Title :
Improvements in mode-locked semiconductor diode lasers using monolithically integrated passive waveguides made by quantum-well intermixing
Author :
Camacho, F. ; Avrutin, E.A. ; Cusumano, P. ; Saher Helmy, A. ; Bryce, A.C. ; Marsh, J.H.
Author_Institution :
Dept. of Electron. & Electr. Eng., Glasgow Univ., UK
Abstract :
By using the technique of quantum-well intermixing (QWI), monolithically integrated passive, and active waveguides can be fabricated. It is shown that mode-locked extended cavity semiconductor lasers with integrated low-loss passive waveguides display superior performance to devices in which the entire waveguide is active: the threshold current is a factor of 3-5 lower, the pulsewidth is reduced from 10.2 ps in the all active laser to 3.5 ps in the extended cavity device and there is a decrease in the free-running jitter level from 15 to 6 ps (10 kHz-10 MHz).
Keywords :
integrated optics; jitter; laser cavity resonators; laser mode locking; optical fabrication; optical saturable absorption; quantum well lasers; ridge waveguides; waveguide lasers; 10 kHz to 10 MHz; 10.2 to 3.5 ps; 15 to 6 ps; active waveguides; extended cavity semiconductor lasers; fabrication; free-running jitter level; integrated low-loss passive waveguides; mode-locked semiconductor diode lasers; monolithically integrated passive waveguides; pulsewidth; quantum-well intermixing; threshold current; Displays; Laser mode locking; Optical pulses; Quantum well lasers; Semiconductor diodes; Semiconductor lasers; Semiconductor waveguides; Space vector pulse width modulation; Threshold current; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
