Instantaneous power and threshold in continuous wave quantum cascade lasers

Using low-duty cycle pulses superimposed on a DC current, we determine the type of power roll-over and obtain the instantaneous threshold current, current efficiency and core temperature of a quantum-cascade laser in continuous wave operation.

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Bibliographic Details
Published in:	2009 Conference on Lasers and Electro-Optics and 2009 Conference on Quantum electronics and Laser Science Conference pp. 1 - 2
Main Authors:	Hoffman, A.J., Braun, P.X., Escarra, M.D., Howard, S.S., Franz, K.J., Xiaojun Wang, Jen-Yu Fan, Gmachl, C.
Format:	Conference Proceeding
Language:	English
Published:	IEEE 01-05-2009
Subjects:	(140.5965) Semiconductor lasers (140.6810) Thermal effects Current measurement Laser modes Optical pulses Power generation Power lasers Pulse measurements quantum cascade Quantum cascade lasers Semiconductor lasers Temperature Threshold current
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Description
Summary:	Using low-duty cycle pulses superimposed on a DC current, we determine the type of power roll-over and obtain the instantaneous threshold current, current efficiency and core temperature of a quantum-cascade laser in continuous wave operation.
ISSN:	2160-9004
DOI:	10.1364/CLEO.2009.CThC5