发明名称 |
Optical waveguide and arrayed waveguide grating |
摘要 |
A technique that does not increase the circuit size, does not make the circuit design and manufacturing difficult, and can reduce insertion loss when light enters from a slab waveguide toward an arrayed waveguide or when the light enters from the arrayed waveguide toward the slab waveguide. An optical waveguide provided with a slab waveguide in which a grating is formed therein at a distance from an end, and an arrayed waveguide whose end is connected to an end of the slab waveguide at a position where a constructive interference portion of a self-image of the grating is formed. An arrayed waveguide grating provided with a first input/output waveguide, the above-mentioned optical waveguide where an end of the slab waveguide on the opposite side of the arrayed waveguide is connected to an end of the first input/output waveguide, a second slab waveguide connected to an end of the arrayed waveguide on the opposite side of the slab waveguide, and a second input/output waveguide connected to an end of the second slab waveguide on the opposite side of the arrayed waveguide. |
申请公布号 |
US9618694(B2) |
申请公布日期 |
2017.04.11 |
申请号 |
US201113698573 |
申请日期 |
2011.05.10 |
申请人 |
NTT ELECTRONICS CORPORATION |
发明人 |
Morita Keiichi;Shimizu Kazumi;Kawashima Kouji;Niitsu Tomoharu |
分类号 |
G02B6/34;G02B6/12;G02B6/28 |
主分类号 |
G02B6/34 |
代理机构 |
Ohlandt, Greeley, Ruggiero & Perle, L.L.P. |
代理人 |
Ohlandt, Greeley, Ruggiero & Perle, L.L.P. |
主权项 |
1. An arrayed waveguide grating comprising:
two or more first input/output waveguides; a first slab waveguide connected to an end of the first input/output waveguides; an arrayed waveguide connected to an end of the first slab waveguide on an opposite side of the first input/output waveguides; a second slab waveguide connected to a first end of the arrayed waveguide on an opposite side of the first slab waveguide; one or more second input/output waveguide(s) connected to an end of the second slab waveguide on an opposite side of the arrayed waveguide; and a grating formed in the first slab waveguide at a distance from the end of the first slab waveguide, and wherein a second end of the arrayed waveguide is connected to a position deviated from a position where a constructive interference portion of a self-image of the grating is formed so that a light intensity distribution from the first input/output waveguides is substantially uniform when light enters from the one or more second input/output waveguide(s) toward the first input/output waveguides. |
地址 |
Kanagawa JP |