An apparatus includes a base that includes a raised surface and a first opening through the raised surface. The apparatus also includes a cover configured to be coupled to the base in order to form a cavity, where the cover includes a second opening through the cover. The raised surface is configured to allow passage of a first portion of optical energy through the first opening and to reflect a second portion of the optical energy. Portions of the cover and the base surrounding the cavity are configured to absorb the reflected second portion of the optical energy. The base may further include one or more baffles positioned around the raised surface, and/or the cover may further include one or more baffles positioned around the second opening.

To prevent an output decrease of laser light due to impurities formed in a Q switch. A laser machining device includes a Q-switch housing section configured by housing a Q switch and a first mirror and a wavelength converting section including a housing in which a transmission window section capable of transmitting a fundamental wave is formed, the wavelength converting section being configured by airtightly housing, with an internal space surrounded by the housing, at least a first wavelength conversion element, a second wavelength conversion element, and a second mirror. A resonator forming a resonant optical path passing through the transmission window section is configured by the first mirror in the Q-switch housing section and the second mirror in the wavelength converting section.

To prevent an output decrease of laser light due to impurities that could be formed in a guide-light emitting device or an imaging device. A laser-light guiding section includes a transmission window section, an optical component disposed to cause an optical path of the UV laser light emitted from the laser-light output section and an optical path of transmitted light transmitted through the transmission window section to cross, and a sealing member in which the transmission window section is provided, the sealing member configuring a sealed space for airtightly housing the optical component. At least one of a guide-light emitting device configured to emit guide light for visualizing a scanning position of the UV laser light toward the transmission window section and an imaging device configured to receive light for imaging a workpiece via the transmission window section is disposed on the outer side of the sealed space.

A planar waveguide laser crystal assembly includes an optical bench and a laser crystal mount mounted on the optical bench. The laser crystal mount includes an upper housing having an interior horizontal surface and an exterior horizontal, a lower housing coupled to the upper housing and having an interior horizontal surface and an exterior horizontal surface, and a cavity defined between the interior horizontal surfaces of the upper and lower housings. A laser crystal is mounted in the cavity of the laser crystal mount. Each of the exterior horizontal surfaces of the upper and lower housings is oriented parallel to a length of the laser crystal. The laser crystal assembly further includes a heat dissipating structure thermally coupled to at least one of the exterior horizontal surfaces of the upper and lower housings to dissipate heat transferred from the laser crystal mount.

An optical system element includes a first enclosure designed for receiving in circulation a functional fluid and at least one inlet and/or outlet window located on the first enclosure and through which a light beam can pass. The inlet and/or outlet window includes two viewports which delimit a spacer cavity adjacent to the first enclosure. The spacer cavity is designed to receive a second fluid with a predetermined optical index and is equipped with a device for adjusting the pressure therein. Degradation of a beam during its passage through the inlet and/or outlet window can be limited by careful selection of the optical index of the second fluid and the pressure in the spacer cavity.

A solid-state laser device includes an inner container, an outer container, a cooling medium supply unit, and a cover section. The inner container in which a laser medium is accommodated includes an inner light-transmitting unit. An outer light-transmitting unit of the outer container is provided at a part that faces the inner light-transmitting unit and is vacuum-insulated from the inner light-transmitting unit. The cooling medium supply unit supplies a cooling medium so that the cooling medium comes in contact with a surface other than a light input and output surface in the laser medium. The cover section partitions a light-passing area from a cooling medium supply area to which the cooling medium is supplied.

A control device that can apply a laser oscillator control device to various types of systems. The control device includes an analog signal input unit configured to receive an output control signal for controlling a laser output of the laser oscillator or a mode control signal for controlling an operation mode of the laser oscillator as an analog signal; a digital signal input unit configured to receive the output control signal or the mode control signal as a digital signal; and a controller configured to transmit a laser command for controlling the laser output to the laser oscillator in response to the output control signal received by the analog signal input unit or the digital signal input unit, and transmit an operation command for operating the laser oscillator to the laser oscillator in the operation mode in response to the mode control signal received by the analog signal input unit or the digital signal input unit.

An optical pulse stretcher includes a separation optical element configured to separate pulsed laser light incident on a first surface thereof into first transmitted light and first reflected light, a reflective optical system configured to guide the first reflected light to be incident on a second surface of the separation optical element that is the surface opposite the first surface, and a holding member that has a through hole having an opening area smaller than the area of a reflective surface of a reflective optical element provided in the reflective optical system, is disposed on the rear side of the reflective optical element, and is configured to hold the reflective optical element.

A laser ignition device includes a laser oscillation optical system that produces pulsed laser light, a condensing optical element that condenses the pulsed laser light into a combustion chamber, a housing that internally contains the condensing optical element, and an optical window that is provided distally with respect to the condensing optical element in the housing and transmits the pulsed laser light. The pulsed laser light is shaped as a ring around an optical axis at least at a light passage position in the optical window.

An apparatus includes a base that includes a raised surface and a first opening through the raised surface. The apparatus also includes a cover configured to be coupled to the base in order to form a cavity, where the cover includes a second opening through the cover. The raised surface is configured to allow passage of a first portion of optical energy through the first opening and to reflect a second portion of the optical energy. Portions of the cover and the base surrounding the cavity are configured to absorb the reflected second portion of the optical energy. The base may further include one or more baffles positioned around the raised surface, and/or the cover may further include one or more baffles positioned around the second opening.