Optical power limiter utilizing nonlinear refraction
First Claim
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1. In combination with an optical system having input and output lenses and an optical path for radiation within a given spectrum therebetween defining a focal point for said radiation, a power limiter comprising:
- a housing member surrounding said focal point;
first and second cells of dielectric material, transparent to said spectrum and having a large third order susceptibility to electric polarization, mounted within said housing, said cells having positive and negative third order susceptibilities, respectively, with the positive first cell closest to said input lens.
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Abstract
A power limiter is provided consisting of two cells of optically transparent material having a low index of refraction, but a large third order susceptibility to electric polarization. The input cell has a positive susceptibility which self-focuses intense radiation beams (i.e., laser beams) and the output cell has a negative susceptibility which scatters the even more intense self-focused beam by self-defocussing.
31 Citations
5 Claims
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1. In combination with an optical system having input and output lenses and an optical path for radiation within a given spectrum therebetween defining a focal point for said radiation, a power limiter comprising:
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a housing member surrounding said focal point; first and second cells of dielectric material, transparent to said spectrum and having a large third order susceptibility to electric polarization, mounted within said housing, said cells having positive and negative third order susceptibilities, respectively, with the positive first cell closest to said input lens. - View Dependent Claims (2, 3, 4, 5)
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Specification
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Current AssigneeUnited States Of America As Represented By The Secretary Of The Army (Government of the United States of America)
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Original AssigneeThe United States Of America As Represented By The Secretary Of The Army
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InventorsWood, Gary L., Miller, Mary J., Sharp, Edward J., Shurtz, Richard R. II
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Primary Examiner(s)Moskowitz, Nelson
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Application NumberUS07/268,461Time in Patent Office4,032 DaysField of Search350/311-313, 350/316, 350/168, 372/21, 372/703, 329/144, 351/213, 359/738, 359/890US Class Current359/890CPC Class CodesG02F 1/3511 Self-focusing or self-trapp...
