26. Raman spectroscopy of femtosecond laser written low propagation loss optical waveguides in Schott N-SF8 glass
B. Sotillo, A. Chiappini, V. Bharadwaj, M. R. Vazquez, T. T. Fernandez, S. Rampini, M. Ferrari, R. Ramponi, P. Fernandez, B. Gholipour, C. Soci, S. M. Eaton.