G - Physics – 02 – B
Patent
G - Physics
02
B
G02B 27/28 (2006.01) G02B 5/30 (2006.01) G02B 6/26 (2006.01) H04B 10/17 (2006.01)
Patent
CA 2185608
An optical device comprises a first doubly refracting crystal plate of parallel plate type whose crystal optical axis is inclined in relation to the optical axis of incident light, a second doubly refracting crystal plate of parallel plate type which is equal to the first doubly refracting crystal plate of parallel plate type in inclination of the crystal optical axis and in plate thickness, and a Faraday rotator which is disposed between the first and the second doubly refracting crystal plates and which rotates by 90 degrees an incident linear polarized light which is in the optical axis direction of the incident light and has wavelength of the incident light. The invention can provide a polarization-independent optical isolator which is small-sized and in which the direction of the input/output optical fiber may be set at will. The invention can also provide an optical circulator in which the number of input/output ports may be set at will.
Corporation Nec
G. Ronald Bell & Associates
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