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Proceedings Paper

Dual section quantum cascade lasers with wide electrical tuning
Author(s): S. Slivken; N. Bandyopadhyay; S. Tsao; S. Nida; Y. Bai; Q. Y. Lu; M. Razeghi
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Paper Abstract

This paper describes our development efforts at Northwestern University regarding dual-section sampled grating distributed feedback (SGDFB) QCLs. These devices are the same size, but have much wider electrical tuning, than a traditional DFB laser. In this paper, I will show how we have dramatically extended the monolithic tuning range of high power quantum cascade lasers with high side mode suppression. This includes individual laser element tuning of up to 50 cm-1 and 24 dB average side mode suppression. These lasers are capable of room temperature continuous operation with high power (<100 mW) output. Additionally, we have demonstrated a broad spectral coverage of over 350 cm-1 on a single chip, which is equivalent to 87.5% of the gain bandwidth. The eventual goal is to realize an extended array of such laser modules in order to continuously cover a similar or broader spectral range, similar to an external cavity device without any external components.

Paper Details

Date Published: 4 February 2013
PDF: 9 pages
Proc. SPIE 8631, Quantum Sensing and Nanophotonic Devices X, 86310P (4 February 2013); doi: 10.1117/12.2008506
Show Author Affiliations
S. Slivken, Northwestern Univ. (United States)
N. Bandyopadhyay, Northwestern Univ. (United States)
S. Tsao, Northwestern Univ. (United States)
S. Nida, Northwestern Univ. (United States)
Y. Bai, Northwestern Univ. (United States)
Q. Y. Lu, Northwestern Univ. (United States)
M. Razeghi, Northwestern Univ. (United States)


Published in SPIE Proceedings Vol. 8631:
Quantum Sensing and Nanophotonic Devices X
Manijeh Razeghi, Editor(s)

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