1. Raman gain from waveguides inscribed in KGd(WO₄)₂ by high repetition rate femtosecond laser
- Author
-
Eaton, S. M., Merchant, C. A., Iyer, R., Zilkie, A. J., Helmy, A. S., Aitchison, J. S., Herman, P. R., Kraemer, D., Miller, R. J. D., Hnatovsky, C., Taylor, R. S., Eaton, S. M., Merchant, C. A., Iyer, R., Zilkie, A. J., Helmy, A. S., Aitchison, J. S., Herman, P. R., Kraemer, D., Miller, R. J. D., Hnatovsky, C., and Taylor, R. S.
- Abstract
We report the formation of waveguides in Raman-active KGd(WO₄)₂ with a focused, high repetition rate femtosecond laser. Parallel guiding regions, formed to either side of the laser-induced damage track, supported TE and TM modes that coupled efficiently to optical fiber at telecom wavelengths. Micro-Raman spectroscopy of the guiding regions revealed the preservation of the characteristic 768 and 901cm¯¹ Raman mode intensities. Raman gain with 6% efficiency was demonstrated for the 768cm¯¹ Raman line by pumping the waveguide with an infrared 80ps source, the first time Raman gain has been reported in laser formed waveguides.
- Published
- 2008