APPARATUS AND METHOD OF DISTRIBUTED FIBER SENSOR USING BRILLOUIN OPTICAL TIME DOMAIN ANALYSIS BASED ON BRILLOUIN DYNAMIC GRATING

摘要

PURPOSE: A distributed optical fiber sensor device and method are provided to make exact brillouin transition frequency detection using the time domain analysis of a dynamics lattice of brillouin. CONSTITUTION: A distributed optical fiber sensor device comprises a pump light source(110), an optical splitter(120), a polarization maintaining optical fiber(150), a probe light source(160), and an optical detector. The pump light source generates pump light. The optical splitter distributes the pump light into a first pump light and a second pump light. The first pump light and the second pump light come to the polarization maintaining optical fiber at the same axle in the opposite direction. The optical detector detects the probe reflection light generated from the polarization maintaining optical fiber.