Patent ID: 6091543
Filing Date: 2000-07-18
Classification: G02B,G02F

Abstract:
An optical apparatus comprisinga first walk-off device having at least a first optical port at a first end thereof and at least a second and third optical port at a second end thereof,a first Faraday rotator coupled in an optical path with said second optical port of said first walk off device; anda second Faraday rotator coupled in an optical path with said third optical port of said first walk off device, each of said first and second Faraday rotator substantially providing a polarization rotation opposite to each other which is an odd multiple of 45 degrees, further including a second walk off device disposed between said first walk off device and said first and second Faraday rotator, said second walk off device including first and second optical ports at a first end thereof aligning with said second and third optical ports of said first walk off device and third and fourth optical ports at a second end thereof aligning with said first and second Faraday rotator respectively.