Polarization transformer

Details Polarization transformer Polarization transformer

1980-12-15

1983-05-24

Lee, John D.

350384, 350389, G02B 5176

Patent

active

043847609

ABSTRACT:
A generalized polarization transformer (10) is disclosed that is capable, under electrical control, of transforming the polarization of a signal between two arbitrary states. In its most general form, the transformer comprises a variable input phase shifter (11) for varying the relative phase between an incident pair of orthogonally polarized wave components; a variable mode converter (12) for varying the relative amplitudes of said orthogonally polarized wave components; and a variable output phase shifter (13) for varying the relative phase between the wave components derived from said mode converters. For some applications, the output phase shifter is not required. In an alternative configuration, the input phase shifter and the mode converter are combined in a common constructure.

REFERENCES:
patent: 3874782 (1975-04-01), Schmidt
patent: 3877782 (1975-04-01), Kaminow
patent: 4157860 (1979-06-01), Marcatili
patent: 4179189 (1979-12-01), Kaminow et al.
patent: 4262993 (1981-04-01), Burns et al.
patent: 4273411 (1981-06-01), Alferness
patent: 4291939 (1981-09-01), Giallorenzi et al.
patent: 4310813 (1982-01-01), Yuuki et al.
Okamura et al., "Electro-Optic Guided-to-Radiation Mode Conversion . . . ", A. P. L., vol. 32, No. 3, Feb. 1978, pp. 161-163.
Kondo et al., "Wavelength Selective Optical Fiber Switches Based On . . . ", Proc. of Opt. Commun. Conf., Amsterdam, Sep. 1979, pp. 16.7-1 to 5.
Alferness et al., "Electro-Optic Waveguide TE.revreaction.TM Mode Converter . . . ", Optics Lett., vol. 5, No. 11, Nov. 1980, pp. 473-475.

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