Inter-university Research Institute Corporation National Institutes of Natural Sciences

Inter-university Research Institute Corporation National Institute of Natural Sciences

Lihe Zheng

Takunori Taira

Arvydas Kausas

A method for manufacturing an optical element is a method for manufacturing an optical element in which laser light is transmitted, reciprocated, or reflected, and the method includes a first step of obtaining a bonded element formed by subjecting a first element part and a second element part, both being transparent to laser light, to surface activated bonding with a non-crystalline layer interposed therebetween; and after the first step, a second step of crystallizing at least a portion of the non-crystalline layer by raising the temperature of the bonded element. In the second step, the temperature of the bonded element is raised to a predetermined temperature that is lower than the melting points of the first element part and the second element part.

Method for manufacturing optical element and optical element

A laser component is provided, including a laser medium and a transparent heat transmitting member, at least one of which is oxide. Bonding surfaces of the laser medium and the transparent heat transmitting member are exposed to oxygen plasma, and thereafter the bonding surfaces are brought into contact without heating. The laser medium and the transparent heat transmitting member are bonded at atomic levels, their thermal resistance is low, and no large residual stress is generated due to the bonding taking place under normal temperature. The process of oxygen plasma exposure ensures transparency of their bonding interface. The laser medium and the transparent heat transmitting member are stably bond via an amorphous layer.

Laser component

Provided is a passive Q-switch laser device possessing a power density controller () making power density of excitation light from an excitation light source () equal to or greater than power density so that delay time required for reaching oscillation after start of excitation of a laser gain medium () becomes equal to or shorter than a laser upper energy level lifetime of the laser gain medium ().

Growing community of inventors

Okazaki, Japan

Lihe Zheng