title: Large deflection angle, high-power adaptive fiber optics collimator with preserved near-diffraction-limited beam quality.
abstract: We report on the development of a monolithic adaptive fiber optics collimator, with a large deflection angle and preserved near-diffraction-limited beam quality, that has been tested at a maximal output power at the 300 W level. Additionally, a new measurement method of beam quality (M2factor) is developed. Experimental results show that the deflection angle of the collimated beam is in the range of 0-0.27 mrad in the X direction and 0-0.19 mrad in the Y direction. The effective working frequency of the device is about 710 Hz. By employing the new measurement method of the M2factor, we calculate that the beam quality is Mx2=1.35 and My2=1.24, which is in agreement with the result from the beam propagation analyzer and is preserved well with the increasing output power.
authors.forename: Dong
authors.initials: D
authors.lastname: Zhi
authors.forename: Yanxing
authors.initials: Y
authors.lastname: Ma
authors.forename: Zilun
authors.initials: Z
authors.lastname: Chen
authors.forename: Xiaolin
authors.initials: X
authors.lastname: Wang
authors.forename: Pu
authors.initials: P
authors.lastname: Zhou
authors.forename: Lei
authors.initials: L
authors.lastname: Si