Room Temperature Continuous-Wave Operation of Top Metal Grating Distributed Feedback Quantum Cascade Laser at $\\lambda \\sim 7.6~\\mu{\\rm m}$

Author

Zhang, Jinchuan ; Wang, Lijun ; Tan, Song ; Chen, Jianyan ; Zhai, Shenqiang ; Liu, Junqi ; Liu, Fengqi ; Wang, Zhanguo

Author_Institution

Key Lab. of Semicond. Mater. Sci., Inst. of Semicond., Beijing, China

Volume

24

Issue

13

fYear

2012

fDate

7/1/2012 12:00:00 AM

Firstpage

1100

Lastpage

1102

Abstract

We demonstrate a carefully designed top metal grating distributed feedback quantum cascade laser emitting at λ ~ 7.6 μm. Room temperature continuous-wave singlemode operation with 30-dB sidemode suppression ratio and 40-mW output power is achieved. Such a simple and high-efficiency approach is presented as an alternative to the currently complicated buried grating technology in the long-wave infrared range.

Keywords

diffraction gratings; distributed feedback lasers; infrared spectra; quantum cascade lasers; continuous wave operation; grating technology; long wave infrared range; power 40 mW; sidemode suppression ratio; temperature 293 K to 298 K; top metal grating distributed feedback quantum cascade laser; wavelength 7.6 mum; Couplings; Distributed feedback devices; Gratings; Metals; Quantum cascade lasers; Silicon; Temperature measurement; Distributed feedback devices; quantum cascade lasers; semiconductor lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2012.2195652

Filename

6203641