DocumentCode :
752121
Title :
Highly External Optical Feedback-Tolerant 1.49- 
m Single-Mode Lasers With Partially Corrugated Gratings
Author :
Gotoda, Mitsunobu ; Nishimura, Tetsuya ; Matsumoto, Keisuke ; Aoyagi, Toshitaka ; Yoshiara, Kiichi
Author_Institution :
Adv. Technol. R&D Center, Mitsubishi Electr. Corp., Amagasaki
Volume :
15
Issue :
3
fYear :
2009
Firstpage :
612
Lastpage :
617
Abstract :
An InGaAsP single-mode laser diode (LD) highly tolerant to optical feedback was realized utilizing a partially corrugated grating with a window-mirror structure. The length and the coupling coefficient of the grating were properly chosen to enable moderate output power, low feedback sensitivity, and a side mode suppression ratio of 40 dB simultaneously. Under -16 dB external optical feedback, the relative intensity noise (RIN) was improved by 10 dB compared with that of a conventional DFB LD. The RIN was maintained at less than -120 dB/Hz under strong external optical feedback as high as -10 dB. These results show that the fabricated lasers are potentially useful for isolator-free optical modules.
Keywords :
III-V semiconductors; diffraction gratings; gallium arsenide; indium compounds; laser feedback; laser mirrors; laser modes; laser noise; optical communication; optical isolators; optical windows; semiconductor lasers; InGaAsP; grating coupling coefficient; isolator-free optical module; laser fabrication; optical communication; optical feedback single-mode laser diode; partially corrugated grating; relative intensity noise; side mode suppression; wavelength 1.49 mum; window-mirror structure; DFB lasers; optical communication; optical feedback; semiconductor lasers;
fLanguage :
English
Journal_Title :
Selected Topics in Quantum Electronics, IEEE Journal of
Publisher :
ieee
ISSN :
1077-260X
Type :
jour
DOI :
10.1109/JSTQE.2009.2013358
Filename :
4840371
Link To Document :
