Optical frequency domain reflectometry based fiber Bragg grating vibration sensor array using sinusoidal current modulation of laser diodes
Optical frequency domain reflectometry based fiber Bragg grating vibration sensor array using sinusoidal current modulation of laser diodes
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采用激光二极管正弦电流调制的基于光频域反射的光纤布拉格光栅振动传感器阵列
DOI：
10.1117/12.2194688
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发表时间：
2015
期刊：
影响因子：
--
通讯作者：
and Nobuaki Takahashi
中科院分区：
文献类型：
--
作者：
Atsushi Wada;Satoshi Tanaka;and Nobuaki Takahashi
提出了一种基于光纤光栅和光频域反射技术的多点振动传感方法。在OFDR方法中，阵列传感器的最大数量可以是几千个，并且测量时间由光源的波长扫描速率决定。在我们的传感器系统中，激光二极管被用作波长扫描光源。激光二极管的激射波长可以通过改变其注入电流来调制。使用激光二极管控制器可以在高达1 MHz的高频下精确调制注入电流，然后可以使用激光二极管轻松实现波长扫描。
We present multipoint vibration sensing using fiber Bragg gratings and optical frequency domain refrectometry (OFDR). In OFDR based method, the maximum number of arrayed sensor can be few thousands and the measurement time is determined by wavelength scanning rate of a light source. In our sensor system, a laser diode is used as a wavelength scanning light source. Lasing wavelength of a laser diode can be modulated by changing its injection current. The injection current can be precisely modulated at high frequency up to 1 MHz using a laser-diode controller and wavelength scanning can be then easily achieved with a laser diode.