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Proceedings Paper

Integrated tunable DBR quantum cascade lasers with 30 cm-1 tuning range at 4.7 μm
Author(s): Liwei Cheng; Xing Chen; Fow-Sen Choa; Terrance Worchesky
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Paper Abstract

We report the fabrication and measurement results of an integrated distributed Bragg reflector (DBR) tunable buriedheterstructure (BH) quantum-cascade-laser (QCL) emitting around λ ~ 4.7 μm. We also demonstrated a special laser device bonding technique by utilizing two submounts for the gain and DBR grating sections of the laser. As a result, separated temperature controls of the two sections were successfully accomplished. At 293K, a wavelength tuning from 4.605 μm to 4.670 μm was obtained when the grating section temperature was changed by a miniature thermoelectric (TE) cooler. This is corresponding to a tuning range of 65 nm or equivalently 29.831 cm-1. The tuning efficiency is 0.0325 nm/mA. This technology is particularly desirable for chemical sensing, spectroscopic measurements and medical applications.

Paper Details

Date Published: 12 February 2010
PDF: 8 pages
Proc. SPIE 7616, Novel In-Plane Semiconductor Lasers IX, 761618 (12 February 2010); doi: 10.1117/12.842397
Show Author Affiliations
Liwei Cheng, Univ. of Maryland, Baltimore County (United States)
Xing Chen, Univ. of Maryland, Baltimore County (United States)
Fow-Sen Choa, Univ. of Maryland, Baltimore County (United States)
Terrance Worchesky, Univ. of Maryland, Baltimore County (United States)


Published in SPIE Proceedings Vol. 7616:
Novel In-Plane Semiconductor Lasers IX
Alexey A. Belyanin; Peter M. Smowton, Editor(s)

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