Optical isolator, circulator, switch or the like, including a fa

Details Optical isolator, circulator, switch or the like, including a fa Optical isolator, circulator, switch or the like, including a fa

1995-02-15

1997-03-18

Shafer, Ricky D.

Optical: systems and elements

Optical modulator

Light wave temporal modulation

359282, 359484, 359501, 372703, 385 6, 385 11, G02F 109, G02B 530

Patent

active

056128134

ABSTRACT:
Optical isolator, circulator, switch or the like, including a Faraday rotator to which a magnetic field is applied which is oriented along the direction of propagation of light and which is arranged between a preceding polarization filter and a succeeding polarization filter whose planes of polarization enclose an angle with respect to each other such that light can only traverse in one direction, the Faraday rotator having different propagation constants .beta..sub.TE and .beta..sub.TM in a TE plane and a TM plane, respectively. The elaborate technique for adapting the propagation constants of the TE wave and the TM wave is mitigated in that the TE plane of the Faraday rotator is aligned in such a way that it extends between the planes of polarization of the polarization filters.

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Kampel, "A YIG Radiometer and Temperature Controller"; Wireless World; Oct. 1970; pp 501-504.

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