High-Power Operation of Uncoated Strain-Compensated Quantum Cascade Lasers at 4.8μm

Chin. Phys. Lett.

2007, Vol. 24

Issue (12): 3428-3430 DOI:

Original Articles

High-Power Operation of Uncoated Strain-Compensated Quantum Cascade Lasers at 4.8μm

LI Lu;SHAO Ye;LIU Jun-Qi;LIU Feng-Qi;WANG Zhan-Guo

Key Laboratory of Semiconductor Materials Science, Institute of Semiconductors, Chinese Academy of Sciences, PO Box 912, Beijing 100083

Cite this article:

LI Lu, SHAO Ye, LIU Jun-Qi et al 2007 Chin. Phys. Lett. 24 3428-3430

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Abstract High-power operation of uncoated 22-μm-wide quantum cascade lasers (QCLs) emitting at λ≈4.8μm is reported. The emitting region of the QCL structure consists of a 30-period strain-compensated In_0.68Ga_0.32As/In_0.37Al_0.63As superlattice. For a 4-mm-long laser in pulsed mode, a peak output power is achieved in excess of 2240mW per facet at 81K with a threshold current density of 0.64kA/cm². The effects of varying the cavity lengths from 1 to 4mm on the performances of the QCLs are analysed
in detail and the low waveguide loss of only about 1.4cm^-1 is extracted.

Keywords: 42.55.Px 85.60.Bt

Received: 07 June 2007 Published: 03 December 2007

PACS:	42.55.Px	(Semiconductor lasers; laser diodes)
	85.60.Bt	(Optoelectronic device characterization, design, and modeling)

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https://cpl.iphy.ac.cn/ OR https://cpl.iphy.ac.cn/Y2007/V24/I12/03428

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	LI Lu
	SHAO Ye
	LIU Jun-Qi
	LIU Feng-Qi
	WANG Zhan-Guo

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