Title :
Thermal dependence of the signal to noise ratio of self-mixing sensors based on multimode VCSELs
Author :
Matharu, Ranveer S. ; Perchoux, Julien ; Kliese, Russell ; Lim, Yah Leng ; Rakic, Aleksandar D.
Author_Institution :
Sch. of Inf. & Technol. & Electr. Eng., Univ. of Queensland, Brisbane, QLD, Australia
Abstract :
We investigate experimentally the signal-to-noise ratio (SNR) of the self-mixing signal from a Vertical-Cavity Surface-Emitting Laser (VCSEL) based sensor as a function of laser driving current and the ambient temperature. The maximum SNR in the current-temperature space can be well approximated by the model related to the temperature dependence of the threshold current for individual VCSEL transverse modes.
Keywords :
Doppler measurement; laser cavity resonators; laser modes; laser velocimeters; optical noise; optical sensors; remote sensing by laser beam; semiconductor lasers; surface emitting lasers; current-temperature space; laser Doppler velocimeter; laser driving current; multimode VCSEL; self-mixing sensors; signal-to-noise ratio; temperature dependent threshold current; vertical-cavity surface-emitting laser based sensor;
Conference_Titel :
Optoelectronic and Microelectronic Materials and Devices (COMMAD), 2010 Conference on
Conference_Location :
Canberra, ACT
Print_ISBN :
978-1-4244-7334-2
Electronic_ISBN :
1097-2137
DOI :
10.1109/COMMAD.2010.5699786
