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Proceedings Paper

Sub-threshold linewidth broadening factor of a 3.4μm interband cascade laser operated at room temperature
Author(s): Yu Deng; Cheng Wang
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Paper Abstract

Interband cascade laser (ICL) is a power-efficient mid-infrared semiconductor laser source. Linewidth broadening factor (LBF) is a crucial parameter of semiconductor lasers. This work investigates the sub-threshold LBF of a continuous wave ICL operated at room temperature, using the Hakki-Paoli method. The carrier-induced gain variation of the ICL is extracted from the amplified spontaneous emission spectrum. The refractive index variation is determined by the optical wavelength change, and the thermal effect is carefully removed. It shows that the LBF of the ICL around the gain peak ranges from 1.1 to 1.4, depending on the operation wavelength.

Paper Details

Date Published: 2 March 2020
PDF: 6 pages
Proc. SPIE 11274, Physics and Simulation of Optoelectronic Devices XXVIII, 1127422 (2 March 2020); doi: 10.1117/12.2544086
Show Author Affiliations
Yu Deng, ShanghaiTech Univ. (China)
Shanghai Institute of Microsystem and Information Technology (China)
Univ. of Chinese Academy of Sciences (China)
Cheng Wang, ShanghaiTech Univ. (China)

Published in SPIE Proceedings Vol. 11274:
Physics and Simulation of Optoelectronic Devices XXVIII
Bernd Witzigmann; Marek Osiński; Yasuhiko Arakawa, Editor(s)

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