title: Characterizing photonic crystal waveguides with an expanded k-space evanescent coupling technique.
abstract: We demonstrate a direct, single measurement technique for characterizing the dispersion of a photonic crystal waveguide (PCWG) using a tapered fiber evanescent coupling method. A highly curved fiber taper is used to probe the Fabry-Pérot spectrum of a closed PCWG over a broad k-space range, and from this measurement the dispersive properties of the waveguide can be found. Waveguide propagation losses can also be estimated from measurements of closed waveguides with different lengths. The validity of this method is demonstrated by comparing the results obtained on a 'W1' PCWG in chalcogenide glass with numerical simulation.
authors.affiliation: Centre for Ultrahigh-bandwidth Devices for Optical Systems, School of Physics, University of Sydney, Sydney, NSW 2006, Australia. mlee@physics.usyd.edu.au
authors.forename: Michael W
authors.initials: MW
authors.lastname: Lee
authors.forename: Christian
authors.initials: C
authors.lastname: Grillet
authors.forename: Christopher G
authors.initials: CG
authors.lastname: Poulton
authors.forename: Christelle
authors.initials: C
authors.lastname: Monat
authors.forename: Cameron L C
authors.initials: CL
authors.lastname: Smith
authors.forename: Eric
authors.initials: E
authors.lastname: Mägi
authors.forename: Darren
authors.initials: D
authors.lastname: Freeman
authors.forename: Steve
authors.initials: S
authors.lastname: Madden
authors.forename: Barry
authors.initials: B
authors.lastname: Luther-Davies
authors.forename: Benjamin J
authors.initials: BJ
authors.lastname: Eggleton
mesh_terms: D000465:Algorithms; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000295:instrumentation* / Q000379:methods*; D005336:Fiber Optic Technology / Q000295:instrumentation*