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In this paper, we will briefly outline our contributions for the physical realization of coded OTDR, along with its principles and also highlight recent key results related with its applications. For the communication network application, we report a multi-port / multi-wavelength, high-speed supervisory system for the in-service monitoring of a bidirectional WDM-PON system transmission line up to 16 ports x 32 nodes (512 users) capacity. Monitoring of individual branch traces up to 60 km was achieved with the application of a 127-bit simplex code, corresponding to a 7.5dB SNR coding gain effectively reducing the measurement time about 30 times when compared to conventional average mode OTDR. Transmission experiments showed negligible penalty from the monitoring system to the transmission signal quality, at a 2.5Gbps / 125Mbps (down / up stream) data rate. As an application to sensor network, a Raman …
International Society for Optics and Photonics
Publication date: 
21 Nov 2007

Namkyoo Park, Jeonghwan Lee, Jonghan Park, Jae Gwang Shim, Hosung Yoon, Jin Hee Kim, Kyoungmin Kim, Jae-Oh Byun, Gabriele Bolognini, Duckey Lee, Fabrizio Di Pasquale

Biblio References: 
Volume: 6781 Pages: 678129
Passive Components and Fiber-based Devices IV