In-service fault locating and supervisory CATV optical distribution network using WDM-based OTDR and optical switches

Ching Sheu Wang; Frank Tsai; Y. K. Tu; Chien-Chung Lee; Chi-Hsiung Chang; Yung Kung Chen

doi:10.1117/12.312848

19 June 1998 In-service fault locating and supervisory CATV optical distribution network using WDM-based OTDR and optical switches

Ching Sheu Wang, Frank Tsai, Y. K. Tu, Chien-Chung Lee, Chi-Hsiung Chang, Yung Kung Chen

Author Affiliations +

Proceedings Volume 3420, Optical Fiber Communication; (1998) https://doi.org/10.1117/12.312848
Event: Asia Pacific Symposium on Optoelectronics '98, 1998, Taipei, Taiwan

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.

Citation Download Citation

Ching Sheu Wang, Frank Tsai, Y. K. Tu, Chien-Chung Lee, Chi-Hsiung Chang, and Yung Kung Chen "In-service fault locating and supervisory CATV optical distribution network using WDM-based OTDR and optical switches", Proc. SPIE 3420, Optical Fiber Communication, (19 June 1998); https://doi.org/10.1117/12.312848

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