Characterizing photonic crystal waveguides with an expanded k-space evanescent coupling technique.
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.
Lee
Michael W
MW
Centre for Ultrahigh-bandwidth Devices for Optical Systems, School of Physics, University of Sydney, Sydney, NSW 2006, Australia. mlee@physics.usyd.edu.au
Grillet
Christian
C
Poulton
Christopher G
CG
Monat
Christelle
C
Smith
Cameron L C
CL
Mägi
Eric
E
Freeman
Darren
D
Madden
Steve
S
Luther-Davies
Barry
B
Eggleton
Benjamin J
BJ
D000465:Algorithms; D004867:Equipment Design; D019544:Equipment Failure Analysis / Q000295:instrumentation* / Q000379:methods*; D005336:Fiber Optic Technology / Q000295:instrumentation*