发明名称 |
Detection of transient phase shifts in any optical wave front with photorefractive crystal and polarized beams |
摘要 |
Detecting transient phase shifts in an object laser beam of predetermined frequency having an arbitrary wavefront and apparatus for directing said object laser beam to cross a second reference laser beam coherent with said object beam into an oriented photorefractive crystal ( 22 ) (Bi12TiO20) (applied alternating electric field) belonging to the crystal symmetry group of 43m or 23, setting the polarization state of said object beam ( 20, 26 ) and said reference beams ( 32, 34 ) to be elliptical and different one from other, causing said object laser beam to interfere with said reference beam inside the said photorefractive crystal so as to form a dielectric-permittivity-tensor grating diffracting said reference beam into said object beam and vice versa, and directing a beam transmitted through the said photorefractive crystal in the direction of a transmitted object beam onto a photo-detector ( 44 ) to result in an electrical output signal that is representative of the transient phase shift in the object laser beam. Optical fibers and splitted object beams may be used.
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申请公布号 |
US2005083535(A1) |
申请公布日期 |
2005.04.21 |
申请号 |
US20040496149 |
申请日期 |
2004.05.20 |
申请人 |
KAMSHILIN ALEXEI A.;GRACHEV ALEXANDER |
发明人 |
KAMSHILIN ALEXEI A.;GRACHEV ALEXANDER |
分类号 |
G01H9/00;G01N29/24;G01N29/50;(IPC1-7):G01B9/02 |
主分类号 |
G01H9/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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