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Improvements in mode-locked semiconductor diode lasers using monolithically integrated passive waveguides made by quantum-well intermixing

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6 Author(s)
Camacho, F. ; Dept. of Electron. & Electr. Eng., Glasgow Univ., UK ; Avrutin, E.A. ; Cusumano, P. ; Saher Helmy, A.
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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).

Published in:

Photonics Technology Letters, IEEE  (Volume:9 ,  Issue: 9 )