Absence of relaxation oscillation in quantum cascade lasers verified by high-frequency modulation

Rainer Martini; Roberto Paiella; Federico Capasso; Claire Gmachl; Harold Y. Hwang; Deborah L. Sivco; Alfred Y. Cho; E. A. Whittaker; H. C. Liu

Conference on Lasers and Electro-Optics
OSA Technical Digest (Optica Publishing Group, 2001),
paper CPD17

Absence of relaxation oscillation in quantum cascade lasers verified by high-frequency modulation

Rainer Martini, Roberto Paiella, Federico Capasso, Claire Gmachl, Harold Y. Hwang, Deborah L. Sivco, Alfred Y. Cho, E. A. Whittaker, and H. C. Liu

Conference on Lasers and Electro-Optics 2001

Baltimore, Maryland United States
6–10 May 2001
ISBN: 1-55752-662-1

From the session
CLEO Postdeadline: Telecomm, Semiconductor Lasers and Ultrafast (CPD)

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R. Martini, R. Paiella, F. Capasso, C. Gmachl, H. Y. Hwang, D. L. Sivco, A. Y. Cho, E. A. Whittaker, and H. C. Liu, "Absence of relaxation oscillation in quantum cascade lasers verified by high-frequency modulation," in Conference on Lasers and Electro-Optics, J. Kafka, K. Vahala, R. Williamson, and A. Willner, eds., OSA Technical Digest (Optica Publishing Group, 2001), paper CPD17.

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Abstract

Unipolar quantum cascade lasers (QCLs) feature unique high-frequency characteristics with promising application in telecommunication [1], Based on intersubband lasing transition, these devices are characterized by extremely short (picosecond) carrier relaxation lifetimes, dominated by ultrafast LO-phonon-assisted processes.

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