RESUMO
A 2.0-mJ/pulse, 2-nsec, single-longitudinal-mode Ti:sapphire laser oscillator has been demonstrated in a compact grazing-incidence cavity configuration similar to a Littman arrangement. The oscillator's output beam quality is TEM(00), making it attractive for doubling and mixing applications. With currently available optics the laser is tunable over greater than 2500 cm(-1) from 746 to 918 nm.
RESUMO
Saturation of the pump-band absorption in Ti:sapphire has been observed by using 10-nsec, pi-polarized pulses of 532 nm with fluences up to 4 J/cm(2). A Frantz-Nodvik method was used for fitting the data and determining the saturation fluence (7.6 J/cm(2)) and the absorption cross section (4.9 x 10(-20)cm(2)) at 532 nm. The peak absorption cross section was calculated to be 6.4 x 10(-20) cm(2) at 490 nm. This value is in reasonably good agreement with other determination methods.
