Polarization independent optical isolator

Details Polarization independent optical isolator Polarization independent optical isolator

1996-09-09

1998-06-30

Dzierzynski, Paul M.

Optical: systems and elements

Polarization without modulation

By relatively adjustable superimposed or in series polarizers

359282, 359484, 359494, 359499, G02B 530, G02B 2728

Patent

active

057742642

ABSTRACT:
A polarization-independent optical isolator having a structure in which polarization dispersion is virtually eliminated by selecting the thickness and optical axis orientations of birefringent crystalline plates used in the isolator. The optical isolator of the present invention employs a combination of birefringent crystalline plates wherein the optical axis orientation of at least one birefringent crystalline plate in the optical isolator is different from the optical axis orientation of the remaining birefringent crystalline plates, and the polarization mode dispersion, which is induced when the beam propagates through the birefringent crystalline plate having a different optical axis orientation, is equal to the dispersion rate of the polarization mode dispersion attributable to the remaining birefringent crystalline plates and in a mutually inverse direction.

REFERENCES:
patent: 5345329 (1994-09-01), Shirai et al.
patent: 5381261 (1995-01-01), Hirai et al.
Chang et al, Polarization Independent Isolator Using Spatial Walkoff Polarizers, IEEE Photonics Technology Letters, vol. 1, No. 3, Mar. 1989, pp. 68 to 70.

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