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Proceedings Paper

In-service fault locating and supervisory CATV optical distribution network using WDM-based OTDR and optical switches
Author(s): Ching Sheu Wang; Frank Tsai; Y. K. Tu; Chien-Chung Lee; Chi-Hsiung Chang; Yung Kung Chen
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Paper Abstract

We demonstrate an in-service fault-locating and supervisory technique for multi-staged CATV optical distribution networks. The requirements of ultra-high dynamic range of an optical time domain reflectometer (OTDR) to diagnose the network can be tremendously relaxed by the introduction of optical switch and wavelength-division-multiplexing (WDM) technique. Any faults of the fiber links whether before, after, or between optical splitters can be located. The system operation is experimentally demonstrated in a two- staged eight-optical-node CATV distribution network. The degradation of system performance of carrier-to-noise ratio, composite second order, and composite triple beat due to in- service OTDR operation can be neglected. This surveillance system can provide real-time testing, saving the cost of dispatching a technician to perform routine testing and reducing the time taken to identify faults after an outrage occurs.

Paper Details

Date Published: 19 June 1998
PDF: 5 pages
Proc. SPIE 3420, Optical Fiber Communication, (19 June 1998); doi: 10.1117/12.312848
Show Author Affiliations
Ching Sheu Wang, Chunghwa Telecom Labs. (Taiwan)
Frank Tsai, Chunghwa Telecom Labs. (United States)
Y. K. Tu, Chunghwa Telecom Labs. (Taiwan)
Chien-Chung Lee, Chunghwa Telecom Labs. (Taiwan)
Chi-Hsiung Chang, National Sun Yat-Sen Univ. (Taiwan)
Yung Kung Chen, National Sun Yat-Sen Univ. (Taiwan)

Published in SPIE Proceedings Vol. 3420:
Optical Fiber Communication
Winston I. Way; Franklin F. Tong; Alan Eli Willner, Editor(s)

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