The nonlinear absorption coefficient of As2S3 glass has been measured to be 2.0 cm/GW for femtosecond pulses at 800 nm. Femtosecond laser structuring via two photon absorption in bulk As2S3 glass by erasable and permanent photo-darkening is demonstrated using both holographic and direct multi-beam laser writing.
MRS Proceedings: proceedings of the Materials Research Society Spring Meeting: Symposium I: Materials and Processes for Nonvolatile Memories II, San Francisco, United States, 10-13 April 2007,
Vol. 997, pp. 357-362