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1. 发明授权

US5708672A Dual wavelength solid state laser 失效
标题翻译：双波长固态激光器
公开(公告)号：US5708672A
公开(公告)日：1998-01-13
申请号：US593251
申请日：1996-01-29
申请人： Maurice A. Pessot , David E. Hargis
发明人： Maurice A. Pessot , David E. Hargis
IPC分类号： H01S3/06 , H01S3/08 , H01S3/0941 , H01S3/16 , H01S3/10
CPC分类号： H01S3/0627 , H01S3/0604 , H01S3/0809 , H01S3/094053 , H01S3/09415 , H01S3/1611 , H01S3/1673
摘要： A dual wavelength continuous wave (cw) solid state microlaser device that provides simultaneous laser action at a first and a second wavelength. The laser comprises a solid state gain material including a rare earth element having a first gain transition at the first wavelength and a second gain transition at the second wavelength. The gain material defines a block having a first face and a second, opposite face. A first reflective surface that is substantially reflective at both the first and second wavelengths is closely coupled to the first face. An output coupler provides a second reflective surface that is partially reflective at both the first and the second wavelengths, which is oriented with respect to the first reflective face to define an optical cavity through the first and second faces of the solid state gain material. An optical pump source is provided to end pump the solid state gain material with continuous pump radiation at a pump wavelength that is highly absorptive by the gain material. In some embodiments, the first reflective surface may be formed directly on the first face of the solid state gain material, and the second reflective surface may be formed directly on the second face of the solid state gain material. The resultant laser beam comprises two wavelengths each of which is believed to have a single longitudinal mode. In some embodiments the solid state gain material comprises a uniaxial crystal oriented within the optical cavity to provide polarized emissions for the first and second wavelengths.
摘要翻译：双波长连续波（cw）固态微激光器装置，其在第一和第二波长处提供同时激光作用。激光器包括固体增益材料，其包括具有第一波长的第一增益跃迁和第二波长的第二增益跃迁的稀土元素。增益材料限定具有第一面和第二相对面的块。在第一和第二波长处基本反射的第一反射表面紧密耦合到第一面。输出耦合器提供第二反射表面，该第二反射表面在第一和第二波长处是部分反射的，其相对于第一反射面定向，以限定通过固态增益材料的第一和第二面的光学腔。提供光泵浦源，以在泵浦波长处以增益材料高吸收的连续泵浦辐射泵送固态增益材料。在一些实施例中，第一反射表面可直接形成在固态增益材料的第一面上，并且第二反射表面可以直接形成在固态增益材料的第二面上。所得到的激光束包括两个波长，每个波长被认为具有单个纵向模式。在一些实施例中，固态增益材料包括在光腔内定向的单轴晶体，以提供第一和第二波长的极化发射。

2. 发明授权

US5802086A Single cavity solid state laser with intracavity optical frequency mixing 失效
标题翻译：单腔固态激光器具有腔内光频混频
公开(公告)号：US5802086A
公开(公告)日：1998-09-01
申请号：US593094
申请日：1996-01-29
申请人： David E. Hargis , Maurice A. Pessot
发明人： David E. Hargis , Maurice A. Pessot
IPC分类号： H01S3/06 , H01S3/08 , H01S3/108 , H01S3/10
CPC分类号： H01S3/108 , H01S3/0604 , H01S3/0615 , H01S3/0627 , H01S3/08086 , H01S3/0809 , H01S3/094053
摘要： A composite cavity continuous wave (cw) microlaser that lases at two fundamental wavelengths, denoted by .lambda..sub.1 and .lambda..sub.2, which are frequency-mixed in a suitable nonlinear crystal oriented within an optically resonant cavity for phase-matched frequency mixing to generate radiation at a third wavelength. The optically resonant cavity is defined by a first reflective surface and a second reflective surface, both of which are substantially reflective at a first and a second wavelength. A highly absorbing solid-state gain material, preferably Nd:YVO.sub.4, which has a first gain transition at the first wavelength and a second gain transition at the second wavelength different from the first wavelength is disposed within the optically resonant cavity. The highly absorbing solid-state gain material is closely coupled to the first reflective surface to promote single mode operation of both fundamental lasing frequencies. An optical pump source is optically coupled through the first reflective face to end-pump the solid-state gain material with continuous pump radiation at a pump wavelength that is highly absorptive by the gain material. In some embodiments, the solid-state gain material has an input face that includes the first reflective surface and the nonlinear crystal has an output face that includes the second reflective surface.
摘要翻译：复合空腔连续波（cw）微激光器，其在两个基本波长处发射，由λ1和λ2表示，其被频率混合在定向在光学谐振腔内的适当的非线性晶体中，用于相位匹配的频率混合以产生辐射第三波长。光学谐振腔由第一反射表面和第二反射表面限定，两者都在第一和第二波长处基本上是反射的。具有第一波长的第一增益跃迁和不同于第一波长的第二波长的第二增益跃迁的高吸收固态增益材料，优选地，Nd：YVO4设置在光学谐振腔内。高吸收性固体增益材料紧密耦合到第一反射表面以促进两个基本激光频率的单模操作。光泵浦源通过第一反射面光学耦合，以固体增益材料以泵浦波长的连续泵浦辐射来泵浦固体增益材料，泵浦波长由增益材料高度吸收。在一些实施例中，固态增益材料具有包括第一反射表面的输入面，并且非线性晶体具有包括第二反射表面的输出面。

3. 发明授权

US06816534B2 Tunable single frequency filter for lasers 失效
标题翻译：可调谐单频滤波器
公开(公告)号：US06816534B2
公开(公告)日：2004-11-09
申请号：US10138091
申请日：2002-05-03
申请人： Graham W. Flint , Maurice A. Pessot , Eric B. Takeuchi
发明人： Graham W. Flint , Maurice A. Pessot , Eric B. Takeuchi
IPC分类号： H01S308
CPC分类号： H01S3/08004 , H01S3/08027 , H01S3/1062 , H01S3/1608 , H01S3/1618 , H01S3/17
摘要： A single frequency filter for a laser, comprising a polarizer that defines a direction of polarization and one or more birefringent elements situated within the cavity with their dielectric axes offset from the direction of polarization. The ends of the birefringent elements have a finite reflectance, and may be coated for reflectance or left uncoated. In some embodiments the filter is situated in a laser cavity with a broadband gain medium, in other embodiments, the filter is situated in an external cavity. To provide tunability, a wavelength control system is coupled to the birefringent element. An embodiment is described in which the filter comprises two birefringent elements of unequal optical length along the optical axis, which advantageously reduces the voltage required to tune the frequency. To provide tunability, the first and second birefringent elements are both coupled to a wavelength control system that simultaneously controls both elements.

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