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A Fabry–Pérot electro-optic sensing system using a drive-current-tuned wavelength laser diode

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3 Author(s)
Wen-Kai Kuo ; Department of Electro-Optics Engineering, National Formosa University, 64 Wenhua Rd., Huwei, Yunlin 63208, Taiwan, Republic of China ; Wu, Pei-Yu ; Lee, Chang-Ching

Your organization might have access to this article on the publisher's site. To check, click on this link:http://dx.doi.org/+10.1063/1.3429950 

A Fabry–Pérot enhanced electro-optic sensing system that utilizes a drive-current-tuned wavelength laser diode is presented. An electro-optic prober made of LiNbO3 crystal with an asymmetric Fabry–Pérot cavity is used in this system. To lock the wavelength of the laser diode at resonant condition, a closed-loop power control scheme is proposed. Experiment results show that the system can keep the electro-optic prober at high sensitivity for a long working time when the closed-loop control function is on. If this function is off, the sensitivity may be fluctuated and only one-third of the best level in the worst case.

Published in:
Review of Scientific Instruments  (Volume:81 ,  Issue: 5 )

Date of Publication: May 2010

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