Optical attenuator

Details Optical attenuator Optical attenuator

1998-11-02

2000-01-25

Epps, Georgia

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359280, 359281, 359284, 359484, B02F 109

Patent

active

060184124

ABSTRACT:
A specific polarized light component out of a light wave passed through a magneto-optic crystal (for example YIG) is extracted by a polarizer. The intensity of the light beam output from the polarizer depends on strength and direction of magnetic fields applied to the magneto-optic crystal. The magneto-optic crystal is applied with a first and a second magnetic field acting in directions different from each other and the strength of the composite magnetic field of them is set to exceed a predetermined value at all times. By varying at least one of the first and second magnetic fields, the attenuation factor in the magneto-optic crystal can be changed continuously and with good reproducibility.

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