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

Volume

32

Issue

20

fYear

2014

fDate

Oct.15, 15 2014

Firstpage

3735

Lastpage

3741

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;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2014.2312725

Filename

6776451