Approximate analytical expressions for pulse modulation response of quantum cascade lasers

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.

Keywords:

• Fall time
• piece-wise analysis
• pulse response
• quantum cascade lasers
• rise time
• turn-on delay

Notes

No potential conflict of interest was reported by the authors.

Additional information

Funding

The funding for this project is made possible through the Postgraduate Scholarship obtained from Swinburne University of Technology and Post-Doctoral Research Scheme obtained from Universiti Malaysia Sarawak (UNIMAS).