Double waveguide couplers produced by simultaneous femtosecond writing.
We report on a novel method to create waveguide coupler devices in fused silica by combining the technique of beam shaping with femtosecond laser writing. The method is based on a programmable phase modulator and a dynamic variation of the phase-pattern during the writing process. The major advantage is the possibility to create complex devices in a single sweep by simultaneously writing two or more waveguides with changing separation. The guiding properties and the coupling behavior between the waveguides are investigated.
Pospiech
Matthias
M
Institute of Quantum Optics, Leibniz UniversitäHannover, Welfengarten 1, D-30167 Hannover, Germany. pospiech@iqo.uni-hannover.de
Emons
Moritz
M
Steinmann
Andy
A
Palmer
Guido
G
Osellame
Roberto
R
Bellini
Nicola
N
Cerullo
Giulio
G
Morgner
Uwe
U