Self-mixing effect in THz quantum cascade lasers: Applications in sensing and imaging

Author

Raki, Aleksandar D. ; Taimre, T. ; Bertling, K. ; Yah Leng Lim ; Dean, P. ; Keeley, James ; Valavanis, A. ; Alhathlool, Raed ; Khanna, Suraj P. ; Lachab, Mohammad ; Indjin, Dragan ; Ikonic, Zoran ; Harrison, Peter ; Linfield, Edmund H. ; Davies, A. Giles

Author_Institution

Sch. of Inf. Technol. & Electr. Eng., Univ. of Queensland, Brisbane, QLD, Australia

fYear

2013

fDate

28-30 Oct. 2013

Firstpage

18

Lastpage

20

Abstract

The paper introduces self-mixing interferometry in semiconductor lasers in general, and then discusses recent advancements in the coherent THz imaging and sensing systems based on the self-mixing effect in terahertz quantum cascade lasers. Two different imaging modalities are used to illustrate the coherent nature of this sensing technique and its applications to three-dimensional surface profiling and material identification.

Keywords

light interferometry; quantum cascade lasers; terahertz wave detectors; terahertz wave imaging; THz quantum cascade lasers; coherent THz imaging system; coherent THz sensing system; imaging modality; material identification; self-mixing effect; self-mixing interferometry; semiconductor lasers; three-dimensional surface profiling; Choppers (circuits); Educational institutions; Materials; Mixers; Optical imaging; Optical sensors; Quantum cascade lasers; Optical feedback; QCL; Self-mixing; THz Sensing; THz imaging;

fLanguage

English

Publisher

ieee

Conference_Titel

Photonics (ICP), 2013 IEEE 4th International Conference on

Conference_Location

Melaka

Print_ISBN

978-1-4673-6073-9

Type

conf

DOI

10.1109/ICP.2013.6687056

Filename

6687056