Mid-infrared spectral broadening in an ultrafast laser inscribed gallium lanthanum sulphide waveguide
2012
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.
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