Title :
Self-mixing signals in terahertz lasers
Author :
Lim, Yah ; Bertling, K. ; Dean, P. ; Valavanis, A. ; Alhathlool, Raed ; Khanna, Suraj P. ; Indjin, Dragan ; Linfield, Edmund H. ; Davies, A. Giles ; Wilson, S.J. ; Rakic, A.D.
Author_Institution :
Sch. of Inf. Technol. & Electr. Eng., Univ. of Queensland, Brisbane, QLD, Australia
Abstract :
Recently demonstrated self-mixing effect in terahertz quantum cascade lasers (QCL) opens new possibilities for detectorless sensing in this range of electromagnetic spectrum. In this paper we compare self-mixing signals obtained from variations in QCL terminal voltage against the signals obtained from variations in QCL radiated power monitored using a bolometer. We show that these two signals are equivalent allowing for the disposal of a conventional bulky and slow thermal detector.
Keywords :
bolometers; quantum cascade lasers; QCL radiated power; QCL terminal voltage; bolometer; detectorless sensing; electromagnetic spectrum; self-mixing effect; self-mixing signals; slow thermal detector; terahertz quantum cascade lasers; Optical attenuators; Optical imaging; Optical mixing; Optical sensors; Optical surface waves; Quantum cascade lasers;
Conference_Titel :
Optoelectronic and Microelectronic Materials & Devices (COMMAD), 2012 Conference on
Conference_Location :
Melbourne, VIC
Print_ISBN :
978-1-4673-3047-3
DOI :
10.1109/COMMAD.2012.6472382
