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Gain switching characteristics of quantum well laser in two level rate equations

NURAN DOGRU1,*

Affiliation

  1. Department of Electrical and Electronics, University of Gaziantep, 27310 Gaziantep, Turkey

Abstract

Gain switching characteristics of quantum well (QW) lasers diode is described for the first time by using two-level rate equations. Effects of gain switching frequency, some laser diode parameters and dc and rf drive conditions on the full-width half maximum (FWHM) of gain switched pulses are investigated. It is shown that FWHM of pulses decrease as the rf current increased, at a constant frequency. However, the FWHM of pulses increase as the dc bias is increased. FWHM decreases also for small value of gain compression parameter and spontaneous coupling factor whereas the variation in carrier lifetime in the well does not significantly affect the FWHM of generated pulses. It is also shown that as the frequency is increased, FWHM start to increase or decrease depending on the gain compression..

Keywords

Quantum well (QW) laser, Gain switching.

Submitted at: May 29, 2007
Accepted at: Aug. 18, 2007

Citation

NURAN DOGRU, Gain switching characteristics of quantum well laser in two level rate equations, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 8, pp. 2400-2403 (2007)