Title :
Harmonic and Intermodulation Distortion in Direct Intensity Modulated Quantum Cascade Lasers
Author :
Yong, Kelvin S. C. ; Haldar, Manas K. ; Webb, Jeffrey F.
Author_Institution :
Fac. of Eng., Comput. & Sci., Swinburne Univ. of Technol. Sarawak (Malaysia) Campus, Kuching, Malaysia
Abstract :
In this paper, nonlinear distortion in a quantum cascade laser arising from direct intensity modulation is studied. Harmonic and intermodulation distortion expressions for small sinusoidal modulation signals are derived using a perturbation method. The expressions are validated by making a comparison with a large signal simulation of a quantum cascade laser equivalent circuit. The effects of bias current, optical modulation depth, and modulation frequency on harmonic and intermodulation distortion are examined.
Keywords :
equivalent circuits; harmonic distortion; intensity modulation; intermodulation distortion; optical modulation; quantum cascade lasers; bias current; direct intensity modulation; equivalent circuit; harmonic distortion; intermodulation distortion; modulation frequency; optical modulation depth; perturbation method; quantum cascade lasers; small sinusoidal modulation signals; Equations; Frequency modulation; Harmonic analysis; Intermodulation distortion; Mathematical model; Quantum cascade lasers; Circuit simulation; harmonic distortion; intensity modulation; intermodulation distortion; numerical analysis; perturbation method; quantum cascade lasers;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2312725
