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Gain switching characteristics of quantum well laser by using SPICE simulator

S. OZYAZICI1,* , N. DOĞRU1

Affiliation

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

Abstract

Gain switching phenomena of quantum well (QW) lasers diode is described by using a SPICE equivalent circuit model, which is based on the three-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 increases as the dc bias is increased. FWHM decreases also for small value of gain compression parameter 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..

Keywords

Quantum well (QW) laser, SPICE simulator, Gain switching.

Submitted at: Aug. 9, 2007
Accepted at: Sept. 18, 2007

Citation

S. OZYAZICI, N. DOĞRU, Gain switching characteristics of quantum well laser by using SPICE simulator, Journal of Optoelectronics and Advanced Materials Vol. 9, Iss. 9, pp. 2820-2825 (2007)