Title :
Drive current noise induced linewidth in tunable multielectrode lasers
Author :
Duan, G.H. ; Gallion, P.
Author_Institution :
Commun. Dept., Ecole Nat. Superieure des Telecommun., Paris, France
fDate :
4/1/1991 12:00:00 AM
Abstract :
It is shown that drive current noise could lead to an important increase of linewidth and a Gaussian line shape of tunable multielectrode distributed Bragg reflector (DBR) lasers. As an example, the drive current noise induced linewidth (DCNIL) has been measured to be about 120 MHz using a standard DC source through at 50 Omega resistor to drive the Bragg section of a tested DBR laser. For tunable lasers with an electronic tuning efficiency of more than 1 GHz/mA ultralow noise current sources should be used to ensure a negligible DCNIL.<>
Keywords :
distributed Bragg reflector lasers; electron device noise; laser tuning; semiconductor junction lasers; spectral line breadth; 50 ohm; DBR lasers; Gaussian line shape; drive current noise; electronic tuning efficiency; linewidth increase; semiconductor laser; standard DC source; tunable multielectrode lasers; Current measurement; Distributed Bragg reflectors; Drives; Gaussian noise; Laser noise; Laser tuning; Multi-stage noise shaping; Noise measurement; Shape; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
