Optical limiter with small limiting threshold value
An optical limiting and threshold technology, which is applied in the directions of instruments, optics, nonlinear optics, etc., to achieve the effects of simple optical path, good optical limiting effect and low cost.
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[0016] The present invention will be further described below in conjunction with the accompanying drawings.
[0017] Such as figure 1 Shown is a light limiter with a low clipping threshold, including a beam expander collimator system, a radially polarized light generation system and an optical limiter system, the beam expander collimator system includes a concave lens 2 and a convex lens 3, the The radially polarized light generation system includes a liquid crystal polarization converter 4, a beam analyzer 6, and a beam splitter 7, and the optical limiting system includes a B convex lens 8, a nonlinear absorption sample 9, a C convex lens 10, and an energy detector 11, so The nonlinear absorption sample 9 is placed between the B convex lens 8 and the C convex lens 10, and is placed on the focal plane of the B convex lens 8 and the C convex lens 10; the laser beam 1 output by the laser passes through the concave lens 2 and the A convex lens 3 in sequence and then expands the b...
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