46 results about "Beam parameter product" patented technology

An optical delivery waveguide for a material laser processing system includes a small lens at an output end of the delivery waveguide, transforming laser beam divergence inside the waveguide into a spot size after the lens. By varying the input convergence angle and / or launch angle of the laser beam launched into the waveguide, the output spot size can be continuously varied, thus enabling a continuous and real-time laser spot size adjustment on the workpiece, without having to replace the delivery waveguide or a process head. A divergence of the laser beam can also be adjusted dynamically and in concert with the spot size.

The invention concerns an optical device and its application to generate an adjustable wave front deformation of a laser beam and thus to generate an adjustable beam spot geometry in the focal plane of laser optics. For this purpose, a device is provided which allows adjusting and modifying a laser beam in such a way that a beam spot, the shape of which can be adjusted continuously based on the original focal shape, is generated after focusing the beam, i.e. at least one dimension parameter of the shape of the beam spot has to be variable and adjustable so that the beam parameter product of the beam can also be modified without having to modify the focal position.

The invention relates to a homogenization device of a product of the beam parameters of a semiconductor laser array fast-slow shaft, belonging to the application field of laser technology and including a group of semiconductor laser array fast-slow shaft aligning micro-lens unit, a flat glass pile A, B and a focusing lens set. The light passing through the fast-slow shaft aligning micro-lens vertically injects on the flat glass pile A, a beam is divided into a plurality of portions and generates refraction excursion in the flat glass corresponding to each beam to obtain linear beams distributed in a ladder shape along the direction of the fast shaft of the laser array. The ladder shape linear beams pass through the flat glass pile B and the beams are led to generate reflection excursion along the direction of the slow shaft of the array and are further redistributed as linear beams according to a same beam recombining principle; therefore, the beams given out by the semiconductor laser array have a more approximate beam parameter product on the fast-slow shaft, namely, a balanced beam quality in the fast-slow shaft direction. Finally, a uniform focusing spot with high power density and brightness in the fast-slow shaft direction can be obtained by the focusing of the focusing lens set.

A laser processing machine includes a beam parameter product variable device, and a beam diameter variable device. The beam parameter product variable device sets beam parameter products of a laser beam to a predetermined value. The beam diameter variable device includes a first lens that is movable in an optical axis direction and having a positive focal length, and converts divergent light of a laser beam emitted from an emission end of the laser beam into convergent light, and a second lens that is movable in the optical axis direction and having a negative focal length on which the convergent light is incident. A third lens having a positive focal length, focuses the laser beam emitted from the beam diameter variable device, and irradiates a plate material with the focused laser beam.

In various embodiments, a stepped-cladding fiber having a central core, a first cladding, a ring core, and a second cladding is utilized to tune the beam parameter product and / or numerical aperture of the laser beam.

Equipped with: a light source unit (3), which emits excitation light (101); a light deflection unit (140), which deflects the excitation light (101); a wavelength conversion unit (160), which is irradiated with the excitation light deflected by the light deflection unit (140) (101), convert the excitation light (101) into wavelength converted light with different wavelengths to emit; ), the first optical system (11) arranged between the light source part (3) and the light deflection part (140), and the first optical system (11) arranged between the light deflection part (140) and the wavelength conversion part (160) Two optical systems (12) constitute, in the section perpendicular to the direction of travel of the excitation light (101), the axis of the direction in which the beam parameter product of the excitation light (101) becomes the minimum is set as the Ax axis, and the axis perpendicular to the Ax axis is When the axis of the direction is the Ay axis, in the second optical system (12), the focus distance in the Ay axis direction is smaller than the focus distance in the Ax axis direction.