Abstract

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

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