JPS5975221A - Optical fiber transmission line - Google Patents
Optical fiber transmission lineInfo
- Publication number
- JPS5975221A JPS5975221A JP57184750A JP18475082A JPS5975221A JP S5975221 A JPS5975221 A JP S5975221A JP 57184750 A JP57184750 A JP 57184750A JP 18475082 A JP18475082 A JP 18475082A JP S5975221 A JPS5975221 A JP S5975221A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber cable
- light
- parts
- core
- 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
- G02B6/24—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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4246—Bidirectionally operating package structures
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/25—Arrangements specific to fibre transmission
- H04B10/2589—Bidirectional transmission
Abstract
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明に１本の光フアイバーケーブルによって双方向の
信号伝送を行なうようにした元ファイバー伝送路に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to an original fiber transmission line in which bidirectional signal transmission is performed using a single optical fiber cable.
１本の元ファイバーケーブルによって双方向の信号伝送
をｏＴ能とした光フアイバー伝送路は既に知られている
。Optical fiber transmission lines that enable bidirectional signal transmission over a single original fiber cable are already known.
これに、１本の光フアイバーケーブルの両１１部を複数
本に分岐せしめ、この分岐せしめり複数の光フアイバー
ケーブルの何本かを受光部用光フアイバーケーブルとし
て受光素子に結合し、残りを発光部用元ファイバーケー
ブルとして発光素子に結合したものである。For this, both 11 parts of one optical fiber cable are branched into multiple cables, some of the multiple optical fiber cables are connected to the light receiving element as an optical fiber cable for the light receiving part, and the remaining parts are used to emit light. It is connected to a light emitting element as a fiber cable.
そして、一端部の発光素子からの光を一端部の発光部用
光フアイバーケーブルに入党せしめ、この元を他端部の
受光部用光フアイバーケーブルに伝送し、他端部の受′
：／を素子に入光セしめ、寸たこれと同様に他端部の発
光素子からの光を光フアイバーケーブルを介して一端部
の受光素子に伝送するようにしている。Then, the light from the light emitting element at one end is made to enter the optical fiber cable for the light emitting section at one end, and this source is transmitted to the optical fiber cable for the light receiving section at the other end.
:/ is set to enter the element, and in the same way, light from the light emitting element at the other end is transmitted to the light receiving element at one end via the optical fiber cable.
以上の如き従来の元ファイバー伝送路においては、一端
部の発光部用光フアイバーケーブルに入光した光が中間
の光ファイバーケーブルヲ介して他端部の受光部用光フ
アイバーケーブルに入る際、他端部において分岐した発
光部用光フアイバーケーブルに光の一部が分配されてし
まい伝送損失が大きいという問題がある。In the conventional original fiber transmission line as described above, when the light entering the optical fiber cable for the light emitting section at one end enters the optical fiber cable for the light receiving section at the other end via the intermediate optical fiber cable, the light enters the optical fiber cable for the light receiving section at the other end. There is a problem in that a part of the light is distributed to the optical fiber cable for the light emitting part which branches at the part, resulting in large transmission loss.
本発明は上述の従来の問題点を改譬丁べくなされたもの
であり、その目的とするところは、伝送損失を可及的に
少なくＬｒｓ双方向の信号伝送が可能な元ファイバー伝
送路を提供するにある。The present invention has been made to correct the above-mentioned conventional problems, and its purpose is to provide an original fiber transmission line that is capable of transmitting signals in both directions with as little transmission loss as possible. There is something to do.
上記目的を運成丁べく本発明に、両端部が受光素子に結
合した受光部用元ファイバーケーブルの両噛部近傍から
小径のコア部を；ｆｆする発光部胴元ファイバーケーブ
ルを分岐せしめ、この発光部胴元ファイバーケーブルの
端部に発光素子を結合したことをその概要としている。In order to achieve the above-mentioned object, the present invention includes a light-emitting section body fiber cable having a small diameter core section branched from the vicinity of both hooks of a light-receiving section original fiber cable whose both ends are connected to a light-receiving element, and a light-emitting section main fiber cable having a small diameter core section; The outline is that a light emitting element is coupled to the end of the fiber cable.
以下に本発明の実施の一例を冷汀図面に基いて詳述する
。An example of the implementation of the present invention will be described in detail below based on cold-soil drawings.
第１図げ本発明に係る光フアイバー伝送路のｆｌｌ１１
面図、第２図はその一部１を拡大した斜視図である。Fig. 1 fl11 of the optical fiber transmission line according to the present invention
The plan view and FIG. 2 are perspective views in which part 1 is enlarged.
図中１に光フアイバーケーブルであり、この光フアイバ
ーケーブル１の中心部に汀大径の光通路となるコアＦｆ
４！Ｉ２が形成さね、ている。そしてこの元ファイバー
ケーブル１０両性部を方向性結合部３ａ、３ｂとし、元
ファイバーケーブルｌの途中から光フアイバーケーブル
４ａ、４ｂを分岐せしめ、この光フアイバーケーブル４
ａ、４ｂの元通路であるコア部５を前記光フアイバーケ
ーブルｌのコア部２よりも小径としている。1 in the figure is an optical fiber cable, and the center of this optical fiber cable 1 has a core Ff that serves as an optical path with a large diameter.
4! I2 is forming. Then, the bidirectional parts of this original fiber cable 10 are made into directional coupling parts 3a and 3b, and optical fiber cables 4a and 4b are branched from the middle of the original fiber cable l, and this optical fiber cable 4
The core portion 5, which is the original path of the fiber optic cables a and 4b, has a smaller diameter than the core portion 2 of the optical fiber cable l.
そして、光フアイバーケーブル１の方向性結合部３ａ、
３ｂにおける部分を受光部用光フアイバーケーブルｌａ
、ｌｂとしその端部を受光素子６ｉ。and a directional coupling part 3a of the optical fiber cable 1,
3b is the optical fiber cable la for the light receiving section.
, lb, and the end thereof is a light receiving element 6i.
６ｂに結合し、１に元ファイバーケーブル４ｍ。Connect to 6b and 4m of original fiber cable to 1.
４ｂを発光部胴元ファイバーケーブルとしてその端部を
集束件ロッドレンズ等を介して発光素子７ａ、７ｂに結
合している。4b is a fiber cable at the base of the light emitting section, and its ends are connected to the light emitting elements 7a and 7b via a focusing rod lens or the like.
また、元ファイバーケーブル１に元ファイバーケーブル
４ａ、４ｂを結合するにば、コア部を研磨して接綬する
か、或いは光フアイバーケーブル１と光フアイバーケー
ブル４ａ、４ｂを隣接して熱融着する等の方法によって
行なう。In addition, in order to connect the original fiber cables 4a and 4b to the original fiber cable 1, the core portions are polished and tied together, or the optical fiber cable 1 and the optical fiber cables 4a and 4b are adjacently heat-fused. This is done using methods such as
以上において、発光素子７ａからの光に方向性結合部３
ａの発洋部用光ファイバーケーブル４ａに入光し、元フ
ァイバーケーブル１を仔由して方向性結合部３ｂの受光
部用元ファイバーケーブル１− ｂと発光部用光フアイ
バーケーブル４ｂに分配され、このうち受光部用光フア
イバーケーブルｌｂに入った光が受光素子６ｂに到達す
る。一方、発光素子７ｂからの光に方向性結合部３ｂの
発光部甲光ファイバーケーブル４ｂに入光し、元ファイ
バーケーブルｌ′ｌＩ：酔由して方向性結合部３ａの受
光部用光ファイバーケーブル１ａと発光部用光フアイバ
ーケーブル４ａに分配され１．このうち受光部用光フア
イバーケーブル１ａに入った光が受光素子６ａＫ：Ｉ′
ｌ＋達する。In the above, the directional coupling portion 3 connects the light from the light emitting element 7a.
The light enters the optical fiber cable 4a for the emitter part of a, passes through the original fiber cable 1, and is distributed to the original fiber cable 1-b for the light receiving part and the optical fiber cable 4b for the light emitting part of the directional coupling part 3b, Of these, the light that has entered the optical fiber cable lb for the light receiving section reaches the light receiving element 6b. On the other hand, the light from the light emitting element 7b enters the optical fiber cable 4b of the light emitting part of the directional coupling part 3b, and is transferred to the original fiber cable l'lI: the optical fiber cable 1a for the light receiving part of the directional coupling part 3a. 1. Distributed to the optical fiber cable 4a for the light emitting part. Of these, the light that has entered the optical fiber cable 1a for the light receiving section is transmitted to the light receiving element 6aK:I'
l+ reaches.
このとき、発光部胴元ファイバーケーブル４ａ。At this time, the fiber cable 4a at the base of the light emitting section.
４ｂのコア部５の径げ受光部用光フアイバ−ケーブルｌ
ａ、ｌｂのコア部２の径に比べ小径であるので光フアイ
バーケーブル１からの光のうち発光部用＋ファイバーケ
ーブルｌａ、ｌｂに分配される歇に極めて少なくなる。Optical fiber cable l for the tapered light receiving part of the core part 5 of 4b
Since the diameter is smaller than that of the core portion 2 of the fiber optic cables 1 and 1b, very little of the light from the optical fiber cable 1 is distributed to the light emitting portion + fiber cables la and lb.
尚、図示例でに受光部用光フアイバーケーブル及び発光
部用光フアイバーケーブルがそれぞれ１本づつのものを
示したが、その本数は任意である。Although the illustrated example shows one optical fiber cable for the light receiving section and one optical fiber cable for the light emitting section, the number thereof is arbitrary.
以上の説明で明らかな如く５本発明によれば、双方向に
光信号の伝送を０Ｔ能とした光フアイバー伝送路におい
て、枝分れし定発光部用光ファイバーケーブルのコア部
の径を受光部用光フアイバーケーブルのコア部の径より
も小径とし瓦ので、分配の際に発光部用光ファイバーケ
ーブルに入る光の前を減少せしめることができ、伝送損
失の低減を図ることができる等多くの私意を発揮する。As is clear from the above explanation, according to the present invention, in an optical fiber transmission line with 0T capability for transmitting optical signals in both directions, the diameter of the core part of the branched constant light emitting part optical fiber cable is set to the light receiving part. Since the diameter of the tile is smaller than the diameter of the core part of the optical fiber cable for use in the optical fiber cable, it is possible to reduce the amount of light that enters the optical fiber cable for the light emitting part during distribution, and it is possible to reduce transmission loss. demonstrate one's will.
第１図に本発明に係る光フアイバー伝送路の側面図、第
２図は同党ファイバー伝送路の要部拡大斜視図である。
ｌ・・・光伝送用の光フアイバーケーブル、２．５・・
・コア部、ｌａ、ｌｂ・・・受光部用光ファイバーケー
ブル、４ａ、４ｂ・・・発光部用光フアイバーケーブル
、６ａ、６ｂ・・・受光索子、７ａ、７ｂ・・・発光素
子。
出願人代理人 猪 股 清
（７）FIG. 1 is a side view of an optical fiber transmission line according to the present invention, and FIG. 2 is an enlarged perspective view of a main part of the optical fiber transmission line. l...Optical fiber cable for optical transmission, 2.5...
- Core part, la, lb... optical fiber cable for light receiving part, 4a, 4b... optical fiber cable for light emitting part, 6a, 6b... light receiving cable, 7a, 7b... light emitting element. Applicant's agent Kiyoshi Inomata (7)
Claims (1)
ァイ・々−ケーブルに分岐せしめるとともに、この初数
の光ノアイノ９−ケーブルのうち光通路となるコア部が
大径の光フアイバーケーブルを受光部用光フアイバーケ
ーブルとしてその端面を受光素子に結合し、また光通路
となるコア部が小径の光フアイバーケーブルを発光部用
光ファイバーケーゾルとしてその端面を発光素子に結合
したことを％敵とする光ファイバー伝送路。Both ends of the original fiber cable for original transmission are branched into multiple optical fiber cables, and among these initial optical fiber cables, the core part that serves as the optical path receives light from the large-diameter optical fiber cable. The end face is connected to a light-receiving element as an optical fiber cable for a part, and the end face is connected to a light-emitting element as an optical fiber cable for a light-emitting part, and an optical fiber cable with a small diameter core serving as an optical path is used as an optical fiber cable for a light-emitting part. Optical fiber transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57184750A JPS5975221A (en) | 1982-10-22 | 1982-10-22 | Optical fiber transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57184750A JPS5975221A (en) | 1982-10-22 | 1982-10-22 | Optical fiber transmission line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5975221A true JPS5975221A (en) | 1984-04-27 |
Family
ID=16158683
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57184750A Pending JPS5975221A (en) | 1982-10-22 | 1982-10-22 | Optical fiber transmission line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5975221A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251707A (en) * | 1986-04-24 | 1987-11-02 | Fujitsu Ltd | Optical passive parts |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5345249A (en) * | 1976-10-04 | 1978-04-22 | Mitsubishi Electric Corp | Light transmitting device |
| JPS57186856A (en) * | 1981-05-13 | 1982-11-17 | Omron Tateisi Electronics Co | Single line bi-direction optical transmitting device |
| JPS5940619A (en) * | 1982-07-28 | 1984-03-06 | シ−メンス・アクチエンゲゼルシヤフト | Optical fiber coupler and manufacture thereof |
-
1982
- 1982-10-22 JP JP57184750A patent/JPS5975221A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5345249A (en) * | 1976-10-04 | 1978-04-22 | Mitsubishi Electric Corp | Light transmitting device |
| JPS57186856A (en) * | 1981-05-13 | 1982-11-17 | Omron Tateisi Electronics Co | Single line bi-direction optical transmitting device |
| JPS5940619A (en) * | 1982-07-28 | 1984-03-06 | シ−メンス・アクチエンゲゼルシヤフト | Optical fiber coupler and manufacture thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62251707A (en) * | 1986-04-24 | 1987-11-02 | Fujitsu Ltd | Optical passive parts |
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