Abstract: There is provided a multi-beam laser apparatus including: a laser beam source generating a beam; an incident lens disposed on a path of the beam; a beam splitter splitting the beam incident on the incident lens into a plurality of beamlets; and a beam path adjustor disposed on each of paths of the split beamlets to change the respective paths of the split beamlets. The multi-beam laser apparatus easily produces a plurality of beamlets and adjusts paths of the beamlets obtained by a prism to improve machinability quality and uniformity.

Abstract: There is provided an optical parametric oscillator capable of converting a wavelength in a broader range and generating an output beam with high efficiency. The optical parametric oscillator includes: a non-linear optical material optical parametrically converting a beam pumped from a laser; and input and output optical devices opposing each other, the input and output optical devices guiding the optical parametrically-converted beam to the non-linear optical material to oscillate, wherein the input optical device includes an input optical mirror guiding the pumping beam into the oscillator, and the output optical device includes a plurality of output optical mirrors each guiding the optical parametrically-converted beam outside the oscillator, the output optical mirrors having reflectivities different from one another with respect to a wavelength of the optical parametrically-converted beam.

Abstract: a wavelength converted laser apparatus includes a laser oscillator emitting an excitation laser beam having a first wavelength, a harmonic wave generator converting the excitation laser beam into a beam having a second wavelength lower than the first wavelength and an optical parametric oscillator converting and outputting the beam having the second wavelength into a beam having a continuously selectable specific wavelength. The optical parametric oscillator has an OPO crystal, a SHG crystal disposed at an output terminal of the optical parametric oscillator crystal to generate a second harmonic beam and a pair of high reflectivity mirrors for amplifying the beam outputted from the optical parametric oscillator.

Abstract: There is provided a method of manufacturing an optical waveguide, the method including: allowing a beam to be incident in an optical waveguide direction of an optical waveguide material; generating an optical solution in the optical waveguide material by adjusting intensity of the incident beam according to the optical waveguide material; allowing the incident beam to be re-incident at an intensity higher than an intensity of the incident beam after checking generation of the optical solution in the optical waveguide material; and increasing a refractive index of an optical solution-generating area of the optical waveguide material by the re-incident beam to thereby form an optical waveguide.