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Improved two level model of mid-infrared quantum cascade lasers for analysis of direct intensity modulation response

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2 Author(s)
Webb, J.F. ; School of Engineering, Science and Computing, Swinburne University of Technology, Sarawak Campus, Kuching 93350, Sarawak, Malaysia ; Haldar, M.K.

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The direct intensity modulation response of quantum cascade lasers can be accurately calculated from a three-level model. However, the calculations are algebraically complex. An alternative two-level model gives simpler expressions and more readily provides insight into the role of parameters influencing the modulation response. The object of this paper is to improve the two-level model and analyze the direct intensity modulation response. The modified model will simplify theoretical investigation of modulation related phenomena.

Published in:

Journal of Applied Physics  (Volume:111 ,  Issue: 4 )