Saturation of the pump-band absorption in Ti:sapphire has been observed by using 10-nsec, π-polarized pulses of 532 nm with fluences up to 4 J/cm2. A Frantz–Nodvik method was used for fitting the data and determining the saturation fluence (7.6 J/cm2) and the absorption cross section (4.9 × 10−20 cm2) at 532 nm. The peak absorption cross section was calculated to be 6.4 × 10−20 cm2 at 490 nm. This value is in reasonably good agreement with other determination methods.
© 1988 Optical Society of America
Original Manuscript: August 24, 1987
Manuscript Accepted: January 26, 1988
Published: May 1, 1988
L. G. DeShazer, K. W. Kangas, and J. M. Eggleston, "Saturation of green absorption in titanium-doped sapphire laser crystals," Opt. Lett. 13, 363-368 (1988)