A laser system (10) for generating a linear laser marking (34) on a projection surface (33), including a laser beam source (11), which generates a laser beam (25) and emits it along a propagation direction (26), a first beam shaping optical unit (12) embodied as a collimation optical unit and having a first optical axis (13), and a conical mirror (14) which is embodied as a right cone having a cone axis (15) and a reflective lateral surface (22) and is arranged in the beam path of the laser beam downstream of the collimation optical unit (12), wherein the cone axis (15) is oriented parallel to the first optical axis (13). The laser system (10) includes a second beam shaping optical unit (16), which is arranged in the beam path of the laser beam upstream of the conical mirror (14) and reshapes the laser beam into a ring beam (28) having an intensity minimum in the center of the beam.

A near-eye display device comprises a pupil-expansion optic, first and second lasers, a drive circuit coupled operatively to the first and second lasers, a beam combiner, a spatial light modulator (SLM), and a computer. The first and second lasers are configured to emit in respective first and second wavelength bands. The beam combiner is configured to geometrically combine emission from the first and second lasers into a collimated beam. The SLM is configured to receive the collimated beam and to direct the emission in spatially modulated form to the pupil-expansion optic. The computer is configured to parse a digital image, trigger the emission from the first and second lasers by causing the drive circuit to drive current through the first and second lasers, and control the SLM such that the spatially modulated form of the emission projects an optical image corresponding to the digital image.

A control method for a spatial light modulator for an exposure apparatus having a projection optical system having an optical elements a state of each of which is allowed to be changed, the method sets states of optical elements located in a first area to a first distribution in which a first optical element in a first state and a second optical element in a second state are distributed in a first distribution pattern so that one portion of a light from the optical elements located in the first area enters the projection optical system and setting states of optical elements located in a second area to a second distribution in which the first optical element and the second optical element are distributed in a second distribution pattern to reduce a deterioration of the pattern image caused by a light that enters the projection optical system from the first area.

An optical arrangement converts an input laser beam into a line-like output beam, which propagates along a propagation direction and which has, in a working plane, a line-like beam cross section extending along a line direction. The optical system includes: a reshaping optical unit having an input aperture, through which the input laser beam is radiated, and an elongate output aperture, elongatedly extending along an aperture longitudinal direction, the reshaping optical unit converting the input laser beam radiated through the input aperture into a beam packet exiting through the output aperture; and a homogenization optical unit which converts the beam packet into the line-like output beam, different beam segments of the beam packet being intermixed and superimposed along the line direction. The aperture longitudinal direction extends in a manner rotated about the propagation direction by a non-vanishing angle of rotation with respect to the line direction.

The disclosure describes various aspects of techniques for elliptical beam design using cylindrical optics that may be used in different applications, including in quantum information processing (QIP) systems. In an aspect, the disclosure describes an optical system having a first optical component having a first focal length, a second optical component having a second focal length and aligned with a first direction, and a third optical component having a third focal length and aligned with a second direction orthogonal to the first direction. The optical system is configured to receive one or more optical beams (e.g., circular or elliptical) and apply different magnifications in the first direction and the second direction to the one or more optical beams to image one or more elliptical Gaussian optical beams. A method for generating elliptical optical beams using a system as the one described above is also disclosed.

A method of processing by controlling one or more beam characteristics of an optical beam may include: launching the optical beam into a first length of fiber having a first refractive-index profile (RIP); coupling the optical beam from the first length of fiber into a second length of fiber having a second RIP and one or more confinement regions; modifying the one or more beam characteristics of the optical beam in the first length of fiber, in the second length of fiber, or in the first and second lengths of fiber; confining the modified one or more beam characteristics of the optical beam within the one or more confinement regions of the second length of fiber; and/or generating an output beam, having the modified one or more beam characteristics of the optical beam, from the second length of fiber. The first RIP may differ from the second RIP.

A beam shaping method and device employing full-image transfer for planar light sources. The method comprises: using multiple first lenses to respectively magnify and image beams emitted by multiple planar light sources, so as to obtain magnified full images of the multiple planar light sources; and seamlessly stitching together the magnified full images of the multiple planar light sources at a primary imaging position, so as to obtain a seamless light source at the primary imaging position. The beam shaping method for the planar light sources achieves the elimination of gaps between the light sources with almost no loss of optical power by means of full-image transfer and seamless stitching, thereby improving the beam quality of the light sources as a whole. This kind of optical shaping method is suitable for shaping and processing planar light sources such as VCSEL and LED.

A fractional handpiece and systems thereof for skin treatment include a passively Q-switched laser assembly operatively connected to a pump laser source to receive a pump laser beam having a first wavelength and a beam splitting assembly operable to split a solid beam emitted by the passively Q-switched laser assembly and form an array of micro-beams across a segment of skin. The passively Q-switched laser assembly generates a high power sub-nanosecond pulsed laser beam having a second wavelength.

A spiral phase plate, according to one embodiment, for generating a Laguerre Gaussian beam by reflecting an incident beam emitted from a light source, may comprise: a first quadrant area in which the step height increase rate per unit angle decreases progressively in one direction from the point with the lowest step height to the point with the highest step height; and a second quadrant area in which the step height increase rate per unit angle increases progressively in the one direction.

A coaxial laser light source apparatus includes at least one laser light source module, a beam homogenizer, and optical path adjusting elements. The laser light source module includes multiple laser light sources arranged along a first direction, and each of the laser light sources is configured to emit a laser light along a second direction. The first direction is substantially perpendicular to the second direction, and the laser lights have different properties. The laser lights travel along the second direction toward the beam homogenizer coaxially. The optical path adjusting elements are located between the laser light sources and the beam homogenizer, and the optical path adjusting elements are configured to adjust traveling directions of the laser lights.