公开(公告)号：JPH08163097A

公开(公告)日：1996-06-21

申请号：JP6813995

申请日：1995-03-27

Applicant: KOREA ELECTRONICS TELECOMM ,  KOREA TELECOMMUNICATION

Inventor： RIYU GABU YORU ,  BAKU CHIYAN SUYU

IPC: G02B6/26 ,  H01S5/0687 ,  H01S5/40 ,  H04B10/071 ,  H04J14/00 ,  H04J14/02

Abstract: PURPOSE: To maximize the number of multiplexing light sources by enhancing the extinction ratio of an error signal. CONSTITUTION: A center carrier frequency of each light source 13 is dithered by a low frequency signal from each low frequency oscillator 11. Optical signals from the light sources are coupled by a 2×2 photocoupler 15. One output from the photocoupler 15 is sent externally as a final multiplexed output and the other output is fed to an optical fiber filter 17 in a resonance means via a 2×1 photocoupler 16. The optical signal reflected in the filter 17 is converted into an electric signal by a photo detector 18 via the photocoupler 16 and the electric signal is fed to an optical frequency stabilizing controller 19. A PID circuit 20 in the controller 19 detects an error signal, it is converted into a corresponding current by a PSD circuit 21 and the current is applied as a bias to the light sources 13. Since center carrier frequencies f1-fn of the light sources 13 are aligned corresponding to resonance frequencies f1'-fn' of the resonator by repeating the process above, an output that is optical-frequency-multiplexed at an equal interval is obtained.