Title :
High-speed 1.5-μm compressively strained multi-quantum well self-aligned constricted mesa DFB lasers
Author :
Hirayama, Yuzo ; Morinaga, Motoyasu ; Onomura, Masaaki ; Tanimura, Michio ; Tohyama, Masaki ; Funemizu, Masahisa ; Kushibe, Mitsuhiro ; Suzuki, Nobuo ; Nakamura, Masaru
Author_Institution :
Toshiba Corp., Kawasaki, Japan
fDate :
9/1/1992 12:00:00 AM
Abstract :
A great improvement in the high-speed characteristics for compressively strained multi-quantum-well (MQW) distributed-feedback (DFB) lasers with self-aligned constricted mesa structures is described. Negative wavelength detuning is an important factor in making possible the extraction of potential advantages for the compressively strained MQW DFB lasers. A 17-GHz bandwidth, which is the highest among the 1.5-μm MQW DFB lasers, is demonstrated. A wavelength chirp width of 0.42 nm at 10 Gb/s is obtained due to a reduced linewidth enhancement factor that has a magnitude of less than 2. Nonlinear damping K factor in a DFB laser with 45-nm negative detuning has drastically decreased to 0.13 ns, about half of that for unstrained MQW lasers. This is mainly due to an enhanced differential gain as large as 6.9×10 -12 m3/s. The estimated intrinsic maximum bandwidth is 68 GHz
Keywords :
damping; distributed feedback lasers; high-speed optical techniques; laser transitions; semiconductor lasers; spectral line breadth; 1.5 micron; 10 Gbit/s; 17 GHz; 68 GHz; InGaAsP-InP; compressively strained multi-quantum well self-aligned constricted mesa DFB lasers; enhanced differential gain; high-speed characteristics; intrinsic maximum bandwidth; linewidth enhancement factor; negative wavelength detuning; nonlinear damping K factor; wavelength chirp width; Bandwidth; Chirp; Damping; Distributed feedback devices; Fiber lasers; Laser feedback; Optical fiber communication; Quantum well devices; Quantum well lasers; Research and development;
Journal_Title :
Lightwave Technology, Journal of
