PULSE LASER GENERATOR AND OPTICAL FIBER SENSOR SYSTEM USING SAME

摘要

Disclosed are a pulse laser generator and an optical fiber sensor system using the same. The optical fiber sensor system includes a main optical coupler that receives pulse laser light generated from a pulse laser generator from a first input terminal, branches the light to first and second output terminals to output, and outputs, through a third output terminal, light input reversely from the first and second output terminals, a reference optical fiber that is connected to the first output terminal, a multi-point sensing optical fiber unit that is connected to the second output terminal, and in which optical fibers are connected in series or in parallel corresponding to a plurality of sensing points, an optical detection unit that is connected to the third output terminal, and a diagnosis processing unit that detects a change of the physical quantity for the sensing points from signals from the optical detection unit.

主权项

1. An optical fiber sensor system using a pulse laser, comprising:
a pulse laser generator that generates and outputs pulse laser light; a main optical coupler that receives the pulse laser light generated and outputted from the pulse laser generator from a first input terminal, branches the received light to a first output terminal and a second output terminal to output the branched light, and outputs, through a third output terminal, light input reversely from each of the first output terminal and the second output terminal; a reference optical fiber that is connected to the first output terminal and reflects light input through the main optical coupler to provide a reference optical signal, and extends by a predetermined length as an optical fiber; a multi-point sensing optical fiber unit that is connected to the second output terminal, and in which optical fibers are connected in series or in parallel corresponding to a plurality of sensing points so as to measure a physical quantity to be measured for each of the plurality of sensing points; an optical detection unit that converts an optical signal input through the third output terminal into an electrical signal; and a diagnosis processing unit that detects a change of the physical quantity which is set for the sensing points from a signal output from the optical detection unit.