Title :
Bandwidth enhancement of injection-locked 1.3 μm quantum-dot DFB laser
Author :
Terry, N.B. ; Naderi, N.A. ; Pochet, M. ; Moscho, A.J. ; Lester, L.F. ; Kovanis, V.
Author_Institution :
Air Force Res. Lab., Wright-Patterson AFB, OH
Abstract :
Optical injection locking of a quantum-dot distributed-feedback laser at 1.3 mum is reported. Using an injection ratio of 5.3 dB, an optical detuning of -40 pm, and a slave laser biased at 20 mA, the modulation bandwidth of the injection-locked laser was 16.3 GHz. This is over four times higher than the modulation bandwidth of the free-running quantum-dot laser. At a slave laser bias of 5.0 mA, injection locking resulted in a resonance frequency of 21.9 GHz, over eleven times higher than the relaxation frequency of the free-running slave laser.
Keywords :
distributed feedback lasers; laser beams; laser mode locking; laser tuning; optical modulation; quantum dot lasers; bandwidth 16.3 GHz; bandwidth enhancement; current 20 mA; free-running slave laser; injection ratio; injection-locked quantum-dot DFB laser; modulation bandwidth; optical detuning; optical injection locking mechanism; quantum-dot distributed-feedback laser; resonance frequency; slave laser bias; wavelength 1.3 mum;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:20080732
