JPS6324575B2 - - Google Patents
Info
- Publication number
- JPS6324575B2 JPS6324575B2 JP55174389A JP17438980A JPS6324575B2 JP S6324575 B2 JPS6324575 B2 JP S6324575B2 JP 55174389 A JP55174389 A JP 55174389A JP 17438980 A JP17438980 A JP 17438980A JP S6324575 B2 JPS6324575 B2 JP S6324575B2
- Authority
- JP
- Japan
- Prior art keywords
- optical
- electrical
- coupler
- conversion circuit
- conversion circuits
- 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.)
- Expired
Links
- 230000003287 optical effect Effects 0.000 claims description 58
- 238000006243 chemical reaction Methods 0.000 claims description 28
- 230000005540 biological transmission Effects 0.000 claims description 19
- 238000005315 distribution function Methods 0.000 claims 1
- 239000013307 optical fiber Substances 0.000 description 7
- 239000000835 fiber Substances 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
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
- H04B10/03—Arrangements for fault recovery
- H04B10/032—Arrangements for fault recovery using working and protection systems
Description
【発明の詳細な説明】
本発明は高信頼性を要求される光伝送装置に関
するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an optical transmission device that requires high reliability.
長距離光フアイバケーブル通信、特に光フアイ
バケーブルを海底に敷設する場合には、障害復旧
に多大な労力を要するため、光伝送装置に高い信
頼性が要求される。そのため、従来から光―電気
変換回路、電気―光変換回路、光伝送路を二重化
することが行われている。第１図は従来の二重化
光伝送装置の一構成例である。本図において、１
は光中継器、２―１〜２―３，２′―１〜２′―３
は光フアイバケーブル、３，３′，５，５′は光―
電気変換回路、４，４′，６，６′は電気―光変換
回路、７は信号合成器、８は信号処理部、９は信
号分配器である。 BACKGROUND ART In long-distance optical fiber cable communications, especially when optical fiber cables are laid under the sea, a great deal of effort is required to recover from failures, so optical transmission equipment is required to have high reliability. For this reason, optical-to-electric conversion circuits, electric-to-optical conversion circuits, and optical transmission lines have been duplicated. FIG. 1 shows an example of the configuration of a conventional duplex optical transmission device. In this figure, 1
is an optical repeater, 2-1 to 2-3, 2'-1 to 2'-3
is fiber optic cable, 3, 3', 5, 5' is optical fiber cable.
Reference numerals 4, 4', 6, and 6' are electrical-to-optical conversion circuits, 7 is a signal combiner, 8 is a signal processing section, and 9 is a signal distributor.
本図に示す構成は、光―電気変換回路、電気―
光変換回路、光伝送路をそれぞれ二重化し信頼性
の向上をはかつたものである。このような二重化
構成をとることにより、一方の通信系統に障害が
発生しても他方の系統で通信が可能であるが、両
方の系統に障害が発生した場合、たとえば第１図
において×印の点で障害が発生すると通信不能と
なつてしまう。 The configuration shown in this figure consists of an optical-to-electrical conversion circuit, an electrical
The optical conversion circuit and optical transmission line are both duplicated to improve reliability. By adopting such a duplex configuration, even if a failure occurs in one communication system, communication is possible in the other system, but if a failure occurs in both systems, for example, the If a failure occurs at any point, communication becomes impossible.
本発明は上述の欠点を除去し、二重化構成の光
伝送装置の信頼性をさらに向上することを目的と
し、光伝送路、電気―光変換回路、光―電気変換
回路を二重化した光伝送装置において、２つの光
入力を合成し、合成した該光入力を２分岐して光
出力とする光カツプラを該光伝送路間の少なくと
も一カ所に挿入することを特徴とするものであ
る。 The present invention aims to eliminate the above-mentioned drawbacks and further improve the reliability of an optical transmission device with a duplex configuration. , an optical coupler that combines two optical inputs and branches the combined optical input into two to produce an optical output is inserted at at least one location between the optical transmission lines.
以下に図を用いて本発明を詳細に説明する。 The present invention will be explained in detail below using the figures.
第２図は本発明の一実施例、第３図は光カツプ
ラの構成で１はハーフミラーを用いた光カツプ
ラ、２は２本の光フアイバを熱融着した光カツプ
ラである。第２，３図において、１１は光カツプ
ラ、１２，１２′，１３，１３′はレンズ、１４は
ハーフミラー、１５は熱融着部である。なお両図
において第１図と同一番号は同一部位を示す。 FIG. 2 shows an embodiment of the present invention, and FIG. 3 shows the configuration of an optical coupler. 1 is an optical coupler using a half mirror, and 2 is an optical coupler in which two optical fibers are thermally fused. In FIGS. 2 and 3, 11 is an optical coupler, 12, 12', 13, and 13' are lenses, 14 is a half mirror, and 15 is a heat-sealing part. Note that in both figures, the same numbers as in FIG. 1 indicate the same parts.
本実施例は、電気―光変換回路４，４′の直後
に光カツプラ１０を挿入したものである。本実施
例において使用する光カツプラは第３図の如き構
造を持ち、第３図１はハーフミラーを用いた光カ
ツプラについて説明すると電気―光変換回路３の
光出力はレンズ１２に入力され、1/2はハーフミ
ラー１４で反射され、ハーフミラー１４に透過し
てきた電気―光変換回路３′の光出力と合成され
レンズ１３から出力される。レンズ１３′からは、
ハーフミラー１４を透過した電気―光変換回路３
の光出力と、ハーフミラー１４で反射された電気
―光変換回路３′の光出力が合成されて出力され
る。したがつて光カツプラでは２つの光入力が合
成され、合成された光信号を２分岐されることに
なる。また第３図２に示した２本の光フアイバを
熱融着した光カツプラも同様の機能を持つ。 In this embodiment, an optical coupler 10 is inserted immediately after the electro-optical conversion circuits 4, 4'. The optical coupler used in this embodiment has a structure as shown in FIG. 3. FIG. 3 1 shows an optical coupler using a half mirror. /2 is reflected by the half mirror 14, combined with the optical output of the electro-optical conversion circuit 3' that has passed through the half mirror 14, and output from the lens 13. From lens 13',
Electricity-optical conversion circuit 3 transmitted through half mirror 14
The optical output of the electric-to-optical conversion circuit 3' reflected by the half mirror 14 is combined and output. Therefore, the optical coupler combines two optical inputs and branches the combined optical signal into two. Furthermore, the optical coupler shown in FIG. 3, in which two optical fibers are thermally fused together, has a similar function.
以上のような機能を持つ光カツプラ１０を電気
―光変換回路４，４′の直後に挿入することによ
り、４種類の経路で光信号が伝送されることにな
る。すなわち、電気―光変換回路→光カツプラ１
０→光伝送路２―１→光―電気変換回路５又は光
伝送路２′―１→光―電気変換回路５′、電気―光
変換回路４′→光カツプラ１０→光伝送路２―１
→光―電気変換回路５又は光伝送路２′―１→光
―電気変換回路５′の４経路で光信号は伝送され
る。したがつて第１図において示した障害が発生
しても電気―光変換回路４′→光カツプラ１０→
光伝送路２―１→光―電気変換回路５の経路で光
信号が伝送されるので通信不能となることはな
い。 By inserting the optical coupler 10 having the above-mentioned functions immediately after the electrical-optical conversion circuits 4, 4', optical signals can be transmitted through four types of paths. In other words, electrical-optical conversion circuit → optical coupler 1
0 → Optical transmission line 2-1 → Optical-electrical conversion circuit 5 or optical transmission line 2'-1 → Optical-electrical conversion circuit 5', electrical-optical conversion circuit 4' → Optical coupler 10 → Optical transmission line 2-1
The optical signal is transmitted through four paths: → optical-electrical conversion circuit 5 or optical transmission line 2'-1 → optical-electrical conversion circuit 5'. Therefore, even if the failure shown in FIG. 1 occurs, the electrical-to-optical conversion circuit 4'→optical coupler 10→
Since the optical signal is transmitted along the path from the optical transmission line 2-1 to the optical-to-electrical conversion circuit 5, there is no possibility that communication will become impossible.
なお本実施例においては、電気―光変換回路
４，４′の直後に光カツプラ１０を挿入したが、
光―電気変換回路５，５′の直前にも光カツプラ
を挿入することにより８通りの信号伝送経路がで
きるので、さらに信頼性が向上することになる
が、光―電気変換回路５，５′は、電気―光変換
回路４，４′に比べ故障率が低いので本実施例の
如く光カツプラ１０を電気―光変換回路４，４′
の直後に挿入するだけでも十分である。 In this embodiment, the optical coupler 10 is inserted immediately after the electrical-optical conversion circuits 4, 4';
By inserting an optical coupler just before the optical-to-electrical conversion circuits 5 and 5', eight signal transmission paths are created, further improving reliability. Since the failure rate is lower than that of the electric-to-optical conversion circuits 4 and 4', the optical coupler 10 is replaced with the electric-to-optical conversion circuits 4 and 4' as in this embodiment.
It is sufficient to insert it immediately after.
以上、、説明したように、本発明によれば、光
伝送路、光―電気変換回路、電気―光変換回路を
二重化した光伝送装置において、両系統に障害が
発生しても通信が可能であり信頼性がさらに向上
する。 As explained above, according to the present invention, communication is possible even if a failure occurs in both systems in an optical transmission device in which optical transmission lines, optical-to-electrical conversion circuits, and electric-to-optical conversion circuits are duplicated. Yes, reliability is further improved.
第１図は従来の二重化光伝送装置の一構成例、
第２図は本発明の一実施例、第３図は光カツプラ
の構造例、１はハーフミラーを用いた光カツプ
ラ、２は２本の光フアイバを熱融着した光カツプ
ラである。
１……光中継器、２―１〜２―３、２′―１〜
２′―３は光フアイバケーブル、３，３′，５，
５′……光―電気変換回路、４，４′，６，６′…
…電気―光変換回路、７，７′……信号合成器、
８，８′……信号処理部、９，９′……信号分配
器、１０，１１……光カツプラ、１２，１２′，
１３，１３′……レンズ、１４……ハーフミラー、
１５……熱融着部。
Figure 1 shows an example of the configuration of a conventional duplex optical transmission device.
FIG. 2 shows an embodiment of the present invention, and FIG. 3 shows an example of the structure of an optical coupler. 1 is an optical coupler using a half mirror, and 2 is an optical coupler in which two optical fibers are thermally fused. 1... Optical repeater, 2-1 to 2-3, 2'-1 to
2'-3 is an optical fiber cable, 3, 3', 5,
5'...Optical-electrical conversion circuit, 4, 4', 6, 6'...
...electrical-optical conversion circuit, 7,7'...signal combiner,
8, 8'...Signal processing unit, 9, 9'...Signal distributor, 10, 11...Optical coupler, 12, 12',
13, 13'...lens, 14...half mirror,
15... Heat fusion part.
Claims (1)
回路を二重化した光伝送装置において、２つの光
入力を合成し、合成した該光入力を２分岐して光
出力とする光カツプラを該光伝送路間の少なくと
も一カ所に挿入することを特徴とする光分配機能
を有する光伝送装置。1. In an optical transmission device with duplexed optical transmission lines, electric-to-optical conversion circuits, and optical-to-electrical conversion circuits, an optical coupler is used that combines two optical inputs and branches the combined optical input into two optical outputs. An optical transmission device having an optical distribution function, which is inserted at at least one location between optical transmission lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55174389A JPS5797741A (en) | 1980-12-10 | 1980-12-10 | Optical transmission device with light distributing function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP55174389A JPS5797741A (en) | 1980-12-10 | 1980-12-10 | Optical transmission device with light distributing function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5797741A JPS5797741A (en) | 1982-06-17 |
| JPS6324575B2 true JPS6324575B2 (en) | 1988-05-21 |
Family
ID=15977745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP55174389A Granted JPS5797741A (en) | 1980-12-10 | 1980-12-10 | Optical transmission device with light distributing function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5797741A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4878726A (en) * | 1988-11-10 | 1989-11-07 | American Telephone And Telegraph Company | Optical transmission system |
| US5113276A (en) * | 1989-11-09 | 1992-05-12 | Siemens Aktiengesellschaft | Optical communication network using redundant waveguides and two way operation |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5694850A (en) * | 1979-12-28 | 1981-07-31 | Fujitsu Ltd | Optical transmission system |
-
1980
- 1980-12-10 JP JP55174389A patent/JPS5797741A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5694850A (en) * | 1979-12-28 | 1981-07-31 | Fujitsu Ltd | Optical transmission system |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5797741A (en) | 1982-06-17 |
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