OTDR in Optical Amplifier Transmission Systems Using EDFAs Containing Optical Circulators,
Abstract
Optical time domain reflectometry (OTDR) is an effective technique for locating breaks and for determining the loss distribution along a fiber 12. However, OTDR can not be used with optical transmission lines containing traditional Er-doped fiber amplifiers (EDFAs) because EDFAs require optical isolators to eliminate signal reflection (3)-(5). The returning backscattered light generated by the forward traveling probe pulse is blocked by optical isolators in each EDFA. In this paper, we proposed a new EDFA containing optical circulators, which support both OTDR and digital signal transmission. Experimental results demonstrate that OTDR fault location and and 1.8Gb/s digital signal transmission can be carried out in the same optical transmission line containing three EDFAS.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 22, 1992
- Accession Number
- ADP007033
Entities
People
- Koh-ichi Aoyama
- Shigendo Nishi
- Yoshiaki Sato
Organizations
- NTT, Inc.