Laser device and opthalmological surgical system

摘要

A laser device, comprising a laser beam emitter having an optical resonator, wherein the optical resonator has a resonator and a reflection mirror, and at least one of a length of the resonator or a curvature of the reflection mirror is determined so as to satisfy condition that a parameter M² of beam quality of a projected laser beam is within a range of 8<=M²<=22, WHERE M²=piW.Theta/lambda (W is a beam waist of a laser beam; Theta is a spreading angle; and lambda is a wavelength of the laser beam).