Quantum Cascade Laser With Unilateral Grating

Author

Vaitiekus, Deivis ; Revin, Dmitry G. ; Kennedy, Kenneth L. ; Zhang, Shiyong Y. ; Cockburn, John W.

Author_Institution

Phys. & Astron. Dept., Univ. of Sheffield, Sheffield, UK

Volume

24

Issue

23

fYear

2012

Firstpage

2112

Lastpage

2114

Abstract

We report on distributed feedback quantum cascade lasers at a wavelength of 3.58 μm operating at room temperature. Single-mode emission with a side-mode suppression ratio of 30 dB is achieved by manufacturing single-sided third-order lateral gratings. The devices exhibit watt level peak powers with a threshold current density of ~ 4.3 kA/cm² at room temperature and remain in single-mode operation over the temperature range of 280-420 K.

Keywords

current density; diffraction gratings; distributed feedback lasers; laser modes; quantum cascade lasers; distributed feedback quantum cascade lasers; side-mode suppression ratio; single-mode emission; single-mode operation; single-sided third-order lateral gratings; temperature 280 K to 420 K; threshold current density; unilateral grating; watt level peak powers; wavelength 3.58 mum; Distributed feedback devices; Gratings; Laser modes; Quantum cascade lasers; Surface emitting lasers; Temperature distribution; Distributed feedback; lateral grating; quantum cascade laser; single mode; unilateral;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2221274

Filename

6316076