JPH0667047A - Optical branching-multiplexing waveguide circuit - Google Patents
Optical branching-multiplexing waveguide circuitInfo
- Publication number
- JPH0667047A JPH0667047A JP4219356A JP21935692A JPH0667047A JP H0667047 A JPH0667047 A JP H0667047A JP 4219356 A JP4219356 A JP 4219356A JP 21935692 A JP21935692 A JP 21935692A JP H0667047 A JPH0667047 A JP H0667047A
- Authority
- JP
- Japan
- Prior art keywords
- waveguide
- multiplexing
- branching
- light
- combining
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B6/122—Basic optical elements, e.g. light-guiding paths
- G02B6/125—Bends, branchings or intersections
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
- G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
- G02B2006/12133—Functions
- G02B2006/1215—Splitter
Abstract
Description
【０００１】[0001]
【産業上の技術分野】この発明は、Ｙ字形導波路構造の
分岐・合波光導波回路に関し、特にＹ字形導波路の合波
導波路の構造を改良することによって、その合波導波路
中を伝搬する放射モ−ドの光の放射を促進するようにし
た分岐・合波光導波回路に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a branching / combining optical waveguide circuit having a Y-shaped waveguide structure, and more particularly, by propagating in the combining waveguide of the Y-shaped waveguide by improving the structure of the combining waveguide. The present invention relates to a branching / multiplexing optical waveguide circuit for promoting the emission of light in a radiation mode.
【０００２】[0002]
【従来の技術】従来の分岐・合波光導波回路は、図２に
示すように、二本の分岐導波路22,23の接続部（分岐・
合波部）24に直線状の合波導波路21を接続してなる略Ｙ
字形状の導波路構造を有している。この分岐・合波光導
波回路において、二本の分岐導波路22,23 中を各々矢印
Ａ，Ｂの向きに伝搬して来た伝搬光は、分岐・合波部24
で合流して共に直線状の合波導波路21中を伝搬すること
になる。2. Description of the Related Art A conventional branching / multiplexing optical waveguide circuit, as shown in FIG. 2, is a connecting portion of two branching waveguides 22 and 23.
A Y-shaped structure in which a linear combining waveguide 21 is connected to the combining section 24.
It has a V-shaped waveguide structure. In this branching / combining optical waveguide circuit, the propagating light propagating in the two branching waveguides 22 and 23 in the directions of arrows A and B, respectively,
Are merged with each other and both propagate in the linear multiplexing waveguide 21.
【０００３】[0003]
【発明が解決しようとする課題】しかし、従来の分岐・
合波光導波回路は、分岐・合波部24で励起された放射モ
−ドの光が合波導波路21で十分に放射されずそのまま伝
搬してしまい、その結果、合波導波路21端で放射モ−ド
の光と導波モ−ドの光の干渉により、光パワ−のピ−ク
位置が導波路中心よりずれるという問題がある。この光
パワ−ピ−ク位置のずれは、分岐比ばらつきの原因とな
る。[Problems to be Solved by the Invention]
In the multiplexing optical waveguide circuit, the light in the radiation mode excited by the branching / multiplexing unit 24 is not sufficiently radiated in the multiplexing waveguide 21 and propagates as it is, and as a result, it is radiated at the end of the multiplexing waveguide 21. There is a problem that the peak position of the optical power shifts from the center of the waveguide due to the interference between the light in the mode and the light in the waveguide mode. The shift of the optical power peak position causes the variation of the branching ratio.
【０００４】この発明の目的は、前記した従来技術の欠
点を解消し、合波導波路端での光パワ−ピ−ク位置のず
れ及び分岐比ばらつきを起こす原因となる合波導波路中
を伝搬する放射モ−ドの光を十分に放射させることので
きる分岐・合波光導波回路を提供することにある。The object of the present invention is to solve the above-mentioned drawbacks of the prior art, and to propagate in the multiplexing waveguide which causes the shift of the optical power peak position at the end of the multiplexing waveguide and the variation of the branching ratio. An object of the present invention is to provide a branching / multiplexing optical waveguide circuit capable of sufficiently emitting the light in the radiation mode.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
にこの発明は、二本の分岐導波路と一本の合波導波路と
をＹ字形に接続してなる分岐・合波光導波回路におい
て、上記合波導波路に、所定の曲率半径を有する曲線状
の導波路部を形成したものである。In order to achieve the above object, the present invention provides a branching / multiplexing optical waveguide circuit in which two branching waveguides and one multiplexing waveguide are connected in a Y shape. A curved waveguide portion having a predetermined radius of curvature is formed in the above-mentioned multiplexing waveguide.
【０００６】[0006]
【作用】合波導波路に、放射モ−ドの光に対してはその
放射を促進し、導波モ−ドの光に対してはその伝搬を許
容する所定の曲率半径を有する曲線状の導波路部を形成
しておくことにより、合波導波路端の光パワ−ピ−ク位
置のずれ及び分岐比ばらつきの原因となる放射モ−ドの
光を十分に放射させ、導波モ−ドの光のみを伝搬させる
ことができる。A curved waveguide having a predetermined radius of curvature that promotes the radiation of the light in the radiation mode and allows the propagation of the light in the waveguide mode is provided to the multiplexing waveguide. By forming the waveguide part, the light in the radiation mode that causes the deviation of the optical power peak position at the end of the multiplexing waveguide and the variation of the branching ratio is sufficiently radiated, and the waveguide mode Only light can be propagated.
【０００７】[0007]
【実施例】以下に、この発明の実施例を説明する。Embodiments of the present invention will be described below.
【０００８】図１には、この発明の分岐・合波光導波回
路の導波路構造が示されている。この導波路は、石英基
板上にフォトリソグラフィやドライエッチング等の微細
加工技術を用いて形成されたものであり、二本の分岐導
波路12,13 、分岐・合波部14、および一本の合波導波路
11より構成されている。分岐導波路12,13 はいずれも直
線状に形成され、合波導波路11は曲線状に形成されてい
る。合波導波路11の曲線状の導波路部11a の曲率半径
は、放射モ−ドの光に対してはその放射を促進し、導波
モ−ドの光に対してはその伝搬を許容するように設定さ
れている。FIG. 1 shows a waveguide structure of a branching / multiplexing optical waveguide circuit of the present invention. This waveguide is formed on a quartz substrate by using a microfabrication technique such as photolithography or dry etching, and has two branch waveguides 12 and 13, a branching / multiplexing unit 14, and a single branching waveguide. Waveguide
It is composed of 11. Each of the branching waveguides 12 and 13 is formed in a linear shape, and the combining waveguide 11 is formed in a curved shape. The radius of curvature of the curved waveguide portion 11a of the multiplexing waveguide 11 is set so as to promote the radiation of the light in the radiation mode and allow the propagation of the light in the waveguide mode. Is set to.
【０００９】それぞれの分岐導波路12,13 より入射した
光は分岐・合波部14で導波モ−ドと放射モ−ドに励起さ
れて合波導波路11に入射する。合波導波路11に入射した
光はその放射モ−ドが曲線状の導波路部11a において放
射され、導波モ−ドのみが伝搬する。その結果、合波導
波路11端での光パワ−ピ−ク位置のずれ及び分岐比ばら
つきが低減される。The lights incident from the respective branch waveguides 12 and 13 are excited by the branching / combining section 14 into the waveguide mode and the radiation mode, and enter the combining waveguide 11. The radiation mode of the light incident on the multiplexing waveguide 11 is radiated in the curved waveguide portion 11a, and only the waveguide mode propagates. As a result, the shift of the optical power peak position at the end of the multiplexing waveguide 11 and the variation of the branching ratio are reduced.
【００１０】[0010]
【発明の効果】以上要するにこの発明の分岐・合波光導
波回路によれば、その合波導波路に所定の曲率半径を有
する曲線状の導波路部を形成したことにより、合波導波
路中を伝搬する放射モ−ドの光を十分に放射させ、合波
導波路端での光パワ−ピ−ク位置のずれ及び分岐比ばら
つきを低減できる。In summary, according to the branching / multiplexing optical waveguide circuit of the present invention, a curved waveguide portion having a predetermined radius of curvature is formed in the multiplexing waveguide so that it propagates in the multiplexing waveguide. It is possible to sufficiently radiate the light in the radiation mode that is used, and to reduce the deviation of the optical power peak position and the variation of the branching ratio at the end of the multiplexing waveguide.
【図１】この発明の分岐・合波光導波回路の導波路構造
の一実施例を示す概略平面図である。FIG. 1 is a schematic plan view showing an embodiment of a waveguide structure of a branching / multiplexing optical waveguide circuit of the present invention.
【図２】従来の分岐・合波光導波回路の導波路構造を示
す概略平面図である。FIG. 2 is a schematic plan view showing a waveguide structure of a conventional branching / multiplexing optical waveguide circuit.
11 合波導波路 11a 曲線状の導波路部 12 分岐導波路 13 分岐導波路 14 分岐・合波部 11 Multiplexing waveguide 11a Curved waveguide section 12 Branching waveguide 13 Branching waveguide 14 Branching / multiplexing section
Claims (1)
をＹ字形に接続してなる分岐・合波光導波回路におい
て、上記合波導波路に、所定の曲率半径を有する曲線状
の導波路部を形成したことを特徴とする分岐・合波光導
波回路。1. A branching / combining optical waveguide circuit comprising a Y-shaped connection of two branching waveguides and one combining waveguide, wherein the combining waveguide has a curved shape having a predetermined radius of curvature. A branching / multiplexing optical waveguide circuit characterized in that a waveguide section of is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4219356A JPH0667047A (en) | 1992-08-18 | 1992-08-18 | Optical branching-multiplexing waveguide circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4219356A JPH0667047A (en) | 1992-08-18 | 1992-08-18 | Optical branching-multiplexing waveguide circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0667047A true JPH0667047A (en) | 1994-03-11 |
Family
ID=16734155
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4219356A Pending JPH0667047A (en) | 1992-08-18 | 1992-08-18 | Optical branching-multiplexing waveguide circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0667047A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6823118B2 (en) | 2002-04-24 | 2004-11-23 | Tdk Corporation | Optical branching circuit and device |
| EP2395388A1 (en) * | 2010-06-10 | 2011-12-14 | Fujitsu Optical Components Limited | Branch optical waveguide |
| JP2012068531A (en) * | 2010-09-24 | 2012-04-05 | Nippon Telegr & Teleph Corp <Ntt> | Optical circuit |
| US8358885B2 (en) | 2008-12-24 | 2013-01-22 | Fujitsu Limited | Optical semiconductor device, manufacturing method thereof and optical transmission device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142504A (en) * | 1983-02-03 | 1984-08-15 | Fujitsu Ltd | Optical guide type isolator |
| JPS60122903U (en) * | 1984-01-27 | 1985-08-19 | 株式会社島津製作所 | optical splitter |
| JPH01144003A (en) * | 1987-12-01 | 1989-06-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexer/demultiplexer array |
| JPH04213407A (en) * | 1990-12-10 | 1992-08-04 | Nippon Telegr & Teleph Corp <Ntt> | Branching/multiplexing optical waveguide circuit |
| JPH04289803A (en) * | 1991-03-18 | 1992-10-14 | Nippon Sheet Glass Co Ltd | Multiple branch optical circuit |
-
1992
- 1992-08-18 JP JP4219356A patent/JPH0667047A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59142504A (en) * | 1983-02-03 | 1984-08-15 | Fujitsu Ltd | Optical guide type isolator |
| JPS60122903U (en) * | 1984-01-27 | 1985-08-19 | 株式会社島津製作所 | optical splitter |
| JPH01144003A (en) * | 1987-12-01 | 1989-06-06 | Nippon Telegr & Teleph Corp <Ntt> | Optical multiplexer/demultiplexer array |
| JPH04213407A (en) * | 1990-12-10 | 1992-08-04 | Nippon Telegr & Teleph Corp <Ntt> | Branching/multiplexing optical waveguide circuit |
| JPH04289803A (en) * | 1991-03-18 | 1992-10-14 | Nippon Sheet Glass Co Ltd | Multiple branch optical circuit |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6823118B2 (en) | 2002-04-24 | 2004-11-23 | Tdk Corporation | Optical branching circuit and device |
| US8358885B2 (en) | 2008-12-24 | 2013-01-22 | Fujitsu Limited | Optical semiconductor device, manufacturing method thereof and optical transmission device |
| EP2395388A1 (en) * | 2010-06-10 | 2011-12-14 | Fujitsu Optical Components Limited | Branch optical waveguide |
| JP2011257634A (en) * | 2010-06-10 | 2011-12-22 | Fujitsu Optical Components Ltd | Optical waveguide, optical modulator and optical coupler |
| US8824836B2 (en) | 2010-06-10 | 2014-09-02 | Fujitsu Optical Components Limited | Optical waveguide, optical modulator and optical coupler |
| JP2012068531A (en) * | 2010-09-24 | 2012-04-05 | Nippon Telegr & Teleph Corp <Ntt> | Optical circuit |
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