title: Compensation of spatial dispersion of an acousto-optic deflector with a special Keplerian telescope.
abstract: Compensation of spatial dispersion caused by the acousto-optic deflector (AOD) when using a femtosecond laser is difficult across the whole scanning range of the system, and this is a significant impediment to its use. In conventional methods, the dispersion of the AOD was compensated only when it was at a particular position, while at other positions, the quality of the light beam was reduced. We developed a novel method for compensating the spatial dispersion within the entire scanning range using a special Keplerian telescope. Our experimental results show that the residual dispersion of the AOD is compensated sufficiently, and the focal spots of the laser reach the diffraction limit within a 40-MHz ultrasound bandwidth.
authors.forename: Qinglei
authors.initials: Q
authors.lastname: Hu
authors.forename: Zhenqiao
authors.initials: Z
authors.lastname: Zhou
authors.forename: Xiaohua
authors.initials: X
authors.lastname: Lv
authors.forename: Shaoqun
authors.initials: S
authors.lastname: Zeng