首页>
外国专利>
Optical fiber strain measurement apparatus and optical fiber strain measurement method comprising a transmitter-side optical bandpass filter
Optical fiber strain measurement apparatus and optical fiber strain measurement method comprising a transmitter-side optical bandpass filter
展开▼
机译:包括发送器侧光学带通滤波器的光纤应变测量装置和光纤应变测量方法
展开▼
页面导航
摘要
著录项
相似文献
摘要
Object is to enable a directly-modulated semiconductor laser to be applied as a light source of probe light. A transmission unit configured to generate probe light; and a reception unit including a receiver-side optical bandpass filter that extracts a Stokes component of Brillouin backscattered light from backscattered light which is caused by the probe light in a measurement target optical fiber, and a self-delayed heterodyne interferometer that detects a change in a frequency shift amount of the Stokes component as a phase difference are included. The transmission unit includes a directly-modulated light source configured to generate an optical pulse, and a transmitter-side optical bandpass filter provided in a stage following the directly-modulated light source, and configured to transmit wavelength of an ON level of the optical pulse as the probe light, and block wavelength of an OFF level.
展开▼