Narrow-linewidth strained-layer 1.5 mu m multiquantum well distributed feedback lasers |
| |
Authors: | Wang S.J. Twu Y. Tanbunek T. Logan R.A. Dutta N.K. Piccirilli A.B. |
| |
Affiliation: | AT&T Bell Labs., Murray Hill, NJ, USA; |
| |
Abstract: | The performance characteristics of narrow-linewidth strained-layer 1.5 mu m multi-quantum-well distributed feedback (MQW-DFB) lasers are presented. Measured linewidth as low as 3.5 MHz has been observed for one of the 250 mu m long devices at 14.4 mW output. Under 1.7 Gbit/s 1.0, 1.0, . . . pattern signal modulation, the lasers have 20 dB down full width chirp in the range of 5-6 AA for the off state at 0.8 I/sub th/. The chirp widths are about half of those of bulk-active DFB lasers. A 1.7 Gbit/s amplitude-shift-keying transmission experiment using one of the low-chirp lasers has been demonstrated. The transmission over 60 km of standard fibre only result in a 0.8 dB dispersion power penalty and has a receiver sensitivity of -36.2 dBm at BER=10/sup -9/.<> |
| |
Keywords: | |
|
|