Mid-infrared spectroscopic detection of refractive index in CO2 laser-written long-period fibre grating
Mid-infrared spectroscopic detection of refractive index in CO2 laser-written long-period fibre grating
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DOI：
10.1049/el:20081489
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发表时间：
2008-09-25
影响因子：
1.1
通讯作者：
Takada, K.
中科院分区：
文献类型：
--
作者：
Hirose, T.;Saito, K.;Takada, K.
提出了一种利用傅里叶变换红外、反射、显微镜测量CO2激光写入长周期光纤光栅折射率调制的方法。观察中红外光谱，检测到1120 cm(-1)附近的峰值位置，该峰值位置与石英玻璃在可见光到近红外频率区域的折射率相关。观察到的反射峰被清楚地调制为具有与记录的光栅相同的周期性。该方法具有吸引人的特点，例如避免复杂的数据处理。测量快速，无需加配套油。
A methods Using Fourier-transform infrared, reflection, microscopy for measuring the refractive index modulation in a CO2 laser-written long-period fibre grating is suggested. A mid-infrared spectrum was observed to detect the peak position around 1120 cm(-1), which was correlated to the refractive index at the visible to near-IR frequency region ill silica glass. The observed reflection peak was clearly modulated to have the same periodicity as that of the recorded grating. This method presents attractive features such its the obviation of complicated data processing. rapid measurement and no need to rise matching oil.