Tunable Distributed Feedback Quantum Cascade Lasers by a Sampled Bragg Grating

Author

Ning Zhuo ; Jinchuan Zhang ; Fengqi Liu ; Lijun Wang ; Song Tan ; Fangliang Yan ; Junqi Liu ; Zhanguo Wang

Author_Institution

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

Volume

25

Issue

11

fYear

2013

fDate

1-Jun-13

Firstpage

1039

Lastpage

1042

Abstract

A novel complex-coupled distributed feedback quantum cascade laser emitting around λ ~ 4.7 μm is demonstrated by a sampled Bragg grating (SBG). The key superiorities are to utilize the +1st-order (positive first order) transmission of the SBG for laser single-mode operation, and use conventional holographic exposure combined with the optical photolithography technology to fabricate the sampled grating, which lead to improved flexibility, repeatability, and cost-effectiveness. Selective single-mode lasing with a mean side mode suppression ratio above 20 dB and wavelength coverage range of 87 nm is achieved by changing the sampling period.

Keywords

Bragg gratings; distributed feedback lasers; holographic gratings; laser modes; laser tuning; light transmission; photolithography; quantum cascade lasers; +1st-order transmission; SBG; complex-coupled distributed feedback quantum cascade laser; conventional holographic exposure; cost-effectiveness; flexibility; laser single-mode operation; mean side mode suppression ratio; optical photolithography; positive first order transmission; repeatability; sampled Bragg grating; sampling period; selective single-mode lasing; tunable distributed feedback quantum cascade lasers; Quantum cascade lasers; sampled Bragg grating; semiconductor lasers;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2013.2257716

Filename

6497504