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Harmonic content and relaxation resonant frequency of a modulated laser diode
, Article Scientia Iranica ; Volume 16, Issue 2 D , 2009 , Pages 145-156 ; 10263098 (ISSN) ; Bavafa, M ; Chamanzar, M. R ; Khorasani, S ; Sharif University of Technology
2009
Abstract
In this paper, an analysis of the harmonic contents of the optical output power for an in-plane single mode laser diode is performed, and the results are described in detail. In the first step, the absolute value of power for each harmonic is obtained in terms of various laser diode parameters, and the variations of external parameters, such as modulation current, bias current and frequency, are discussed. The analysis is done by direct solution of the rate equations of an arbitrary laser diode for carrier and photon densities. It is known that the optical power has a nonlinear dependence on frequency, and the maximum optical power of each harmonic is attained in its resonance frequency. The...
All-optical set-reset flip-flop based on frequency bistability in semiconductor microring lasers
, Article Optics Communications ; Volume 282, Issue 12 , 2009 , Pages 2451-2456 ; 00304018 (ISSN) ; Zakeri, S ; Mirzaee, M. A ; Ghaderi, Z ; Farman, F ; Sharif University of Technology
2009
Abstract
The electric field of the modes of semiconductor microring lasers (SMRLs) in the presence of bus waveguide reflections are linear combinations of the clock wise (CW) and the counter clock wise (CCW) electric fields. The mode structures can be controlled by the waveguide reflection coefficients. The power ratio and phase difference of the CW and CCW fields of one mode is proportional to the ratio of the reflection coefficients of the left and right waveguides. It is shown that the degenerate CW and CCW modes in the presence of bus waveguide reflections are split into two modes with different frequencies. Employing these new modes, SMRL can be used as an element to design flip-flops used in...