title: Bandwidth-division in digitally enhanced optical frequency domain reflectometry.
abstract: We demonstrate for the first time the use of digital range-gating in OFDR to allow for orders of magnitude reduction in the required sampling rates. This allows for sensing over long lengths of fiber with fast sweeps of the optical source frequency, without requiring impractical sampling rates. The range-gating is achieved using digitally enhanced interferometry (DI), which isolates individual sections of OFDR signal bandwidth. The reductions in sampling rates permitted by the bandwidth-division are demonstrated both numerically and experimentally.
authors.affiliation: Department of Quantum Science, Research School of Physics and Engineering, The Australian National University, Canberra, ACT 0200, Australia. nicolas.riesen@anu.edu.au
authors.forename: Nicolas
authors.initials: N
authors.lastname: Riesen
authors.forename: Timothy T-Y
authors.initials: TT
authors.lastname: Lam
authors.forename: Jong H
authors.initials: JH
authors.lastname: Chow
mesh_terms: D010783:Photometry / Q000379:methods*; D012815:Signal Processing, Computer-Assisted; D013685:Telecommunications