Reduction of excess intensity noise induced by external reflection in a gain-coupled distributed feedback semiconductor laser

Author

Nakano, Yoshiaki ; Deguchi, Yoshitaka ; Ikeda, Kei ; Luo, Yi ; Tada, Kunio

Author_Institution

Dept. of Electron. Eng., Tokyo Univ., Japan

Volume

27

Issue

6

fYear

1991

fDate

6/1/1991 12:00:00 AM

Firstpage

1732

Lastpage

1735

Abstract

The intensity noise of a gain coupling (GC) distributed feedback (DFB) laser under the influence of external optical feedback was measured. As a whole, the GC DFB laser was found less sensitive to reflection in terms of relative intensity noise (RIN). Principal results obtained from experiments are described. Intensity noise characteristics of the isolated GC DFB laser (in the absence of external reflection) are the same as those of the conventional IC DFB laser. RIN lower than 10 ^-14 Hz^-1 is attainable at an output power above 3 mW. Intensity noise induced by optical feedback from a remote object (600 mm) is 10-20 dB less in the GC DFB laser when the amount of the feedback is between 0.1 and 1%. Adjacent reflection (90 mm) causes virtually no increase in intensity noise of the GC DFB laser if the feedback is not large

Keywords

distributed feedback lasers; electron device noise; semiconductor junction lasers; excess intensity noise; external optical feedback; external reflection; gain-coupled distributed feedback semiconductor laser; remote object; Acoustic reflection; Distributed feedback devices; Integrated circuit noise; Laser feedback; Laser noise; Noise reduction; Optical coupling; Optical feedback; Optical noise; Optical reflection;

fLanguage

English

Journal_Title

Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

0018-9197

Type

jour

DOI

10.1109/3.89998

Filename

89998