JPH01295210A - Optical multiplexer/demultiplexer for wavelength multiplexing and optical multiplexed signal transmitter/ receiver - Google Patents
Optical multiplexer/demultiplexer for wavelength multiplexing and optical multiplexed signal transmitter/ receiverInfo
- Publication number
- JPH01295210A JPH01295210A JP12495388A JP12495388A JPH01295210A JP H01295210 A JPH01295210 A JP H01295210A JP 12495388 A JP12495388 A JP 12495388A JP 12495388 A JP12495388 A JP 12495388A JP H01295210 A JPH01295210 A JP H01295210A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical fiber
- demultiplexer
- ferrule
- multiplexer
- 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 47
- 239000013307 optical fiber Substances 0.000 claims abstract description 45
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 abstract description 4
- 230000008878 coupling Effects 0.000 abstract description 3
- 238000010168 coupling process Methods 0.000 abstract description 3
- 238000005859 coupling reaction Methods 0.000 abstract description 3
- 239000000835 fiber Substances 0.000 abstract description 3
- 239000002184 metal Substances 0.000 abstract description 3
- 125000006850 spacer group Chemical group 0.000 abstract description 3
- 239000010453 quartz Substances 0.000 abstract description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract description 2
- 239000005304 optical glass Substances 0.000 abstract 1
- 239000011521 glass Substances 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 3
- 239000000758 substrate Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000679 solder Inorganic materials 0.000 description 2
- 239000004033 plastic Substances 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は波長多重用光合分波器とそれを用いた光多重化
送受信装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical multiplexer/demultiplexer for wavelength multiplexing and an optical multiplexing transmitter/receiver using the same.
従来の光合分波器は、例えば特開昭６０−１３５９１０
に記載されているようにフィルタ、光ファイバ、ロンド
レンズ等の光学部品を基板上に幾何学的に配置するもの
が知られている。また、電気通信学会、０ＱＥ−８６−
１９３の図１及び図２にも類似の構成となる光合分波器
が紹介されている。つまり、第３図は従来の光合分波器
の例を示した断面図で、その構造は、ガラスブロック９
′の片面にフィルタ１０が装着されており、このガラス
ブロック後挟んで送信ボート３０ａ、受信ボート３０ｂ
、共通ボート３０ｃの３ボートが、図示されていない基
板上に上記ガラスブロックと共に転写治具を用いて光軸
合せ後、接着あるいは半田等により固定されたものとな
っていた。なお、各ボートは、スリーブ（ホルダ）３１
内にフェルール３２に案内された光ファイバ３３ （３
３ａ、３３ｂ、３３Ｃ）とスペーサ４を介して装着され
たレンズ８とで構成されている。A conventional optical multiplexer/demultiplexer is disclosed in, for example, Japanese Patent Application Laid-Open No. 60-135910.
It is known that optical components such as filters, optical fibers, and Rondo lenses are arranged geometrically on a substrate as described in . Also, Institute of Electrical Communication Engineers, 0QE-86-
An optical multiplexer/demultiplexer with a similar configuration is also introduced in FIGS. 1 and 2 of 193. In other words, FIG. 3 is a cross-sectional view showing an example of a conventional optical multiplexer/demultiplexer, and its structure consists of a glass block 9
A filter 10 is attached to one side of the glass block, and a transmitting boat 30a and a receiving boat 30b are sandwiched between the glass blocks.
, and the common boat 30c are fixed on a substrate (not shown) together with the glass block by adhesive, solder, etc. after aligning the optical axes using a transfer jig. In addition, each boat has a sleeve (holder) 31
The optical fiber 33 (3
3a, 33b, 33C) and a lens 8 attached via a spacer 4.
上記従来技術は、レンズホルダ、フィルタ、ガラスブロ
ック等高い部品寸法精度が要求され、かつ、これらの基
板への固定には、極めて高い部品搭載精度が要求され、
かくして結合光学系の光軸ずれを低減させ、光合分波器
を構成してしまた。The above conventional technology requires high dimensional accuracy of components such as lens holders, filters, and glass blocks, and extremely high component mounting accuracy is required for fixing these to the substrate.
In this way, the optical axis deviation of the coupling optical system is reduced, and an optical multiplexer/demultiplexer is constructed.
しかるに従来技術では、部品側々の高い寸法精度と極め
て高い組立精度のため、組立能率が悪く、光合分波器の
高価格化、歩留り低下となることは勿論のこと、各入出
力ボートの幾何学的配置に伴ってガラスブロックの大き
さが決まるため、光合分波器の小形軽量化が困難である
等の技術課題が残されていた。However, in the conventional technology, due to the high dimensional accuracy of the parts and the extremely high assembly accuracy, assembly efficiency is poor, which not only increases the cost of the optical multiplexer/demultiplexer and reduces yield, but also causes problems with the geometry of each input/output board. Since the size of the glass block is determined by the optical arrangement, technical issues remain, such as the difficulty of making the optical multiplexer/demultiplexer smaller and lighter.
本発明の目的は、上記技術課題を解決することにあり、
その第１の目的は小形でかつ組立性に優れた波長多重用
光合分波器を提供することにあり、その第２の目的はそ
れを用いた光多重化送受信装置を提供することにある。The purpose of the present invention is to solve the above technical problem,
The first objective is to provide an optical multiplexer/demultiplexer for wavelength multiplexing that is small and has excellent assembly efficiency, and the second objective is to provide an optical multiplexing transmitter/receiver using the optical multiplexer/demultiplexer.
上記本発明の第１の目的は、中空筒体から成るホルダの
両端にそれぞれフェルールに案内された光ファイバの一
端面が対向して、かつ、所定の間隔をおいて装着される
と共にこれら両光ファイバ端面間に集光またはコリメー
ト用のレンズ系とバンドパスフィルタとを配設内蔵せし
めて成ることを特徴とする波長多重用光合分波器によっ
て達成される。The first object of the present invention is to attach one end surface of each optical fiber guided by a ferrule to each end of a holder made of a hollow cylinder and to face each other at a predetermined interval. This is achieved by an optical multiplexer/demultiplexer for wavelength division multiplexing, which is characterized by having a built-in lens system for condensing or collimating light and a bandpass filter disposed between fiber end faces.
そして、上記一方のフェルールには少なくとも共通ボー
ト光ファイバが案内されると共に他方のフェルールには
送信及び／又は受信ボート光ファイバが案内されて成る
ことを特徴とする。At least a common boat optical fiber is guided in one of the ferrules, and a transmitting and/or receiving boat optical fiber is guided in the other ferrule.
また、上記一方のフェルールには多重化された光伝送路
を構成する共通ボート光ファイＡと受信又は送信ボート
光ファイバとが案内され、他方のフェルールには送信又
は受信ボート光ファイノベが案内されて成ることを特徴
とする。In addition, the common boat optical fiber A and the receiving or transmitting boat optical fiber constituting the multiplexed optical transmission line are guided to one of the ferrules, and the transmitting or receiving boat optical fiber is guided to the other ferrule. It is characterized by becoming.
さらにまた、上記受光ボート光ファイバの口径を他の光
ファイバのそれよりも大なるもので構成し、受光容易な
構造とすることが望ましい。Furthermore, it is desirable that the diameter of the light-receiving boat optical fiber is larger than that of the other optical fibers to facilitate light reception.
そして、本発明の第２の目的は、上記第１の目的を達成
する波長多重用光合分波器を、光通信導波路における合
分波手段として具備して成ることを特徴とする光多重化
送受信装置によって達成される。A second object of the present invention is to provide optical multiplexing, characterized in that the optical multiplexer/demultiplexer for wavelength multiplexing that achieves the first object is provided as a multiplexer/demultiplexer in an optical communication waveguide. This is accomplished by a transmitting and receiving device.
上記ホルダ内に配設されるレンズ系は、ホルダ内両端部
フェルールにより案内された光ファイノベからの入出力
光結合効率向上のために設けられるもので、例えば球又
は円柱状のレンズ系が、そしてバンドパスフィルタとし
ては所定の波長を選択するためのもので、レンズに隣接
して独立に光路上に設けてもよく、もしくは予めガラス
ブロックの一面に光軸に対し所定の傾斜をもたせて装着
しておきこれをレンズに隣接して設けてもよシ）シ、場
合によっては光ファイバの端面に直接固定してもよい。The lens system disposed inside the holder is provided to improve the coupling efficiency of input and output light from the optical fiber novel guided by the ferrules at both ends in the holder, for example, a spherical or cylindrical lens system, and A bandpass filter is used to select a predetermined wavelength, and may be installed adjacent to the lens and independently on the optical path, or it may be installed in advance on one side of a glass block with a predetermined inclination to the optical axis. This may be provided adjacent to the lens, or may be directly fixed to the end face of the optical fiber in some cases.
光合分波器を構成する各光部品、例えば光ファイバを案
内するフェルール、レンズ系、パントノ（スフィルタ等
の寸法あるいはフィルタの傾斜角等は予め定められてお
り、各部品を同一ホルダ内に順次挿入し、組立てていく
ことにより、各ボートの光軸合せをすることもなく容易
に組立てることができる。The dimensions of each optical component constituting the optical multiplexer/demultiplexer, such as the ferrule for guiding the optical fiber, the lens system, the pantonous filter, the angle of inclination of the filter, etc., are determined in advance, and each component is placed in the same holder one after another. By inserting and assembling, it can be easily assembled without having to align the optical axes of each boat.
上記ホルダとしては中空筒状で、好ましくは円筒である
が、例えば金属、プラスチックス、セラミックス等の光
を通しにくい、しかも熱膨張係数の小さな材質のもので
あればいずれでも良い。）ェルールは、光ファイバの補
強を兼ねるもので、上記ホルダと同材質のものでよく、
例えば光ファイバと熱膨張係数が近いセラミックス等が
好ましい。The holder has a hollow cylindrical shape, preferably a cylinder, but may be made of any material that does not allow light to pass through, such as metal, plastic, or ceramic, and has a small coefficient of thermal expansion. ) The ferrule also serves as reinforcement for the optical fiber, and may be made of the same material as the holder above.
For example, it is preferable to use ceramics, which has a coefficient of thermal expansion similar to that of optical fibers.
ホルダ両端のフェルールはホルダの貫通穴に精度よくか
ん合するため、各ポート用光ファイバの光軸合せは不要
となる。後の実施例の第１図の中で詳述するが、例えば
送信ボー１−と共通ポートの光経路は送信ポート光ファ
イバ、球レンズ、フィルタ、球レンズ、共通ポート光フ
ァイバとなり、一方共通ポートと受信ポートの光経路は
、共通ポート光ファイバ、球レンズ、フィルタにより反
射、共通ポート側球レンズ、受信ポート光ファイバとな
る。Since the ferrules at both ends of the holder fit accurately into the through holes of the holder, there is no need to align the optical axes of the optical fibers for each port. As will be explained in detail later in FIG. 1 of the embodiment, for example, the optical path between the transmit port 1- and the common port is a transmit port optical fiber, a ball lens, a filter, a ball lens, and a common port optical fiber, while the common port The optical path of the receiving port is reflected by the common port optical fiber, the ball lens, and the filter, then the common port side ball lens, and the receiving port optical fiber.
以下、図面により本発明を具体的に説明する。 Hereinafter, the present invention will be specifically explained with reference to the drawings.
実施例１
第１図は本発明の一実施例となる光合分波器の構造を示
すもので、金属からなる中空円筒のホルダ１内の片側に
例えば送信ポート用の石英等よりなる光ファイバ２が挿
入されたセラミック等よりなるフェルール３が挿入され
る。ホルダ１のもう一方の端部には例えば共通ポート用
光ファイバ６および受信ポート用光ファイバ７を各１本
ずつ挿入したフェルール５が挿入される。フェルール３
およびフェルール５の前面には光ファイバ２．６．７と
光学ガラスＢＫ−７等よりなる球レンズあるいは円柱レ
ンズ８．８′との結合効率を上げるための同じ＜ＢＫ−
７等よりなるスペーサ４が設けられている。更に球レン
ズ８．８′間には、ＢＫ−７等よりなるガラスブロック
９に誘電体多層膜フィルタ１０を搭載した合分波ブロッ
クが配置される。Embodiment 1 FIG. 1 shows the structure of an optical multiplexer/demultiplexer according to an embodiment of the present invention. An optical fiber 2 made of quartz or the like for a transmission port is attached to one side of a hollow cylindrical holder 1 made of metal. A ferrule 3 made of ceramic or the like is inserted. A ferrule 5 into which, for example, one common port optical fiber 6 and one reception port optical fiber 7 are inserted is inserted into the other end of the holder 1. Ferrule 3
The front surface of the ferrule 5 is provided with the same <BK-
A spacer 4 made of 7 or the like is provided. Further, between the ball lenses 8 and 8', a multiplexing/demultiplexing block is arranged, which has a dielectric multilayer filter 10 mounted on a glass block 9 made of BK-7 or the like.
なお、このガラスブロック９はフィルタ１０を支持する
ために設けたもので、レンズ８．８′の位置決めも兼ね
ているが、必ずしもなければならないというものではな
い。フィルタ１０やレンズ８．８′を他の手段で固定す
ることもでき、その場合はガラスブロック９を省略する
ことができる。Note that this glass block 9 is provided to support the filter 10 and also serves to position the lens 8.8', but it is not necessary. It is also possible to fix the filter 10 and the lens 8.8' by other means, in which case the glass block 9 can be omitted.
第２図は上記第１−図のフェルール５の構造を示すもの
で共通ポート用光ファイバ６を挿入する貫通穴５ａと受
信ポート用光フアイバ７を挿入する貫通穴５ｂとが設け
られる。通常受光し易くするため、受信ポート用光ファ
イバ７の直径は、共通ポー１〜用光フアイバ６あるいは
送信ポート用光ファイバ２よりも太目であり、従ってフ
ェルール５の受信ポート用貫通穴５ｂも太目であること
が望ましい。FIG. 2 shows the structure of the ferrule 5 shown in FIG. 1, in which a through hole 5a into which the common port optical fiber 6 is inserted and a through hole 5b into which the receiving port optical fiber 7 is inserted are provided. Normally, in order to facilitate light reception, the diameter of the receiving port optical fiber 7 is thicker than that of the common ports 1 to 6 or the transmitting port optical fiber 2, and therefore the receiving port through hole 5b of the ferrule 5 is also thicker. It is desirable that
フィルタ１０はホルダ１の中心軸に対して僅かに傾斜さ
せ、共通ポート用光フアイバ６からの光を受信ポート用
光ファイバ７に効率よく受光できるよう予め決められて
いる。本発明における光合分波器において、各部品の固
定は接着、あるいは半田等により行なわれる。The filter 10 is slightly inclined with respect to the central axis of the holder 1, and is predetermined so that the light from the common port optical fiber 6 can be efficiently received by the receiving port optical fiber 7. In the optical multiplexer/demultiplexer according to the present invention, each component is fixed by adhesive, solder, or the like.
実施例２
第４図は、第１図のガラスブロック９を省略した例を示
した断面図で、送信ポート用光ファイバ２及び受信ポー
ト用光ファイバ７の端面にはそれぞれ、あらかじめフィ
ルタ１０’、１０を装着している。なお、１１はレンズ
８．８′を固定するリングである。Embodiment 2 FIG. 4 is a cross-sectional view showing an example in which the glass block 9 in FIG. I am wearing 10. Note that 11 is a ring for fixing the lens 8.8'.
実施例３
第５図は、第４図のレンズ８．８′のうちの一方のレン
ズ８′を省略し、レンズ８をリング１１で両側から固定
した例である。Embodiment 3 FIG. 5 shows an example in which one of the lenses 8 and 8' in FIG. 4 is omitted, and the lens 8 is fixed from both sides with rings 11.
本発明によれば、
（１）ファイバの光軸合せが不要
（２）組立が極めて容易
（３）著しく小形化可能
などの効果があるため、小形で組立性の良い、量産性に
優れた光合分波器の提供が可能となる。According to the present invention, (1) there is no need to align the optical axes of fibers, (2) assembly is extremely easy, and (3) the size can be significantly reduced. It becomes possible to provide a duplexer.
第１図は本発明の一実施例となる光合分波器の断面図、
第２図は第１図に用いられた本発明の実施例となる光合
分波器におけるフェルールの斜視図、第３図は従来の光
合分波器の断面図、第４図及び第５図はそれぞれ異なる
本発明の他の実施例となる光合分波器の断面図である。
図において、
１・・・ホルダ ２．６．７・・・光ファイ
バ３．５・・・フェルール
８．８′・・・球又は円柱レンズ
１０・・・フィルタ １１・・・レンズ固定用
リング代理人弁理士 中 村 純之助
区
ハ
Ｓ
コFIG. 1 is a sectional view of an optical multiplexer/demultiplexer which is an embodiment of the present invention.
Figure 2 is a perspective view of the ferrule in the optical multiplexer/demultiplexer used in Figure 1, which is an embodiment of the present invention, Figure 3 is a sectional view of a conventional optical multiplexer/demultiplexer, and Figures 4 and 5 are FIG. 7 is a cross-sectional view of an optical multiplexer/demultiplexer as other different embodiments of the present invention. In the figure, 1... Holder 2.6.7... Optical fiber 3.5... Ferrule 8.8'... Ball or cylindrical lens 10... Filter 11... Lens fixing ring substitute Junnosuke Nakamura, Patent Attorney, HaS Co.
Claims (1)
ルに案内された光ファイバの一端面が対向して、かつ、
所定の間隔をおいて装着されると共にこれら両光ファイ
バ端面間に集光またはコリメート用のレンズ系とバンド
パスフィルタとを配設内蔵せしめて成ることを特徴とす
る波長多重用光合分波器。 ２、上記一方のフェルールには少なくとも共通ポート光
ファイバが案内されると共に他方のフェルールには送信
及び／又は受信ポート光ファイバが案内されて成ること
を特徴とする請求項１記載の波長多重用光合分波器。 ３、上記一方のフェルールには多重化された光伝送路を
構成する共通ポート光ファイバと受信又は送信ポート光
ファイバとが案内され、他方のフェルールには送信又は
受信ポート光ファイバが案内されて成ることを特徴とす
る請求項１もしくは請求項２記載の波長多重用光合分波
器。 ４、上記受光ポート光ファイバの口径を他の光ファイバ
のそれよりも大なるもので構成し、受光容易な構造とし
たことを特徴とする請求項１、請求項２もしくは請求項
３記載の波長多重用光合分波器。 ５、請求項１、請求項２、請求項３もしくは請求項４記
載の波長多重用光合分波器を、光通信導波路における合
分波手段として具備して成ることを特徴とする光多重化
送受信装置。[Claims] 1. One end surface of an optical fiber guided by a ferrule faces each end of a holder made of a hollow cylinder, and
1. An optical multiplexer/demultiplexer for wavelength division multiplexing, characterized in that a lens system for condensing or collimating light and a bandpass filter are disposed and built in between the end faces of these optical fibers, and are installed at a predetermined interval. 2. The wavelength multiplexing optical combiner according to claim 1, wherein at least a common port optical fiber is guided in one of the ferrules, and a transmitting and/or receiving port optical fiber is guided in the other ferrule. Duplexer. 3. A common port optical fiber and a receiving or transmitting port optical fiber constituting a multiplexed optical transmission line are guided in one of the ferrules, and a transmitting or receiving port optical fiber is guided in the other ferrule. The optical multiplexer/demultiplexer for wavelength multiplexing according to claim 1 or 2, characterized in that: 4. The wavelength according to claim 1, claim 2, or claim 3, characterized in that the diameter of the light receiving port optical fiber is larger than that of other optical fibers, and has a structure that facilitates light reception. Optical multiplexer/demultiplexer for multiplexing. 5. Optical multiplexing, characterized in that the optical multiplexer/demultiplexer for wavelength multiplexing according to claim 1, claim 2, claim 3, or claim 4 is provided as a multiplexer/demultiplexer in an optical communication waveguide. Transmitting/receiving device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12495388A JPH01295210A (en) | 1988-05-24 | 1988-05-24 | Optical multiplexer/demultiplexer for wavelength multiplexing and optical multiplexed signal transmitter/ receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP12495388A JPH01295210A (en) | 1988-05-24 | 1988-05-24 | Optical multiplexer/demultiplexer for wavelength multiplexing and optical multiplexed signal transmitter/ receiver |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01295210A true JPH01295210A (en) | 1989-11-28 |
Family
ID=14898300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP12495388A Pending JPH01295210A (en) | 1988-05-24 | 1988-05-24 | Optical multiplexer/demultiplexer for wavelength multiplexing and optical multiplexed signal transmitter/ receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01295210A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7356223B2 (en) | 2005-01-19 | 2008-04-08 | Nippon Sheet Glass Company, Limited | Optical filter element and wavelength division multiplexing optical coupler |
| WO2009075168A1 (en) * | 2007-12-11 | 2009-06-18 | Nippon Electric Glass Co., Ltd. | Optical device and lens assembly |
-
1988
- 1988-05-24 JP JP12495388A patent/JPH01295210A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7356223B2 (en) | 2005-01-19 | 2008-04-08 | Nippon Sheet Glass Company, Limited | Optical filter element and wavelength division multiplexing optical coupler |
| WO2009075168A1 (en) * | 2007-12-11 | 2009-06-18 | Nippon Electric Glass Co., Ltd. | Optical device and lens assembly |
| JP2009145427A (en) * | 2007-12-11 | 2009-07-02 | Nippon Electric Glass Co Ltd | Optical device and lens assembly |
| US8279542B2 (en) | 2007-12-11 | 2012-10-02 | Nippon Electric Glass Co., Ltd. | Optical device and lens assembly |
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