JPH01156703A - Optical coupler - Google Patents
Optical couplerInfo
- Publication number
- JPH01156703A JPH01156703A JP31585487A JP31585487A JPH01156703A JP H01156703 A JPH01156703 A JP H01156703A JP 31585487 A JP31585487 A JP 31585487A JP 31585487 A JP31585487 A JP 31585487A JP H01156703 A JPH01156703 A JP H01156703A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- face
- waveguide
- optical fiber
- output side
- 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
- 230000003287 optical effect Effects 0.000 title claims abstract description 89
- 239000013307 optical fiber Substances 0.000 claims abstract description 73
- 239000000758 substrate Substances 0.000 abstract description 13
- 239000000853 adhesive Substances 0.000 abstract description 9
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract description 3
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052719 titanium Inorganic materials 0.000 abstract description 3
- 239000010936 titanium Substances 0.000 abstract description 3
- 230000001070 adhesive effect Effects 0.000 description 8
- 238000005253 cladding Methods 0.000 description 5
- 230000004927 fusion Effects 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000010453 quartz Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
- G02B6/2808—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers using a mixing element which evenly distributes an input signal over a number of outputs
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/2804—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals forming multipart couplers without wavelength selective elements, e.g. "T" couplers, star couplers
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/30—Optical coupling means for use between fibre and thin-film device
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Integrated Circuits (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
〔概要〕
複数の光ファイバを、光結合する光カプラに関し、
出力側光ファイバが３本以上のものに適用して、小形で
、且つ低コストの光カプラを提供することを目的とし、
深さが光結合する光ファイバのコアの直径にほぼ等しく
、所望数の出力側光ファイバを並列した並列長にほぼ等
しい幅で、所望長の矩形板状の光導波路と、出射端面が
該先導波路の一方の端面に密着した、一本の入力側光フ
ァイバと、それぞれの入射端面が該先導波路の他方の端
面に密着して並列した、複数の出力側光ファイバと、よ
りなる構成とする。[Detailed Description of the Invention] [Summary] Regarding an optical coupler that optically couples a plurality of optical fibers, the present invention provides a small and low-cost optical coupler that can be applied to an optical coupler having three or more output side optical fibers. A rectangular plate-shaped optical waveguide with a depth approximately equal to the diameter of the core of the optical fiber to be optically coupled, and a width approximately equal to the parallel length of a desired number of output optical fibers in parallel, and a desired length; one input-side optical fiber whose output end face is in close contact with one end face of the guiding wavepath; a plurality of output-side optical fibers arranged in parallel, each of which has an input end face in close contact with the other end face of the guiding waveguide; The structure consists of:
本発明は、複数の光ファイバを光結合する光カブラに関
する。The present invention relates to an optical coupler that optically couples a plurality of optical fibers.
近年の光伝送路は、通信帯域を広帯域とする４めに、コ
ア径の小さいシングルモード光ファイバを使用する傾向
にある。In recent years, there has been a trend in optical transmission lines to use single-mode optical fibers with a small core diameter in order to provide a wide communication band.
一方、光通信の普及に伴い、光伝送路中で光信号を分岐
する小形・低コストの光カプラが要望されている。On the other hand, with the spread of optical communications, there is a demand for small, low-cost optical couplers that branch optical signals in optical transmission lines.
第４図は従来の光カプラの斜視図であって、（ａｌは光
フアイバ融着型光カプラを、（ｂｌは導波路型光カプラ
を示す。FIG. 4 is a perspective view of a conventional optical coupler, in which (al indicates an optical fiber fusion type optical coupler and (bl indicates a waveguide type optical coupler).
第４図（ａｌにおいて、入力側光ファイバ１−１と第１
の出力側光ファイバ２−１とは、もともとが１本のシン
グルモード光ファイバであって、石英ガラス等よりなる
直径が１０μｍ程度のコアの周囲に、コアの屈折率より
も小さい屈折率の石英ガラス等よりなるクラッドを有し
、クラッドの外径は１２５μｍ程度である。In Figure 4 (al), the input side optical fiber 1-1 and the
The output side optical fiber 2-1 is originally a single mode optical fiber, and is surrounded by a core made of quartz glass or the like with a diameter of about 10 μm.A quartz fiber having a refractive index smaller than that of the core It has a cladding made of glass or the like, and the outer diameter of the cladding is about 125 μm.
また、他方の入力側光ファイバ１−２と第２の出力側光
ファイバ２−２とは、もともとが１本の他のシングルモ
ード光ファイバである。Further, the other input side optical fiber 1-2 and the second output side optical fiber 2-2 are originally one other single mode optical fiber.
このような２本のシングルモード光ファイバを平行に整
列させ、中間部分を加熱して、所望長だけ、クラッドを
一本化しである。そして、さらにこの一本化部分を延伸
して、コア及びクラッドを細径にして、それぞれの２本
のコアを平行に近接させて、光結合部３としである。Two such single-mode optical fibers are aligned in parallel, the intermediate portion is heated, and the cladding is unified by a desired length. Then, this unified portion is further extended to make the core and cladding smaller in diameter, and each two cores are brought close to each other in parallel to form the optical coupling portion 3.
列し、他方の側に第１の出力側光ファイバ２−１と第２
の出力側光ファイバ２−２とを並列して、光フアイバ融
着型光カプラとしている。the first output side optical fiber 2-1 and the second output side optical fiber 2-1 on the other side.
The output side optical fiber 2-2 is arranged in parallel to form an optical fiber fusion type optical coupler.
したがって、入力側光ファイバ１−１より光信号を伝送
すると、光結合部３部分で分岐して、出力側光フアイバ
２−１ と出力側光ファイバ２−２とに分配されて進行
する。Therefore, when an optical signal is transmitted from the input optical fiber 1-1, it is branched at the optical coupling section 3 and distributed to the output optical fiber 2-1 and the output optical fiber 2-2.
このような光カプラは、構成が簡単で小形であるという
利点がある。Such an optical coupler has the advantage of being simple and compact.
第４図（ｂｌにおいて、４は、例えばニオブ酸リチウム
等の導波路基板であって、表面には細幅の光導波路５と
、光導波路５を導波路基Ｆｉ４のほぼ中央部で二股に分
岐して構成した先導波路６−１．６−２とを設けである
。これらの光導波路は、チタン等を拡散させて光屈折率
を大きくしたもので、その、断面はほぼ角形である。FIG. 4 (in BL, 4 is a waveguide substrate made of, for example, lithium niobate, etc., which has a narrow optical waveguide 5 on its surface and branches the optical waveguide 5 into two at approximately the center of the waveguide base Fi4. These optical waveguides are made of diffused titanium or the like to increase the optical refractive index, and have a substantially rectangular cross section.
光導波路５．光導波路６−１．６−２の深さは、シング
ルモード光ファイバのコアの直径にほぼ等しく、ｌＯμ
ｍ程度であり、その幅もコアの直径にほぼ等しい。Optical waveguide5. The depth of the optical waveguide 6-1, 6-2 is approximately equal to the core diameter of the single mode optical fiber, and is lOμ
The width is approximately equal to the diameter of the core.
光導波路５の一端は、導波路基板４の長手方向の一方の
端面に開口し、先導波路６−１．６−２は、導波路基板
４の長手方向の他方の端面に開口している。One end of the optical waveguide 5 is open to one end surface of the waveguide substrate 4 in the longitudinal direction, and the leading waveguide 6-1, 6-2 is opened to the other end surface of the waveguide substrate 4 in the longitudinal direction.
シングルモード光ファイバである入力側光ファイバ１の
出射端面を、光導波路５の開口端面に当接し、光学接着
剤を用いて密着させである。The output end face of the input side optical fiber 1, which is a single mode optical fiber, is brought into contact with the open end face of the optical waveguide 5, and is tightly attached using an optical adhesive.
また、シングルモード光ファイバである出力側光ファイ
バ２−１の入射端面を光導波路６−１の開口端面に、出
力側光ファイバ２−２の入射端面を先導波路６−２の開
口端面に、それぞれ当接し、光学接着剤を用いて密着さ
せである。Further, the input end face of the output optical fiber 2-1, which is a single mode optical fiber, is the open end face of the optical waveguide 6-1, and the input end face of the output optical fiber 2-2 is the open end face of the leading waveguide 6-2. They are brought into contact with each other and adhered using an optical adhesive.
したがって、入力側光ファイバ１より光信号を伝送する
と、先導波路５を進行して、光導波路６−１と光導波路
６−２とに分岐する。そして、対向するそれぞれの出力
側光ファイバ２−１ 、２−２に光結合して、伝送され
る。Therefore, when an optical signal is transmitted from the input optical fiber 1, it travels through the leading waveguide 5 and branches into an optical waveguide 6-1 and an optical waveguide 6-2. The signals are then optically coupled to the opposing output side optical fibers 2-1 and 2-2 and transmitted.
上述のような、導波路型光カプラは、小形で、且つ第４
図（ａ）のものに比較して、製造が容易で低コストであ
るという利点がある。The waveguide type optical coupler as described above is small and has a fourth
It has the advantage of being easier to manufacture and lower cost than the one shown in Figure (a).
しかしながら上記従来例の前者、即ち光フアイバ融着型
光カプラは、製造が困難で、出力側光ファイバに等分の
強さで、光信号を分岐することが困難であるという問題
点があった。However, the former of the above conventional examples, that is, the optical fiber fusion type optical coupler, has problems in that it is difficult to manufacture and it is difficult to branch the optical signal with equal strength to the output side optical fiber. .
また、光フアイバ融着型光カプラ、渾波路型光カプラの
両者とも、出力側光ファイバを３本以上にする場合には
、第４図に図示した２分枝光カプラを、多段に連結する
ことになり、大形で、且つコスト高になるという問題点
があった。In addition, in both the optical fiber fusion type optical coupler and the cross-wave path type optical coupler, if the number of output side optical fibers is three or more, the two-branch optical coupler shown in Fig. 4 should be connected in multiple stages. However, there were problems in that it was large in size and high in cost.
本発明はこのような点に鑑みて創作されたもので、出力
側光ファイバが３本以上のものに適用して、小形で、且
つ低コストの光カプラを提供することを目的としている
。The present invention was created in view of these points, and an object of the present invention is to provide a small and low-cost optical coupler that can be applied to an optical coupler having three or more output side optical fibers.
ｃ問題点を解決するための手段〕
上記の問題点を解決するために本発明は、第１図のよう
に、深さが光結合する光ファイバのコアの直径にほぼ等
しく、幅が所望数の出力側光ファイバを並列した並列長
にほぼ等しい、所望の長さの矩形板状の光導波路１５を
、導波路基板１４の表面に設ける。Means for Solving Problem c] In order to solve the above problem, the present invention provides a method in which the depth is approximately equal to the diameter of the core of the optical fiber to be optically coupled, and the width is a desired number of A rectangular plate-shaped optical waveguide 15 having a desired length, which is approximately equal to the parallel length of the output side optical fibers arranged in parallel, is provided on the surface of the waveguide substrate 14.
入力側光ファイバ１０の出射端面が、光導波路１５の一
方の端面のほぼ中央部で密接するように、入力側光ファ
イバ１０を導波路基板１４に接着する。The input optical fiber 10 is bonded to the waveguide substrate 14 so that the output end face of the input optical fiber 10 is in close contact with the optical waveguide 15 at approximately the center of one end face.
また、それぞれの入射端面が先導波路１５の他方の端面
に密接し、並行に並列するように、複数の出力側光ファ
イバ２０−１ 、２０−２．番−２０−Ｎを、導波路基
板１４に接着する構成とする。Further, a plurality of output side optical fibers 20-1, 20-2. No. -20-N is bonded to the waveguide substrate 14.
上記本発明によれば、入力側光ファイバ１０の出射端面
は、光導波路１５の入射端面のほぼ中央部で、光導波路
１５に光結合している。したがって、光導波路１５の入
射端面の光パワーは、第２図（ａ）に示すように、光導
波路１５の幅Ｂの中心部に集中している。According to the present invention, the output end face of the input side optical fiber 10 is optically coupled to the optical waveguide 15 at approximately the center of the input end face of the optical waveguide 15 . Therefore, the optical power at the input end face of the optical waveguide 15 is concentrated at the center of the width B of the optical waveguide 15, as shown in FIG. 2(a).
しかし、光導波路１５の長さが、拡開するに必要な長さ
であるので、光導波路１５を進行中に横モードが発生し
てマルチモード化し光４波路１５の幅の全面に拡開する
。そして、先導波路１５以外の外部部へは発散しない。However, since the length of the optical waveguide 15 is the length necessary for expansion, a transverse mode occurs while the optical waveguide 15 is traveling, becomes a multimode, and expands over the entire width of the four optical waveguides 15. . Then, it does not diverge to the outside except for the leading waveguide 15.
即ち、光導波路１５の出射端面においては、第２図山）
に示すように、光導波路１５の幅Ｂの全面にわたってと
びとびに、光パワーが分布している。That is, at the output end face of the optical waveguide 15,
As shown in the figure, the optical power is distributed at intervals over the entire width B of the optical waveguide 15.
よって、光導波路１５の出射端面に密着して並列した、
それぞれの出力側光ファイバ２０−１．２０−２．−・
−２０−Ｎに、はぼ等分された強さの光信号が分配され
、伝送する。Therefore, in close contact with and parallel to the output end face of the optical waveguide 15,
Each output side optical fiber 20-1.20-2. −・
-20-N, optical signals with approximately equally divided intensities are distributed and transmitted.
以下図を参照しながら、本発明を具体的に説明する。な
お、全図を通じて同一符号は同一対象物を示す。The present invention will be specifically described below with reference to the drawings. Note that the same reference numerals indicate the same objects throughout the figures.
第３図は本発明の実施例の斜視図であって、シングルモ
ード光ファイバ（コア径・・・１０μｍ、クラッド外径
−４２５μｍ）である入力側光ファイバ１０に伝送した
光信号を、例えば５本のシングルモード光ファイバであ
る出力側光ファイバ２０−１．２０−２゜−２０−５に
、分配する光カプラを示す。FIG. 3 is a perspective view of an embodiment of the present invention, in which an optical signal transmitted to the input side optical fiber 10, which is a single mode optical fiber (core diameter: 10 μm, cladding outer diameter: −425 μm), is An optical coupler is shown for distribution to the output side optical fiber 20-1.20-2°-20-5, which is a single mode optical fiber.
例えばニオブ酸リチウム等の導波路基板１４の表面には
、チタン等を拡散させて、光屈折率を大にし、先導波路
１５を設けである。For example, on the surface of the waveguide substrate 14 made of lithium niobate or the like, titanium or the like is diffused to increase the optical refractive index, and a leading waveguide 15 is provided.
光導波路１５の深さは、入力側光ファイバ１０のコアの
直径にほぼ等しく、１０μｍ程度であり、その幅は、出
力側光ファイバを並列に５本配設した幅（１２５Ｘ ５
）μｍよりも所望に太き（で、出力側光ファイバの配列
ピッチにより異なるが、６５０μｍ〜８００μｍ程度で
ある。The depth of the optical waveguide 15 is approximately equal to the diameter of the core of the input optical fiber 10, which is about 10 μm, and its width is the width of five output optical fibers arranged in parallel (125×5
) .mu.m (and is approximately 650 .mu.m to 800 .mu.m, depending on the arrangement pitch of the output optical fibers).
また、光導波路１５の長さは、光信号が拡開するに必要
な所望の長さでである。Further, the length of the optical waveguide 15 is a desired length necessary for spreading the optical signal.
導波路基板１４は、例えばシリコン等よりなる基台３０
の浅いＵ形溝３１のほぼ中央部に嵌挿され、導波路基板
１４の底面を、溝３１の底面に接着剤等により接着され
ている。The waveguide substrate 14 includes a base 30 made of silicon or the like, for example.
The waveguide substrate 14 is fitted into approximately the center of the shallow U-shaped groove 31, and the bottom surface of the waveguide substrate 14 is bonded to the bottom surface of the groove 31 with an adhesive or the like.
３５、４０は、ともにシリコン等よりなり、基台３０の
溝３１の幅よりも僅かに小さい幅の角板形で、光ファイ
バを保持する保持板である。Reference numerals 35 and 40 are both made of silicon or the like, and are square plate-shaped with a width slightly smaller than the width of the groove 31 of the base 30, and are holding plates that hold the optical fiber.
入力側保持板３５の表面に、入力側光ファイバ１０を載
置する一条のＶ溝を設け、出力側保持板４０には、並列
すべき出力側光フアイバ本数に等しい数（図示例は５条
の■溝）の■溝を並列に設けである。A V-groove is provided on the surface of the input-side holding plate 35 for placing the input-side optical fiber 10, and the output-side holding plate 40 is provided with a V-groove with a number equal to the number of output-side optical fibers to be paralleled (5 in the illustrated example). (■groove) and (■groove) are provided in parallel.
なお、入力側保持板３５．出力側保持板４０の板厚は、
■溝に光ファイバを嵌挿・載置した場合に、コアが、光
導波路１５に密接するような所定の厚さである。Note that the input side holding plate 35. The thickness of the output side holding plate 40 is
(2) The core has a predetermined thickness so that when the optical fiber is inserted and placed in the groove, the core comes into close contact with the optical waveguide 15.
入力側保持板３５と出力側保持板４０は、導波路基板１
４を挟んで対向して、溝３１内に嵌挿し、それぞれの保
持板の底面を溝３１の底面に、接着剤等により接着する
よう構成しである。The input side holding plate 35 and the output side holding plate 40 are connected to the waveguide substrate 1
4 are opposed to each other, and the holding plates are inserted into the grooves 31, and the bottom surfaces of the respective holding plates are bonded to the bottom surfaces of the grooves 31 using an adhesive or the like.
入力側保持板３５の■溝に入力側光ファイバ１０を嵌挿
し、出射端面を光導波路１５の開口端面に密接させ光学
接着剤を用いて、光導波路１５に接着するものとする。The input side optical fiber 10 is inserted into the groove of the input side holding plate 35, the output end face is brought into close contact with the open end face of the optical waveguide 15, and is adhered to the optical waveguide 15 using an optical adhesive.
また、入力側光ファイバ１０の外周部は、■溝に接着剤
を用いて固着する。Further, the outer peripheral portion of the input side optical fiber 10 is fixed to the groove 1 using an adhesive.
出力側保持板４０のＶ溝に、出力側光ファイバ２０−１
．２０−２・−２０−５をそれぞれ嵌挿し、入射端面を
光導波路１５の開口端面に、密接し光学接着剤を用いて
、光導波路１５に接着するものとする。The output side optical fiber 20-1 is placed in the V groove of the output side holding plate 40.
．． 20-2 and -20-5 are inserted into each other, the incident end face is brought into close contact with the open end face of the optical waveguide 15, and the optical waveguide 15 is bonded to the optical waveguide 15 using an optical adhesive.
また、それぞれの出力側光ファイバ２０−１．２０−２
−２０−５の外周部は、■溝に接着剤を用いて固着する
。In addition, each output side optical fiber 20-1.20-2
The outer periphery of -20-5 is fixed to the groove (1) using an adhesive.
上述のように組み立てられた光カプラは、入力側光ファ
イバＩＯより光信号を伝送すると、先導波路１５に結合
し、光導波路１５を進行中に横モードが７ 発生してマ
ルチモード化し拡開する。そして、先導波路１５の出射
端面において、光導波路１５の幅の全面にわたってほぼ
平等の光強度に分散する。しかし、先導波路１５以外の
外部へは拡散しない。When the optical coupler assembled as described above transmits an optical signal from the input side optical fiber IO, it is coupled to the leading waveguide 15, and while traveling through the optical waveguide 15, a transverse mode is generated, becomes a multimode, and expands. . Then, at the output end face of the leading waveguide 15, the light intensity is distributed almost equally over the entire width of the optical waveguide 15. However, it does not diffuse outside other than the leading waveguide 15.
よって、光導波路１５の出射端面に密着して並列した、
出力側光ファイバ２０−１．２０−２．・−２０−５に
、はぼ同等の強さの光信号が分配され伝送される。Therefore, in close contact with and parallel to the output end face of the optical waveguide 15,
Output side optical fiber 20-1.20-2. -20-5, an optical signal of approximately the same strength is distributed and transmitted.
本発明の光カプラは、分配する出力側光ファイバの本数
に対応した所望の幅の光導波路を、−条設けるだけであ
るので、製造が容易で低コストであり、且つ小形である
。The optical coupler of the present invention is easy to manufacture, low cost, and compact because it simply requires providing optical waveguides with a desired width corresponding to the number of output side optical fibers to be distributed.
なお、本発明は、シングルモード光ファイバに限定され
るものでなく、マルチモード光ファイバに適用できるこ
とは勿論である。Note that the present invention is not limited to single mode optical fibers, but can of course be applied to multimode optical fibers.
以上説明したように本発明は、光導波路を進行中に光信
号をマルチモード化して、先導波路の出射側端面で、横
幅−面に拡開させる導波路型光カプラであって、出力側
光ファイバが３本以上の場合であっても、はぼ等分され
た強さで光信号が分配されるのみならず、小形で、且つ
製造が容易で低コストである等、実用上で優れた効果が
ある。As explained above, the present invention is a waveguide-type optical coupler that converts an optical signal into a multi-mode while traveling through an optical waveguide and expands the width in the width plane at the output side end face of a leading waveguide, and the output side Even when there are three or more fibers, the optical signal is not only distributed with approximately equal strength, but also has excellent practical advantages such as being compact, easy to manufacture, and low cost. effective.
第１図は本発明の原理を示す構成図、
第２図（ａ）、 （ｂ）は本発明の詳細な説明する図、
第３図は本発明の実施例の斜視図、
第４図（ａ）、 （ｂ）は、それぞれ従来例の斜視図で
ある。
図において、
１１−１．Ｌ２は入力端光ファイバ、
２−１．２−２は出力側光ファイバ、
３は光結合部、
４．１４は導波路基板、
５．６−１．６−２．１５は光導波路、ｌＯは入力側光
ファイバ、
２０−１．２０−２．２０−５．２０−Ｎは出力側光フ
ァイバ、３０は基台、
３５は入力端保持板、
４０は出力側保持板をそれぞれ示す。Figure 1 is a configuration diagram showing the principle of the present invention, Figures 2 (a) and (b) are diagrams explaining the invention in detail,
FIG. 3 is a perspective view of an embodiment of the present invention, and FIGS. 4(a) and 4(b) are perspective views of a conventional example. In the figure, 11-1. L2 is the input end optical fiber, 2-1.2-2 is the output side optical fiber, 3 is the optical coupling part, 4.14 is the waveguide substrate, 5.6-1.6-2.15 is the optical waveguide, lO 20-1.20-2.20-5.20-N is the input optical fiber, 30 is the base, 35 is the input end holding plate, and 40 is the output side holding plate.
Claims (1)
、所望数の出力側光ファイバを並列した並列長にほぼ等
しい幅で、所望長の矩形板状の光導波路（１５）と、 出射端面が、該光導波路（１５）の一方の端面に密着さ
れた、一本の入力側光ファイバ（１０）と、それぞれの
入射端面が、該光導波路（１５）の他方の端面に密着し
て並列した、複数の出力側光ファイバ（２０−１、２０
−２、・・・・２０−Ｎ）と、よりなることを特徴とす
る光カプラ。[Claims] A rectangular plate-shaped optical waveguide ( 15), one input side optical fiber (10) whose output end face is closely attached to one end face of the optical waveguide (15), and each input end face is closely attached to the other end face of the optical waveguide (15). A plurality of output side optical fibers (20-1, 20
-2,...20-N).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31585487A JPH01156703A (en) | 1987-12-14 | 1987-12-14 | Optical coupler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31585487A JPH01156703A (en) | 1987-12-14 | 1987-12-14 | Optical coupler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01156703A true JPH01156703A (en) | 1989-06-20 |
Family
ID=18070380
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31585487A Pending JPH01156703A (en) | 1987-12-14 | 1987-12-14 | Optical coupler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01156703A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09178964A (en) * | 1995-12-27 | 1997-07-11 | Nhk Spring Co Ltd | Branching structure for optical waveguide |
| JPH09311235A (en) * | 1996-05-21 | 1997-12-02 | Nhk Spring Co Ltd | Branching structure of optical waveguide |
| WO2003036346A1 (en) * | 2001-10-24 | 2003-05-01 | Hitachi, Ltd. | Optical waveguide member and optical module |
| US7266277B2 (en) | 2003-05-23 | 2007-09-04 | Matsushita Electric Industrial Co., Ltd. | Optical device, optical device manufacturing method, and optical integrated device |
-
1987
- 1987-12-14 JP JP31585487A patent/JPH01156703A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09178964A (en) * | 1995-12-27 | 1997-07-11 | Nhk Spring Co Ltd | Branching structure for optical waveguide |
| JPH09311235A (en) * | 1996-05-21 | 1997-12-02 | Nhk Spring Co Ltd | Branching structure of optical waveguide |
| WO2003036346A1 (en) * | 2001-10-24 | 2003-05-01 | Hitachi, Ltd. | Optical waveguide member and optical module |
| US7054523B2 (en) | 2001-10-24 | 2006-05-30 | Hitachi, Ltd. | Optical waveguide member and optical module |
| US7266277B2 (en) | 2003-05-23 | 2007-09-04 | Matsushita Electric Industrial Co., Ltd. | Optical device, optical device manufacturing method, and optical integrated device |
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