Improvement of Bandpass Filter Response by Aligning LP11 Mode Between In-Line Fiber Gratings
Improvement of Bandpass Filter Response by Aligning LP11 Mode Between In-Line Fiber Gratings
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通过对齐在线光纤光栅之间的 LP11 模式来改善带通滤波器响应
DOI：
10.1109/lpt.2017.2722439
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发表时间：
2017
影响因子：
2.6
通讯作者：
Kanda M.
中科院分区：
文献类型：
--
作者：
Sakata H.;Kibune T.;Kanda M.
在渐变折射率双模光纤和阶跃折射率双模光纤中串联形成力致长周期光纤光栅，构成全光纤带通滤波器。通过调整在同轴双模光纤中传播的LP 11模的方向，滤波器响应的通带透射率和带宽被细化。滤波器通带在1450 ~ 1650 nm范围内单独出现，峰值透过率为-2.2 dB，半峰全宽带宽为17 nm。该器件方案可应用于各种光纤器件，包括全光纤可调谐光纤激光器、波长选择滤波器和光纤传感器。
Force-induced long-period fiber gratings are formed in a graded-index two-mode fiber and a step-index two-mode fiber in series to build an all-fiber bandpass filter. The passband transmittance and bandwidth in the filter response are refined by adjusting the orientation of the LP11mode traveling through the in-line two-mode fibers. The filter passband singly appeared over 1450 to 1650 nm with a peak transmittance of -2.2 dB and a full-width half-maximum bandwidth of 17 nm. This device scheme can be applied for various fiber components, including all-fiber tunable fiber lasers, wavelength-selective filters, and fiber-optic sensors.