The fiber Bragg grating (FBG) is a passive optical fiber component with the refractive index modulated along the fiber length and has been widely applied in fiber sensing systems. High-temperature stable fiber gratings are promising for uses at high temperatures and attract extensive attention. In this paper, FBGs were inscribed in hydrogen loaded standard single mode fibers with the 248-nm excimer laser, and regenerated gratings were obtained through heat treatment. The shift of the central wavelength of the regenerated FBG had a good linearity with temperature, and the reflectivity of the regenerated FBG could almost keep unchanged at 800 ℃.

拉丝塔在线制作光纤布拉格光栅(FBG)可以在单根光纤上制作无焊点串接的FBG阵列，有利于构建大规模的传感网络。尝试用相位掩模方法在拉丝塔上在线制作FBG，使用这种方法可以精确地控制所制作FBG的布拉格波长。针对相位掩模制作FBG的特点以及拉丝塔在线制作FBG的要求，研制了一套拉丝塔在线制作FBG的装置，使用此装置在拉丝塔上进行了实验，在线制作出由164个无焊点串接的FBG构成的FBG阵列。

We investigate the on-line writing identical fiber Bragg grating (FBG) arrays using the phase mask technique. Given the limitation of laser power, the energy density uniformity and the horizontal width of the writing spot cannot be further optimized. The results show that the FBG arrays obtained in the optimal process (drawing speed of 12 +(-) 0.15 m/min and average tension of 38.2 g) have a central wavelength bandwidth of less than 0.1 nm and an average reflectivity of 0.26%. Thus, the phase mask method is a promising alternative for on-line writing identical FBG arrays.

综述了近年来, 特别是近两年来国内外透明Nd:YAG激光陶瓷的研究与应用情况, 重点对我国的透明Nd:YAG激光陶瓷研究近况进行了分析, 指出了透明Nd:YAG激光陶瓷是目前陶瓷研究的热点。提出了透明Nd:YAG激光陶瓷研究中尚存在的问题和我国在此领域中与国外研究的巨大差距。分析指出：我国研究透明Nd:YAG激光陶瓷的各个院所之间, 应该强强联合, 优势互补, 对该领域的理论和制备工艺进行更为深入的研究。