Abstract

We report on proton beam writing of chalcogenide glass for the fabrication of channel waveguides. The focused proton beam at an energy of 1 MeV induces positive refractive index changes, forming channel waveguide structures in the irradiated region. The channel waveguides support both the TE and TM polarizations from the visible to near-infrared telecommunication O and C bands. Based on the maximum value of the refractive index contrast achieved by measuring the numerical aperture of the waveguide channels, we reconstruct the refractive index distribution and calculate the modal profiles of waveguides in the near-infrared wavelengths. The calculated modal profiles are in very good agreement with the experimental results. The minimum propagation loss is measured to be ∼2.0 dB/cm at the wavelength of 1064 nm.

© 2014 IEEE

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