发明名称 |
Planar optical waveguide device and DP-QPSK modulator |
摘要 |
A planar optical waveguide device, includes: two input portions that are waveguides that have the same width, are parallel to each other, and have rectangular cross-sections; a wide portion that is a linear waveguide and is connected after the two input portions; a tapered portion that is connected after the wide portion and that is a multi-mode waveguide which has a tapered shape having a width decreasing gradually and through which at least TE1 propagates; and an output portion that is connected after the tapered portion and that is a multi-mode waveguide which has a rectangular cross-section and through which at least TE1 propagates. The planar optical waveguide device forms a high-order mode conversion combining element that outputs the TE0, which is input to the two input portions, as the TE1 from the output portion. |
申请公布号 |
US9335472(B2) |
申请公布日期 |
2016.05.10 |
申请号 |
US201414509126 |
申请日期 |
2014.10.08 |
申请人 |
FUJIKURA LTD. |
发明人 |
Oka Akira;Ogawa Kensuke;Goi Kazuhiro;Kusaka Hiroyuki |
分类号 |
G02F1/035;G02B6/122;G02B6/125;G02B6/126;G02B6/14 |
主分类号 |
G02F1/035 |
代理机构 |
Sughrue Mion, PLLC |
代理人 |
Sughrue Mion, PLLC |
主权项 |
1. A planar optical waveguide device, comprising:
two input portions that are waveguides that have the same width, are parallel to each other, and have rectangular cross-sections; a wide portion that is a linear waveguide and is connected after the two input portions; a tapered portion that is connected after the wide portion and that is a multi-mode waveguide which has a tapered shape having a width decreasing gradually and through which at least TE1 propagates; and an output portion that is connected after the tapered portion and that is a multi-mode waveguide which has a rectangular cross-section and through which at least TE1 propagates, wherein the planar optical waveguide device forms a high-order mode conversion combining element that outputs the TE0, which is input to the two input portions, as the TE1 from the output portion, and assuming that a distance between the two input portions in a width direction of the two input portions is gap, a width of each of the two input portions is Wa, and a waveguide width of the wide portion is Wb, a relationship of Wb>Wa×2+gap is satisfied, and a center of the two input portions in the width direction matches a center of the wide portion in the width direction. |
地址 |
Tokyo JP |