Bending Waveguide
AssigneeNippon Telegraph and Telephone Corporation
InventorsYuichiro Ikuma, Yusuke Nasu
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Abstract
An optical waveguide of the present disclosure proposes a configuration of a bent waveguide having a novel configuration. For proposed four types of curves A, B, C, and D, a value obtained by differentiating a curvature along a waveguide is 0 at one end 1=0 and the other end 1=L of a bent waveguide. It is possible to suppress optical loss and inter-mode crosstalk occurring in the bent waveguide. Even in a bent waveguide having a waveguide width under a multimode condition, excellent inter-mode crosstalk characteristics and low loss are achieved as compared with the clothoid curve of the prior art.
Claims8
A bent waveguide, wherein
- a curvature radius r gradually varies from a first value (R1) at a first end to a second value (R2) at a second end,
- a curvature is represented by the reciprocal 1/r of the curvature radius, and
- a differential coefficient obtained by differentiating the curvature with a length 1 along the waveguide is 0 at the first end and the second end.
Dependencies are inferred from the claim text.