Title :
Direct intensity modulation in sampled-grating DBR lasers
Author :
Majewski, M.L. ; Barton, J. ; Coldren, L.A. ; Akulova, Y. ; Larson, M.C.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
fDate :
6/1/2002 12:00:00 AM
Abstract :
In this letter, we present new experimental results obtained for direct intensity modulation of widely tunable sampled-grating distributed Bragg-reflector (SGDBR) lasers. These results are of significance to SGDBR applications in wavelength-division-multiplexing systems. The devices described operate in the C-band (wavelength range 1525-1565 nm). A 6-GHz small-signal modulation bandwidth and >10-dB signal extinction ratio under large-signal operation were obtained. We have also recorded an undistorted eye pattern for a nonreturn-to-zero random signal 2/sup 31/-1 word length at 2.5-Gb/s bit rate during transmission over 75-km of standard single-mode fiber.
Keywords :
diffraction gratings; distributed Bragg reflector lasers; intensity modulation; optical modulation; optical transmitters; quantum well lasers; wavelength division multiplexing; 1525 to 1565 nm; 2.5 Gbit/s; 6 GHz; 75 km; C-band operation; MQW active region; direct intensity modulation; large-signal operation; nonreturn-to-zero random signal; sampled-grating DBR lasers; signal extinction ratio; small-signal modulation bandwidth; standard single-mode fiber; transmitter; undistorted eye pattern; wavelength-division-multiplexing systems; widely tunable sampled-grating distributed Bragg-reflector lasers; Bandwidth; Distributed Bragg reflectors; Intensity modulation; Laser tuning; Mirrors; Optical fiber communication; Optical fiber devices; Transmitters; Tunable circuits and devices; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2002.1003080
