High power solid-state optical amplification process and system
一种放大系统、光学放大的技术,应用在激光器、激光器装置、激光器零部件等方向
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[0063] figure 1 is a cross-sectional view of a large aperture amplifying crystal 1 with propagating longitudinally propagating and counterpropagating pump beams 3,4. In general, the crystal 1 is right-cylindrical with a disk-shaped surface of diameter φ, thickness L and optical axis 2 . The crystal 1 is pumped longitudinally by one or two longitudinal pump beams 3, 4 for pumping the crystal through two planes. Fluorescent beams can propagate inside the crystal and be reflected off flat and / or outer surfaces. Losses, eg due to diffusion, can occur on the inner surface. However, for a Ti:Sa crystal with reflection coefficient n=1.76, if the incident angle of the beam is greater than 36 degrees, the beam is totally reflected (reflection coefficient R=1) and transverse lasing 5 occurs inside the crystal 1 .
[0064] For reference and future comparison with a dual crystal multipass system and with an embodiment of the present invention, a prior art single crystal amplification s...
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