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Laser with high quality and stable output beam and long-lived, high conversion efficiency nonlinear crystal
Laser with high quality and stable output beam and long-lived, high conversion efficiency nonlinear crystal
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机译:具有高质量,稳定输出光束和长寿命,高转换效率的非线性晶体的激光器
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摘要
A mode-locked laser system operable at low temperature can include an annealed, frequency-conversion crystal and a housing to maintain an annealed condition of the crystal during standard operation at the low temperature. In one embodiment, the crystal can have an increased length. First beam shaping optics can be configured to focus a beam from a light source to an elliptical cross section at a beam waist located in or proximate to the crystal. A harmonic separation block can divide an output from the crystal into beams of different frequencies separated in space. In one embodiment, the mode-locked laser system can further include second beam shaping optics configured to convert an elliptical cross section of the desired frequency beam into a beam with a desired aspect ratio, such as a circular cross section.
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