Systems, devices, and methods for focusing laser projectors are described. A laser projector includes N≧1 laser diodes, each of which emits laser light having a divergence. Each laser diode is paired with a respective primary or collimation lens to at least reduce a divergence of the laser light that the laser diode produces. Downstream from the primary lens(es) in the optical path(s) of the laser light, a single dedicated secondary or convergence lens converges the laser light to a focus. By initiating the convergence of the laser light at the secondary or convergence lens as opposed to at the primary or collimation lens(es), numerous benefits that are particularly advantageous in laser projection-based wearable heads-up displays are realized.

A light-emitting device for increasing power by combining beams from a plurality of light sources and for improving focusing performance including a plurality of light sources; and a light-outputting device for generating collimated beams for respective emitted lights from the plurality of light sources and for outputting enlarged beams wherein the beam diameters of the respective collimated beams have been enlarged in the direction wherein the beam diameters are small.

In various embodiments, optical repositioners and/or angled dispersive elements are utilized to manipulate portions of an input laser beam emitted by a group of laser emitters in order to form a multi-wavelength output beam having a high beam quality factor.

An electronic device including an optical system that combines a first lens and a second lens by means of a beam splitter.

A structured light generator includes a light source configured to emit light, and a first meta optical device including a first metasurface including nanostructures having sub-wavelength dimensions that are less than a wavelength of the light emitted from the light source, the first metasurface being configured to form a distribution of light rays from the light emitted from the light source to thereby radiate structured light.

Laser diodes formed on a common substrate with layers of suitable thickness and refractive indices produce output beams that are coherently coupled. A phase mask can be situated to produce phase differences in one or more of the output beams to produce a common wavefront phase. The phase-corrected beams propagate with reduced angular divergence than conventional lasers that are not coherently coupled, and the coherently coupled laser diodes can provide higher beam brightness, enhanced beam parameter product, and superior power coupled into doped fibers in fiber lasers.

Provided is a laser processing method including overlapping a plurality of plate-shaped members that include a first plate-shaped member disposed on one end side of an overlapping direction and a second plate-shaped member disposed on the other end side of the overlapping direction; branching a laser beam into a first branched laser beam and a second branched laser beam; irradiating the first plate-shaped member with the first branched laser beam and the second branched laser beam in a state where the first branched laser beam and the second branched laser beam are emitted in parallel; forming line-shaped melting portions on the first plate-shaped member by moving the branched laser beams in a direction intersecting a direction in which the branched laser beams are aligned; and joining overlapped plate-shaped members in a state where the melting portion formed by using the first branched laser beam and the melting portion formed by using the second branched laser beam are connected to each other in the second plate-shaped member and the melting portions do not penetrate the second plate-shaped member.

Systems and methods for laser processing using a modified laser beam having a non-Gaussian energy distribution are described herein In some embodiments, a laser processing system includes a laser source that outputs a laser beam having a Gaussian energy distribution, and a beam modifier positioned in a path of the output beam. The beam modifier controllably modifies the Gaussian energy distribution of the output laser beam along at least one axis perpendicular to the beam's axis of travel. In various embodiments, the laser processing system includes a beam delivery sub-subsystem that operates in a raster mode. In such embodiments, the subsystem can raster the modified beam across a material to form raster lines for transferring an image or pattern to the material.

An example laser system includes a laser source to transmit a source light generated based on optical feedback provided by a laser cavity. The laser system further includes a beam-splitter to split the source light into a reference light and a split source light. The laser system further includes a modulator to modulate the split source light's frequency. The modulated light may be transmitted towards and reflected from a target. The modulator and beam-splitter may receive, frequency-modulate, and pass the reflected light to the laser cavity. The laser cavity amplifies the reflected light and transmits the amplified light toward the beam-splitter, such that the amplified light follows a same path as the reference light. The laser system further includes a detector to receive the reference light and amplified light, and detect a beating frequency as an indication of presence of the reflected light. Related methods and devices are also disclosed.

There is provided a light-guide, compact collimating optical device, including a light-guide having a light-waves entrance surface, a light-waves exit surface and a plurality of external surfaces, a light-waves reflecting surface carried by the light-guide at one of the external surfaces, two retardation plates carried by light-guides on a portion of the external surfaces, a light-waves polarizing beamsplitter disposed at an angle to one of the light-waves entrance or exit surfaces, and a light-waves collimating component covering a portion of one of the retardation plates. A system including the optical device and a substrate, is also provided.