JPS60164706A - Optical fiber transmitting system - Google Patents

Optical fiber transmitting system

Info

Publication number
JPS60164706A
JPS60164706A JP59020007A JP2000784A JPS60164706A JP S60164706 A JPS60164706 A JP S60164706A JP 59020007 A JP59020007 A JP 59020007A JP 2000784 A JP2000784 A JP 2000784A JP S60164706 A JPS60164706 A JP S60164706A
Authority
JP
Japan
Prior art keywords
optical fiber
optical
inter
receiving end
light emitting
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
Application number
JP59020007A
Other languages
Japanese (ja)
Inventor
Susumu Nakatani
晋 中谷
Minoru Kakehi
筧　実
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Oki Electric Industry Co Ltd
Original Assignee
Oki Electric Industry Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Oki Electric Industry Co Ltd filed Critical Oki Electric Industry Co Ltd
Priority to JP59020007A priority Critical patent/JPS60164706A/en
Publication of JPS60164706A publication Critical patent/JPS60164706A/en
Pending legal-status Critical Current

Links

Classifications

    • 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
    • H04B10/2507—Arrangements specific to fibre transmission for the reduction or elimination of distortion or dispersion

Landscapes

  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Light Guides In General And Applications Therefor (AREA)
  • Optical Couplings Of Light Guides (AREA)
  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
  • Optical Communication System (AREA)

Abstract

PURPOSE:To suppress a connection loss in a connecting part of an inter-device optical fiber and a photodetecting end optical fiber, to the minimum by using an optical fiber of a large aperture, namely, using an optical fiber whose core diameter is thicker than a light emitting end optical fiber and the inter-device optical fiber. CONSTITUTION:An optical signal converted from an electric signal by an E/O converting element 12 of a light emitting end device 10 is made incident on a light emitting end optical fiber 13. Also, this optical signal passes through an inter-device optical fiber 18 and a photodetecting end optical fiber 15 and reaches an O/E converting element 14 of a photodetecting and device 11, and it is converted to an electrical signal and outputted. As for the photodetecting end optical fiber 15, an optical fiber whose core diameter is thicker than the inter- device optical fiber 18, therefore, a connection loss in a connecting part of both of them by an optical connector 18 is suppressed to the minimum. As a result, it can be confirmed that the connection loss of the whole optical fiber transmitting system is reduced, and also no influence is exerted on the frequency characteristic.

Description

【発明の詳細な説明】 〔技術分野〕 本発明は、光フアイバ同志の接続部において発生する軸
ずｔによる接続損失を最小限に抑制することができる光
フアイバ伝送方式に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to an optical fiber transmission system that can minimize connection loss due to axial deviation t occurring at the connection portion of optical fibers.

〔従来技術〕[Prior art]

第１図は一般的な光伝送方式の基本的構成図で、図にお
いて１は発光端装置、２は受光端装置である。FIG. 1 is a basic configuration diagram of a general optical transmission system. In the figure, 1 is a light emitting end device and 2 is a light receiving end device.

この発光端装置１はＬＥＤ等のＥ１０変換素子３及び発
光端光ファイバ４を有し、また受光端装置２はＰＩＮ−
ＰＤ等の０／Ｅ変換素子５及び受光端光ファイバ６を有
しており、発光端光ファイバ４と受光端光フアイバ６間
は光コネクタ７．８′ｊｋ介して装置間光ファイバ９に
より光学的９機械的に接続さｎている。This light emitting end device 1 has an E10 conversion element 3 such as an LED and a light emitting end optical fiber 4, and the light receiving end device 2 has a PIN-
It has an O/E conversion element 5 such as a PD and a light-receiving end optical fiber 6, and an inter-device optical fiber 9 connects the light-emitting end optical fiber 4 and the light-receiving end optical fiber 6 via an optical connector 7.8'jk. 9 Mechanically connected.

従って、発光端装置１のＥ１０変換素子３により電気信
号から変換さｎた光信号は発光端光ファイバ４に入射し
、更にこの光信号は装置間光ファイバ９、及び受光端光
ファイバ６を経て受光端装置２のＯ／Ｅ変換素子５に到
達し、電気信号に変換さ几て出力さｎる。Therefore, the optical signal converted from the electrical signal by the E10 conversion element 3 of the light emitting end device 1 enters the light emitting end optical fiber 4, and this optical signal further passes through the inter-device optical fiber 9 and the light receiving end optical fiber 6. The signal reaches the O/E conversion element 5 of the light receiving end device 2, is converted into an electrical signal, and is output.

ところで、このような光フアイバ伝送方式に使用さルる
光ファイバは、帯域制限の面から細径なもの、例えばコ
ア径５０μｍ程度の光ファイバに限られているが、光フ
ァイバの接続損失は細径なもの程大きくなる。By the way, the optical fibers used in such optical fiber transmission systems are limited to small diameter ones, for example, optical fibers with a core diameter of about 50 μm due to band limitations, but the splice loss of optical fibers is small. The larger the diameter, the larger it becomes.

特に、従来の光フアイバ伝送方式においては、発光端光
ファイバ４．受光端光ファイバ６、及び装置間光ファイ
バ９にすべて同一径の光ファイバを使用していたため、
装置の保守の為に必ず存在する光コネクタＴ、８による
接続部での接続損失を避けることができず、光フアイバ
伝送系全体の接続損失が大きいという欠点を有して−た
。In particular, in the conventional optical fiber transmission system, the light emitting end optical fiber 4. Since optical fibers with the same diameter were used for the receiving end optical fiber 6 and the inter-device optical fiber 9,
It is not possible to avoid connection loss at the connection portion due to the optical connectors T and 8, which are always present for maintenance of the device, and the problem is that the connection loss of the entire optical fiber transmission system is large.

〔発明の目的〕[Purpose of the invention]

本発明は」二連した従来技術の欠点を解決するためにな
さ扛たもので、光フアイバ同志の接続による損失を減少
させることができる光フアイバ伝送方式を実現すること
を目的とするものである。The present invention was made in order to solve the two drawbacks of the prior art, and its object is to realize an optical fiber transmission system that can reduce the loss caused by connecting optical fibers together. .

〔発明の概要〕[Summary of the invention]

この目的を達成するため、本発明は受光端装置内での伝
送長が数１０鋸から長くても数ｍであり、かつファイバ
損失や帯域制限の影響を全く受けなイバを使用して、つ
まり発光端光ファイバとして装置間光ファイバよりコア
径の太い光ファイバを使用して、発光端光ファイバと装
置間光ファイバとの接続部における接続損失を最小限に
抑えらｎるようにしたものである。In order to achieve this objective, the present invention uses a fiber whose transmission length within the receiving end device is several tens of meters to several meters at the longest, and which is completely unaffected by fiber loss or band limitation. An optical fiber with a larger core diameter than the inter-device optical fiber is used as the light-emitting end optical fiber to minimize connection loss at the connection between the light-emitting end optical fiber and the inter-device optical fiber. be.

〔実施例〕〔Example〕

以下図面を参照して実施例を説明する。 Examples will be described below with reference to the drawings.

まず第３図は本発明を実施すべく実測した光ファイバの
コア径ｆ　ハラメータとしたときの軸ず扛量と接続損失
との関係を示すグラフであり、こルによ几ば、コア径５
０μｍの光フアイバ同志を接続した例では数μｍの軸ず
ルですでにｌｄＢ以上の接続損失が確認さｎたが、入力
側をコア径５０μｍの光ファイバとし、出力側にコア径
１００μｍの光ファイバを使用して接続した例では、広
範囲にわたって接続損失は端面反射のみに抑制すること
が可能であった。First of all, FIG. 3 is a graph showing the relationship between the amount of axial deviation and the splice loss when the core diameter f of the optical fiber was actually measured in order to implement the present invention.
In an example in which optical fibers with a diameter of 0 μm were connected, a connection loss of more than 1 dB was already confirmed due to an axis misalignment of several μm. In an example in which a fiber was used for connection, it was possible to suppress connection loss to only end face reflection over a wide range.

第３図は、第２図における実験データを確認するために
用いら扛た本発明による光フアイバ伝送３一 方式の一実施例を示す基本構成図で、１０は発光端装置
、１１は受光端装置である。FIG. 3 is a basic configuration diagram showing an embodiment of a three-way optical fiber transmission system according to the present invention, which was used to confirm the experimental data shown in FIG. It is a device.

この発光端装置１０はＬＥＤ等のＥ１０変換素子１２及
び発光端光ファイバ１３を有し、また受光端装置１１は
ＰＩＮ−ＰＤ等のＯ／Ｅ変換索子１４及び受光端光ファ
イバ１５を有しており、宛先端光ファイバ１３と受光端
光フアイバ１５間は光コネクタ１６．１７’ｉ介して装
置間光ファイバ１８により光学的１機械的に接続されて
いるが、本実施例では発光端光ファイバ１３と装置間光
ファイバ１８としてコア径５０μｍの光ファイバを、ま
た受光端光ファイバ１５としてコア径１００μｍの光フ
ァイバを使用し、更にこれらの光ファイバを使用した効
果全明確にするため、光コネクタ１６．１．１７として
プラスチック光コネクタを使用している。The light emitting end device 10 has an E10 conversion element 12 such as an LED and a light emitting end optical fiber 13, and the light receiving end device 11 has an O/E conversion cable 14 such as a PIN-PD and a light receiving end optical fiber 15. The destination end optical fiber 13 and the light receiving end optical fiber 15 are optically and mechanically connected by the inter-device optical fiber 18 via optical connectors 16 and 17'i. An optical fiber with a core diameter of 50 μm was used as the optical fiber 18 between the fiber 13 and the device, and an optical fiber with a core diameter of 100 μm was used as the receiving end optical fiber 15. Furthermore, in order to fully clarify the effects of using these optical fibers, the optical Plastic optical connectors are used as connectors 16.1.17.

尚、発光端光ファイバ１３及び受光端光ファイバ１５の
長さは各々１ｍであり、また装置間光ファイバ１Ｂの長
さはＩＫＩｌｌであるがこｎに限らｎるものではない。The lengths of the light-emitting end optical fiber 13 and the light-receiving end optical fiber 15 are each 1 m, and the length of the inter-device optical fiber 1B is IKIll, but is not limited to n.

この構成における動作は、第１図の場合と同様４− で、発光端装置１０のＥ１０変換素子１２により電気信
号から変換さ几た光信号は発光端光ファイバ１３に入射
し、更にこの光信号は装置間光ファイバ１８、及び受光
端光ファイバ１５を経て受光端装置１１の０／Ｅ変換素
子１４に到達し、電気信号に変換されて出力さ几るが、
前述の如く受光端光ファイバ１５として装置間光ファイ
バ１８よりコア径の太い光ファイバを用いているため、
光コネクタ１７による両者の接続部での接続損失は最小
限に抑制さｎｌその結果、光フアイバ伝送系全体の接続
損失は、従来に比べて平均１ｄＢ以上低減することが確
認でき、しかも周波数特性には全く影響がなかった。The operation in this configuration is the same as in the case of FIG. reaches the O/E conversion element 14 of the light receiving end device 11 via the inter-device optical fiber 18 and the light receiving end optical fiber 15, where it is converted into an electrical signal and output.
As mentioned above, since an optical fiber having a larger core diameter than the inter-device optical fiber 18 is used as the receiving end optical fiber 15,
The connection loss at the connection between the two by the optical connector 17 is suppressed to a minimum.As a result, it was confirmed that the connection loss of the entire optical fiber transmission system was reduced by more than 1 dB on average compared to the conventional method, and the frequency characteristics had no effect at all.

尚、上述した実施例は、発光端装置１０と受光端装置１
１間の光フアイバ伝送経路として単に装置間光ファイバ
１８を使用したものであるが、本発明はこれに限定さ庇
るものではなく、例えば光スィッチ及び光分波器等の光
部品を用いた光フアイバ伝送経路におして、と扛らの光
部品が受光端装置１１の直前に用いらルるとき、その出
力側には入力側より太諭コア径をもつ光ファイバを用い
れば同様の効果が得ら几る〇 〔発明の効果〕 以上説明したように本発明は、受光端装置内で使用さｎ
る光ファイバを装置間の光フアイバ伝送経路に用いら几
る光ファイバより太いコア径としているため、両者の接
続部における接続損失を最小限に抑制することができ、
光フアイバ伝送系全体での接続損失を低減できるという
効果がある。Note that the above-mentioned embodiment includes the light emitting end device 10 and the light receiving end device 1.
Although the inter-device optical fiber 18 is simply used as an optical fiber transmission path between devices 1 and 1, the present invention is not limited to this. In an optical fiber transmission path, when an optical component is used immediately before the light receiving end device 11, the same effect can be obtained by using an optical fiber with a thicker core diameter on the output side than on the input side. [Effects of the Invention] As explained above, the present invention can
Since the optical fiber used for the optical fiber transmission route between the devices has a larger core diameter than the optical fiber used for the optical fiber transmission path between the devices, connection loss at the connection between the two can be minimized.
This has the effect of reducing connection loss in the entire optical fiber transmission system.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は一般的な光フアイバ伝送方式の基本構成１図、
第２図は光ファイバのコア径をパラメータとしたときの
軸ずｎ量と接続損失との関係を示すグラフ、第３図は本
発明による光フアイバ伝送方式の一実施例を示す基本構
成図である。 １．１０・・・発光端装置　２，１１・・・受光端装置
３．１２・・・Ｅ１０変換素子　４，１３・・・発光端
光ファイバ　５，１４・・・Ｏ／Ｅ変換素子　６．１５
・・・受光端光ファイバ　７，８，１６．１７・・・光
コネクタ　９．１８・・・装置間光ファイバ７一 手続補正書（自発） 昭和５９年６月２９日 特許庁長官　志　賀　学　殿 １、事件の表示 昭和５９年　特　許　願　第　０２０００７　号２、発
明の名称　光フアイバ伝送方式 ３、補正をする者 事件との関係　特許出願人 住　所　東京都港区虎ノ門１丁目７番１２号名　称　（
０２９）沖電気工業株式会社代表者　橋本南海男 ４、代　理　人 ７、補正の内容 １、特許請求の範囲を下記の如く補正する。 「１４発光端装置と受光端装置との間に光ファイバ邑圭
工伝送経路を有する光フアイバ伝送方式において、受光
端装置に用いられる受光端光ファイバのコア径を光フア
イバ伝送経路における光ファイバのコア径よシ犬ロ径に
したことを特徴とする光フアイバ伝送方式。 ２　光フアイバ伝送経路が光スィッチ及び光分波器等の
光部品を含み、これらの光部品が受光端装置の直前にあ
るとき、出力側には入力側より口径の大きなコア径を持
つ光ファイバを用いることを特徴とする特許請求の範囲
第１項記載の光フアイバ伝送方式。」 ２６　明細書第３頁第７行に、「同一径」とあるのを「
同一コア径」と補正する。 ３、明細書第４頁第１行に、「太径」とあるのを「大口
径」と補正する。 ４、明細書第４頁第２行に、「とじて」とあるのを「及
び」と補正する。 ５　明細書第４頁第４行に、「発光端光ファイバと装置
間光ファイバ」とあるのを「装置間光ファイバと受光端
光ファイバ」と補正する。 ６、明細書第４頁第９行に、「第３図」とあるのを「第
２図」と補正する。 ７　明細書第４頁第１６行に、「使用して接続した」と
あるのを「使用した」と補正する０８　明細書第５頁第
９行に、「いるが、」とあるのを「いる０」と補正する
。 ９、明細書第７頁第１行、及び第６行に、「太い」とあ
るのを「大口径の」と補正する。 １０、明細書第７頁第１１行に、「第１図は一般的な」
とあるのを「第１図は従来の一般的な」と補正する。Figure 1 is a diagram of the basic configuration of a general optical fiber transmission system.
Fig. 2 is a graph showing the relationship between the axis misalignment (n) and splice loss when the core diameter of the optical fiber is used as a parameter, and Fig. 3 is a basic configuration diagram showing an embodiment of the optical fiber transmission system according to the present invention. be. 1.10... Light emitting end device 2, 11... Light receiving end device 3.12... E10 conversion element 4, 13... Light emitting end optical fiber 5, 14... O/E conversion element 6. 15
...Receiving end optical fiber 7,8,16.17...Optical connector 9.18...Optical fiber between devices 71 Procedural amendment (voluntary) June 29, 1980 Commissioner of the Patent Office Manabu Shiga 1. Indication of the case 1982 Patent Application No. 020007 2. Name of the invention Optical fiber transmission system 3. Person making the amendment Relationship to the case Patent applicant address 1-7-12 Toranomon, Minato-ku, Tokyo Name (
029) Oki Electric Industry Co., Ltd. Representative Nankai Hashimoto 4, Agent 7 Contents of amendment 1 The scope of the claims is amended as follows. 14 In an optical fiber transmission system that has an optical fiber transmission path between a light emitting end device and a light receiving end device, the core diameter of the light receiving end optical fiber used in the light receiving end device is defined as the diameter of the optical fiber in the optical fiber transmission path. An optical fiber transmission method characterized by having a diameter that is equal to or smaller than the core diameter. 2. The optical fiber transmission path includes optical components such as an optical switch and an optical demultiplexer, and these optical components are connected immediately before the light receiving end device. 26. The optical fiber transmission system according to claim 1, characterized in that in some cases, an optical fiber having a larger core diameter is used on the output side than on the input side.'' 26 Page 3, line 7 of the specification. , replace "same diameter" with "
Correct as "same core diameter." 3. In the first line of page 4 of the specification, the phrase "large diameter" is corrected to "large diameter." 4. In the second line of page 4 of the specification, the word "tojite" is amended to read "and". 5. In the fourth line of page 4 of the specification, the phrase "the optical fiber at the light emitting end and the optical fiber between devices" is corrected to "the optical fiber between devices and the optical fiber at the light receiving end." 6. On page 4, line 9 of the specification, "Figure 3" is corrected to "Figure 2." 7 In the 4th page, line 16 of the specification, the phrase ``used and connected'' was amended to ``used.'' 08 In the 5th page, line 9 of the specification, the phrase ``Iruga,'' was changed to `` Correct it as "0". 9. In the first and sixth lines of page 7 of the specification, the word "thick" is corrected to "large diameter." 10. On page 7, line 11 of the specification, “Figure 1 is general.”
The statement "Figure 1 is conventional and general" is corrected.

Claims (1)

【特許請求の範囲】 １、発光端装置と受光端装置との間に光フアイバ伝送経
路を有する光フアイバ伝送方式において、受光端装置に
用いら几る受光端光ファイバのコア径を光フアイバ伝送
経路における光ファイバのコア径より太くしたことを特
徴とする光フアイバ伝送方式。 ２、光フアイバ伝送経路が光スィッチ及び光分波器等の
光部品を含み、こｎらの光部品が発光端装置の直前にあ
るとき、出力側には入力側より太いコア径を持つ光ファ
イバを用いることを特徴とする特許請求の範囲第１項記
載の光フアイバ伝送方式。[Claims] 1. In an optical fiber transmission system having an optical fiber transmission path between a light-emitting end device and a light-receiving end device, the core diameter of the light-receiving end optical fiber used in the light-receiving end device is defined as the optical fiber transmission method. An optical fiber transmission system characterized by having a core diameter larger than that of the optical fiber in the path. 2. When the optical fiber transmission path includes optical components such as an optical switch and an optical demultiplexer, and these optical components are located immediately before the light emitting end device, the output side has a larger core diameter than the input side. The optical fiber transmission system according to claim 1, characterized in that a fiber is used.
JP59020007A 1984-02-08 1984-02-08 Optical fiber transmitting system Pending JPS60164706A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP59020007A JPS60164706A (en) 1984-02-08 1984-02-08 Optical fiber transmitting system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP59020007A JPS60164706A (en) 1984-02-08 1984-02-08 Optical fiber transmitting system

Publications (1)

Publication Number Publication Date
JPS60164706A true JPS60164706A (en) 1985-08-27

Family

ID=12015064

Family Applications (1)

Application Number Title Priority Date Filing Date
JP59020007A Pending JPS60164706A (en) 1984-02-08 1984-02-08 Optical fiber transmitting system

Country Status (1)

Country Link
JP (1) JPS60164706A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01112271A (en) * 1987-07-04 1989-04-28 Ricoh Co Ltd Optical scanner for laser printer or the like
JPH0420256U (en) * 1990-06-11 1992-02-20

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01112271A (en) * 1987-07-04 1989-04-28 Ricoh Co Ltd Optical scanner for laser printer or the like
JPH0420256U (en) * 1990-06-11 1992-02-20

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