Strong waveguide Bragg gratings (10.5 dB transmission dip) were fabricated using the femtosecond (fs) laser direct-write technique in ZBLAN glass. The Bragg gratings are based on depressed cladding waveguides and consist of planes, periodic according to the Bragg condition, which are constructed from a transverse hexagonal lattice of smaller point features. Such gratings are a key step toward the realization of mid-infrared monolithic waveguide lasers using the fs laser direct-write technique.
© 2012 Optical Society of America
Original Manuscript: July 9, 2012
Manuscript Accepted: August 17, 2012
Published: September 20, 2012
Simon Gross, Martin Ams, David G. Lancaster, Tanya M. Monro, Alexander Fuerbach, and Michael J. Withford, "Femtosecond direct-write überstructure waveguide Bragg gratings in ZBLAN," Opt. Lett. 37, 3999-4001 (2012)