title: Optical fiber-fault surveillance for passive optical networks in S-band operation window.
abstract: An S-band (1470 to 1520 nm) fiber laser scheme, which uses multiple fiber Bragg grating (FBG) elements as feedback elements on each passive branch, is proposed and described for in-service fault identification in passive optical networks (PONs). By tuning a wavelength selective filter located within the laser cavity over a gain bandwidth, the fiber-fault of each branch can be monitored without affecting the in-service channels. In our experiment, an S-band four-branch monitoring tree-structured PON system is demonstrated and investigated experimentally.
authors.forename: Chien-Hung
authors.initials: CH
authors.lastname: Yeh
authors.forename: Sien
authors.initials: S
authors.lastname: Chi