Laser light generating device and method of fabricating the same

Abstract

A laser beam generator which improves the stability against vibration and change with time and reduces influence of temperature change on a resonator. The laser beam generator (1) includes a pumping light source (2) for generating pumping light of a continuous wave and a solid laser resonator (4) utilizing thermal lens effect caused by produced heat at the pumping position. The solid laser resonator comprises a laser medium (4a), a saturable absorber (4b), an intermediate medium (4c), and a reflecting means (4d). Combining the substrate of the laser medium (4a) and that of the saturable absorber (4b) into one unit leads to reduction in vibration influence. A structure substantially immune to thermal influence of temperature change without the need for a method for selecting the operating point by using temperature change is used. With respect to the positional relation between the pumping optical system and the resonator, they are moved relatively to adjust the optical path length of the resonator, and thereby a stable operating point can be selected.

Description

technical field [0001] The present invention relates to a laser generating device equipped with a solid laser resonator including a laser medium, which is used to facilitate fine adjustment of devices during assembly, to improve characteristic stability and anti-vibration performance, and to be difficult to be affected by environmental changes and time-dependent changes impacted technology. Background technique [0002] A passive Q-switch or mode-locked pulse light source for continuous wave excitation is equipped with a structure including a laser medium (Nd:YVO4, etc.) and a saturable absorber (Saturable absorber). Especially in the case of short pulses or in order to increase the repetition rate, in order to shorten the length of the resonator, the two are often used in close contact with each other. (For example, refer to Patent Document 1) [0003] Taking a small pulsed laser composed of a laser medium and a saturable absorber as an example, in order to shorten the le...

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Problems solved by technology

In addition, it becomes easily affected by mechanical vibration, increases instability, and is accompanied by a disadvantage that the operating point such as the output and pulse repetition frequency changes greatly due to a slight change in the length of the resonator over time (stable sexual decline)

[0020] In addition, in the structural form in which an intermediate such as a spacer or spacer is inserted between the laser medium and the saturable absorber, although there is no direct heat conduction from the laser medium to the saturable absorber, heat is transferred through the intermediate For saturable absorbers, generally speaking, the problem of temperature rise in laser media with low thermal conductivity or saturable absorbers remains

In addition, since a thin gasket must be used, problems (penetration, etc.) caused by the surface tension of the adhesive will occur during bonding, resulting in difficulty in manufacturing.

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