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Mid-infrared spectral broadening in an ultrafast laser inscribed gallium lanthanum sulphide waveguide
John E McCarthy1, Henry T Bookey, Nicholas D Psaila
1Scottish University Physics Alliance, Department of Physics, School of Engineering and Physical Sciences, Heriot-Watt University, Edinburgh, United Kingdom.
Optics Express
|January 26, 2012
Abstract:
We report the successful fabrication of mid-infrared waveguides written in a gallium lanthanum sulphide (GLS) substrate via the ultrafast laser inscription technique. Single mode guiding at 2485 nm and 3850 nm is observed. Spectral broadening spanning 1500 nm (-15dB points) is demonstrated under 3850 nm excitation.
