Integrating communication with sensing micro-bending of multi-mode optical fibre

Sardana, H.K. and Julka, G. and Chhabra, J.K. (2002) Integrating communication with sensing micro-bending of multi-mode optical fibre. Indian journal of pure & applied physics , 40 (10). pp. 720-725. ISSN 0019-5596

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Environment perturbations on a multi-mode fibre lead to changes in intensity at the output due to bending induced losses. A carrier signal has been modulated in a form such that, the amplitude of the light signal is not affected, which is left for sensing light intensity variations due to micro-bending. Pulse frequency modulation has been suggested for this purpose using a voltage-to-frequency converter. This information is again decoded at the receiver end using frequency-to-voltage conversion. In this manner, a fibre link, which is acting as a perturbation sensor, also acts as a communication link without affecting the sensing capability as long as the link is not damaged due to perturbation. It is known that, the multi-mode fibre can be used to sense any form of environment perturbation, such as strain, pressure, force, position, acceleration, temperature etc1-3. The proposed approach is applicable in all these situations with integrated communication capability.

Item Type: Article
Subjects: CSIO > Photonics Instrumentation
Depositing User: Ms. J Shrivastav
Date Deposited: 09 Mar 2012 16:51
Last Modified: 09 Mar 2012 16:51

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