$\\lambda \\sim {3.35} \\mu$ m Distributed-Feedback Quantum-Cascade Lasers With High-Aspect-Ratio Lateral Grating

Author

Slight, Thomas J. ; Tandoi, Giuseppe ; Revin, Dmitry G. ; McKee, Andrew ; Zhang, Shiyong Y. ; Meredith, Wyn ; Cockburn, John W. ; Ironside, Charles N.

Author_Institution

Compound Semicond. Technol. Ltd., Glasgow, UK

Volume

23

Issue

7

fYear

2011

fDate

4/1/2011 12:00:00 AM

Firstpage

420

Lastpage

422

Abstract

We report the development of room-temperature distributed-feedback quantum-cascade lasers operating in a single mode in the 3.34 to 3.35 μm wavelength range. First-order lateral gratings with high aspect ratio (the ratio between the grating etch depth and its period) were formed using inductively coupled plasma etching. The as-cleaved lasers emit in pulsed regime with a sidemode suppression ratio of up to 24 dB and a peak single-mode output power of 130 mW from a single facet.

Keywords

diffraction gratings; distributed feedback lasers; laser modes; laser stability; optical pulse generation; quantum cascade lasers; sputter etching; distributed-feedback quantum-cascade lasers; grating etch depth; high-aspect-ratio lateral grating; inductively coupled plasma etching; power 130 mW; sidemode suppression ratio; single mode operation; temperature 293 K to 298 K; wavelength 3.34 mum to 3.35 mum; Distributed-feedback (DFB) devices; optical tuning; quantum-cascade lasers (QCLs);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2010.2103358

Filename

5678625