학술논문
Approximate analytical expressions for pulse modulation response of quantum cascade lasers.
Document Type
Article
Author
Source
Subject
*PULSE modulation
*QUANTUM cascade lasers
*NEAR infrared radiation
*APPROXIMATION theory
*NUMERICAL analysis
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Language
ISSN
0950-0340
Abstract
Approximate analytical expressions for turn-on delay, rise time and fall time for pulse modulation of the drive current of quantum cascade lasers are presented. These time expressions are obtained using piece-wise analysis of rate equations. From the analytical expressions, the effects of laser parameters and off and on currents are discussed. A numerical analysis shows reasonable agreement with analytical results. It also confirms the predictions from analytical results. The pulse response is compared with that of near-infrared interband lasers. [ABSTRACT FROM PUBLISHER]