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Solid-state laser system
| Details |
Inventors: Watanabe, Mitsuyoshi;
Assignee: Brother Kogyo Kabushiki Kaisha (Nagoya, JP)
Primary Examiner: Davie; James W.
Assistant Examiner:
Attorney, Agent or Firm: Oliff & Berridge
A solid-state laser system includes both a second harmonic generating non-linear optical element and a sum frequency generating non-linear optical element disposed in a laser resonator. Both a second harmonic and a sum frequency radiation can be generated simultaneously on the same axis by a single laser resonator, thereby permitting a reduction in the required number of component parts, easy alignment and a compact construction. A first fundamental wave emitted from a semiconductor laser passes through a sum frequency generating non-linear optical element and is absorbed by a solid state laser rod whereby a second fundamental wave is generated. The generated second fundamental wave thus generated resonates in an optical resonator so as to pass through the sum frequency generating non-linear optical-element, second harmonic generating non-linear optical element and solid state laser rod. A portion of the second fundamental wave is then wavelength-converted in the second harmonic generating non-linear optical element, and, a second harmonic is generated. The generated second harmonic passes through an output mirror and is output to the exterior. The first fundamental wave and the second fundamental wave are then mixed together in the sum frequency generating non-linear optical element to generate a sum frequency radiation. The generated sum frequency radiation passes through the solid-state laser rod, second harmonic generating non-linear optical element and output mirror, and is output to the exterior. |
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DETAILED DESCRIPTION It is an object of the present invention to provide a solid-state laser system of high reliability, which permits reduction in the required number of parts and easy alignment.
According to the present invention, for achieving the aforementioned object and to overcome the above-mentioned problems, in a solid-state laser system wherein the wavelength of a fundamental wave generated by a laser medium is converted by a non-linear optical element to generate a higher harmonic, a laser resonator includes both a second harmonic generating non-linear optical element and a sum frequency generating non-linear optical element.
In the solid-state laser system of the present invention having the above construction, both a second harmonic and a sum frequency radiation are generated simultaneously on the same axis by means of a single laser resonator.
In addition, the second harmonic and the sum frequency radiation are independently subjected to an output modulation.
Thus, even if two wavelengths of laser beams are required, it is not necessary to provide both a second harmonic generating solid-state laser system and a sum frequency generating solid-state laser system, unlike the prior art, thus permitting great reduction in the required number of parts and the provision of a compact solid-state laser system of high reliability.
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MEMS 
