Optical: systems and elements – Diffraction – Using fourier transform spatial filtering
Patent
1990-03-26
1991-09-03
Arnold, Bruce Y.
Optical: systems and elements
Diffraction
Using fourier transform spatial filtering
364822, 372 40, 359333, G02F 300, H01S 330
Patent
active
050447262
ABSTRACT:
A device for the correlation between optical beams having spatially modulated intensities has an active glass window, which on one side is illuminated at the same time by a reading and a pumping beam through one or a plurality of semitransparent mirrors. The reading beam has radiations with a wavelength equal to that of a transition between an intermediate and fundamental energy level. The pump beam has radiations with a wavelength corresponding to the energy of the highest power level of the material forming the active glass, obtaining on the other side of the window a light beam representing the correlation betwen the pumping and reading beams.
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Arnold Bruce Y.
Cselt Centro Studi E Laboratori Telecommunicazioni S.P.A.
Dubno Herbert
Lerner Martin
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