Title :
Nonlinear circuit analysis of laser diodes under microwave direct modulation
Author :
Iezekiel, S. ; Snowden, C.M.
Author_Institution :
Dept. of Electron. & Electr. Eng., Leeds Univ., UK
Abstract :
A microwave nonlinear circuit analysis technique which can account for all known steady-state responses and has been developed and applied to the large-signal characterization of directly modulated laser diodes is presented. An equivalent circuit derived from the rate equations is used to model the laser diode. The technique is based on a harmonic balance algorithm which represents two-tone inputs by describing frequencies. Second harmonic and third-order intermodulation distortion results for a GaAlAs diode have been compared with corresponding measured data to validate the approach. Aperiodic responses are detected by means of bifurcation theory.<>
Keywords :
equivalent circuits; intermodulation; nonlinear network analysis; optical communication equipment; optical modulation; semiconductor device models; semiconductor junction lasers; GaAlAs diode; aperiodic responses; bifurcation theory; describing frequencies; directly modulated laser diodes; equivalent circuit; harmonic balance algorithm; large-signal characterization; microwave direct modulation; microwave nonlinear circuit analysis; model; optical fibre links; rate equations; second harmonic IMD; semiconductor lasers; steady-state responses; third-order intermodulation distortion; two-tone inputs; Circuit analysis; Diode lasers; Distortion measurement; Equivalent circuits; Frequency; Intermodulation distortion; Microwave theory and techniques; Nonlinear circuits; Nonlinear equations; Steady-state;
Conference_Titel :
Microwave Symposium Digest, 1990., IEEE MTT-S International
Conference_Location :
Dallas, TX
DOI :
10.1109/MWSYM.1990.99732
