| 摘要 |
PURPOSE:To simplify the station constitution by using an induced Brillouin scattering light caused by a light led from a transmission light source in an optical transmission light as a local oscillated light so as to eliminate the local oscillation source. CONSTITUTION:A light from a transmission light source 12 of a master station 11 modulated by a modulator 13 is led to an optical transmission line 16 via a photocoupler 15 and led to a photodetector 20 of the slave station via an optical coupler 17. An output light of a transmission light source 19 of the slave station 21 is received by the photodetector 14 of the master station via the modulator 18, the optical coupler 17, the optical transmission line 16 and the photocoupler 15. The system is switched into the 1st state sending a signal light from the master station 11 to the slave station 21 and the 2nd state sending the signal light to the master station 11 from the slave station 21 in time series. Since the detectors 14, 20 of the stations 11, 12 receive the induced Brillouin scattering light caused in the transmission light as the local oscillation source, the station constitution is simplified. |
