Approximate analytical expressions for pulse modulation response of quantum cascade lasers |
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| Authors: | K. S. C. Yong M. K. Haldar J. F. Webb |
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| Affiliation: | 1. Faculty of Computer Science and Information Technology, Universiti Malaysia Sarawak, Kota Samarahan, Malaysia.;2. Faculty of Engineering, Universiti Malaysia Sabah, Kota Kinabalu, Malaysia.;3. Intellectual Property Office, Newport, Wales. |
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| 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. |
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| Keywords: | Fall time piece-wise analysis pulse response quantum cascade lasers rise time turn-on delay |
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