Title :
Tunable amplification properties of distributed feedback laser diodes
Author :
Kikushima, Koji ; Nawata, Kiyoshi ; Koga, Masafumi
Author_Institution :
Transmission Syst. Lab., NTT, Kanagawa-ken, Japan
fDate :
2/1/1989 12:00:00 AM
Abstract :
The tunable amplification properties of a distributed feedback laser diode (DFB-LD) are described. The performance of the laser diode as an optical filter, its tuning range, amplification gain, crosstalk due to submodes, and signal-to-noise ratio are determined. To achieve maximum amplification with the least noise, the DFB-LD injection current is held at or near the threshold value by feedback from an optical detector. The resonant wavelength is precisely controlled over a range of 2.0 nm (154 GHz) by varying the temperature of the DFB-LD, while at the same time the injection current is kept at the optimum value by the feedback system. By using the tunable amplification properties of a DFB-LD, an optical tunable filter was experimentally observed
Keywords :
crosstalk; distributed feedback lasers; feedback; laser tuning; optical filters; semiconductor junction lasers; 154 GHz; DFB-LD; amplification gain; crosstalk; distributed feedback laser diodes; feedback; laser tuning; optical detector; optical filter; signal-to-noise ratio; Crosstalk; Diode lasers; Distributed feedback devices; Laser feedback; Laser noise; Laser tuning; Optical feedback; Optical filters; Optical tuning; Tunable circuits and devices;
Journal_Title :
Quantum Electronics, IEEE Journal of
