Title :
FM response of InGaAsP buried heterostructure distributed feedback lasers and their applications in incoherent FSK systems
Author :
Wang, S.-J. ; Wan, Y. Jessica ; Dutta, Niloy K. ; Twu, Yihjye
Author_Institution :
AT&T Bell Lab., Murray Hill, NJ, USA
fDate :
12/1/1990 12:00:00 AM
Abstract :
Measurements are reported of the frequency modulation (FM) response of InGaAsP buried heterostructure distributed feedback (DFB) lasers and the system performance of a 1.7-Gb/s and 622-Mb/s incoherent frequency-shift-keyingn (FSK) system using these lasers. The measured lasers include 1.55-μm conventional DFB lasers and quarter-wave shifted DFB lasers. The thermal dips in the FM response of quarter-wave shifted DFB lasers usually occur at the lower frequencies, compared with that of conventional (250-μm-long) DFB lasers. A receiver sensitivity of -32.5 dBm (-39.5 dBm) for a 1.7-GB/s (622-Mb/s) incoherent frequency-shift-keying (FSK) system was achieved using a quarter-wave shifted DFB laser
Keywords :
III-V semiconductors; distributed feedback lasers; frequency modulation; frequency shift keying; gallium arsenide; gallium compounds; indium compounds; optical communication equipment; optical modulation; semiconductor junction lasers; 1.55 micron; 1.7 Gbit/s; 622 Mbit/s; FM response; InGaAsP; InGaAsP buried heterostructure distributed feedback lasers; frequency modulation; frequency-shift-keying; incoherent FSK systems; incoherent frequency-shift-keying; quarter-wave shifted DFB lasers; receiver sensitivity; thermal dips; Chirp modulation; Distributed feedback devices; Fiber lasers; Frequency modulation; Frequency shift keying; Intensity modulation; Laser applications; Laser feedback; Optical receivers; Pulse modulation;
Journal_Title :
Lightwave Technology, Journal of
