Abstract
Nonlinear spectral broadening to , from an initial width of , has been demonstrated in gallium lanthanum sulphide glass waveguides from , pulses at /pulse. A formation mechanism is presented for these femtosecond laser written waveguides, based on optical characterization and comparisons to previous work. Two different types of waveguide are identified. One has a characteristic long narrow structure and is formed through filamentation caused by self-focusing. The other has a characteristic “teardrop” structure, which is formed by a type IIA photosensitivity mechanism and cumulative heating of glass around a central laser-exposed region.
© 2009 Optical Society of America
Full Article | PDF ArticleMore Like This
Alexander M. Streltsov and Nicholas F. Borrelli
J. Opt. Soc. Am. B 19(10) 2496-2504 (2002)
John E. McCarthy, Henry T. Bookey, Nicholas D. Psaila, Robert R. Thomson, and Ajoy K. Kar
Opt. Express 20(2) 1545-1551 (2012)
P. Nandi, G. Jose, C. Jayakrishnan, S. Debbarma, K. Chalapathi, K. Alti, A. K. Dharmadhikari, J. A. Dharmadhikari, and D. Mathur
Opt. Express 14(25) 12145-12150 (2006)