Thermal stability of the 248-nm-induced presensitization process in standard H2-loaded germanosilicate fibers.
Thermal stability of the 248-nm-induced presensitization process in standard H2-loaded germanosilicate fibers.
复制标题
标准载氢锗硅酸盐光纤中 248 nm 诱导的预敏化过程的热稳定性。
DOI：
10.1364/ao.41.007197
复制
发表时间：
2002
期刊：
影响因子：
1.9
通讯作者：
I. Riant
中科院分区：
文献类型：
--
作者：
M. Lancry;P. Niay;S. Bailleux;M. Douay;C. Depecker;P. Cordier;I. Riant
在不同的实验条件下，记录了预敏化标准光纤在KrF光下的光栅生长。结果表明，存在一个最佳增感注量，在此注量下增感效率较高。预曝光光纤的等时热退火导致敏化引起的光敏性增强的减少。在纤维或预制板中进行IR吸收光谱以监测归因于相同样品中的含H物种的衰减。在整个温度范围内（110 ℃-800 ℃），退火引起的光敏性衰减与含氢物种的光敏性衰减不相关。这表明光敏性的增强来自于不止一种物种的转化。
Grating growths through exposure of presensitized standard fibers to KrF light were recorded in various experimental condition. It is shown that there exists an optimum sensitization fluence at which the efficiency of the sensitization process is higher. Isochronal thermal annealing of pre-exposed fibers led to a decrease in the sensitization-induced enhancement of photosensitivity. IR-absorption spectroscopy was carried out in fibers or preform plates to monitor the attenuation ascribed to H-bearing species in the same samples. The annealing-induced decay in photosensitivity cannot be correlated with those of the H-bearing species in the whole temperature range (110 degrees C-800 degrees C). This indicates that the enhancement of photosensitivity comes from the transformation of more than one species.