Patent ID: 8971677
Filing Date: 2015-03-03
Classification: G02B,H04B

Abstract:
1. An optical 90-degree hybrid circuit comprising: first optical splitting means for receiving and splitting a first light beam into two; second optical splitting means for receiving and splitting a second light beam into two; first optical coupling means for generating an interfering light beam by multiplexing one of the light beams split by the first optical splitting means and one of the light beams split by the second optical splitting means; second optical coupling means for generating an interfering light beam by multiplexing the other one of the light beams split by the second optical splitting means and the other one of the light beams split by the first optical splitting means; a first arm waveguide connecting the first optical splitting means and the first optical coupling means; a second arm waveguide connecting the first optical splitting means and the second optical coupling means; a third arm waveguide connecting the second optical splitting means and the first optical coupling means; and a fourth arm waveguide connecting the second optical splitting means and the second optical coupling means, wherein: