Title :
Extremely low noise characteristics of DFB laser module with doubled optical isolator scheme
Author :
Uno, T. ; Fujito, K. ; Ishizuka, S. ; Ichida, T. ; Serizawa, H.
Author_Institution :
Matsushita Electr. Ind. Co. Ltd., Osaka, Japan
Abstract :
The authors have theoretically clarified that the optical feedback ratio should be suppressed to less than -70dB, then they have developed a DFB laser module with `doubled´ optical isolator scheme for the first time. An extremely low RIN value below -150dB/Hz has been achieved for the case with fiber far-end reflection. Temperature independent RIN characteristics have been also demonstrated
Keywords :
distributed feedback lasers; electron device noise; optical isolators; semiconductor junction lasers; DFB laser module; RIN value; buried double channel laser; doubled optical isolator scheme; fiber far-end reflection; optical feedback ratio; semiconductor laser;
Conference_Titel :
Optical Communication, 1988. (ECOC 88). Fourteenth European Conference on (Conf. Publ. No.292)
Conference_Location :
Brighton
