Title :
Noncontact vibration sensors based on current modulated external cavity semiconductor lasers
Author :
Morgan, C. ; Bordovsky, M. ; White, I. ; Griffiths, R.
Author_Institution :
Centre for Commun. Res., Bristol Univ., UK
fDate :
12/1/2000 12:00:00 AM
Abstract :
An improvement in performance and design of noncontact vibration sensors based on external cavity semiconductor lasers is demonstrated. A technique for narrowing RF spectral peaks in external cavity lasers with moderate optical feedback by direct current modulation is explained. Current modulation frequencies suitable for use with developed position and vibration sensors are identified. Improvements in accuracy and resolution for the sensors are recorded and illustrated
Keywords :
electro-optical modulation; laser cavity resonators; laser feedback; measurement by laser beam; optical sensors; semiconductor lasers; vibration measurement; RF spectral peak narrowing; accuracy; current modulated external cavity semiconductor lasers; current modulation frequencies; direct current modulation; moderate optical feedback; noncontact vibration sensors; resolution;
Journal_Title :
Optoelectronics, IEE Proceedings -
DOI :
10.1049/ip-opt:20000868
