Bismuth-Doped Phosphate Glasses and H+-Implanted Waveguides

The work reports on the preparation and optical characterization of 75P 2 O 5 -15B 2 O 3 -9Al 2 O 3 -Bi 2 O 3 glass by using the melt-quenching method and absorption spectroscopy, respectively. Further, 0.4-MeV proton implantation of a fluence of 8.0 × 10 16 ions/cm 2 was carried out on this glassy sample and it was tested as a waveguide at a wavelength of 632.8 nm for the first time to our knowledge. The m-line curves of the waveguide were measured before and after successive annealing treatments. The formation theory of the planar waveguides is discussed through simulations of the energy loss distribution and analysis of the reconstructed refractive index profile. The results should be useful in the design and fabrication of bismuth-doped phosphate glass and its use in integrated photonics devices.