。在里面纤维设备象悦耳的乐队拒绝过滤器那样， Mach-Zehnder 干涉仪被讨论。

英文摘要：

The authors review the recent advances in fabricating long-period gratings （LPGs） in photonic crystal fibers （PCFs）. The novel light-guiding properties of the PCFs allow the demonstration of novel sensors and devices based on such LPGs. The sensitivity of these PCF LPGs to temperature, strain and refractive index is discussed and compared with LPGs made on conventional single-mode fibers. In-fiber devices such as tunable band rejection filters, Mach-Zehnder interferometers are discussed.