JPS62168436A - Optical transmission equipment - Google Patents
Optical transmission equipmentInfo
- Publication number
- JPS62168436A JPS62168436A JP60298163A JP29816385A JPS62168436A JP S62168436 A JPS62168436 A JP S62168436A JP 60298163 A JP60298163 A JP 60298163A JP 29816385 A JP29816385 A JP 29816385A JP S62168436 A JPS62168436 A JP S62168436A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- electrical
- converters
- signal
- signals
- 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
- 230000005540 biological transmission Effects 0.000 title claims abstract description 25
- 230000003287 optical effect Effects 0.000 title claims description 66
- 230000031700 light absorption Effects 0.000 abstract 1
- 239000013307 optical fiber Substances 0.000 description 26
- 239000000126 substance Substances 0.000 description 6
- 230000008054 signal transmission Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000644 propagated effect Effects 0.000 description 1
Landscapes
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
産業上の利用分野
この発明は、オンオフ信号あるいはデジタル信号などの
入力電気信号を光強度変換して伝送する光伝送装置に関
する。DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application This invention relates to an optical transmission device that converts the optical intensity of an input electrical signal such as an on/off signal or a digital signal and transmits the converted signal.
従来の技術
オンオフ信号あるいはデジタル信号などの入力電気信号
を光強度変換して光ファイバあるいは空間中に伝送し、
これを受信して再び電気信号に変換する光伝送装置にお
いて、送信側の電気／光（Ｅｌｏ）変換部あるいは受信
側の光／電気（０／Ｅ）変換部に故障が発生すると、こ
の光伝送装置は全面的に動作不能となる。Conventional technology Input electrical signals such as on/off signals or digital signals are converted into optical intensity and transmitted through optical fibers or into space.
In an optical transmission device that receives this signal and converts it back into an electrical signal, if a failure occurs in the electrical/optical (Elo) converter on the transmitting side or the optical/electrical (0/E) converter on the receiver side, the optical transmission The device becomes completely inoperable.
そこで、従来では、冗長多重化による信頼性向」二の手
法を用い、電気／光変換器と光／電気変換器の組を多数
組設けて伝送チャンネルを多くするようにしている。Therefore, conventionally, the second method of improving reliability through redundant multiplexing is used, and a large number of sets of electrical/optical converters and optical/electrical converters are provided to increase the number of transmission channels.
発明が解決しようとする問題点
しかしながら、従来の単なる冗長多重の場合、伝送路と
して光ファイバを用いるものでは、その光フアイバ伝送
路を多重化数だけ敷設する必要がある。また１通常の大
気中に光を伝送するものでは、多重化したとしても、光
波長が同一であるならば、大気中の水法気、ガス、塵埃
等の影響が各チャンネルに等しく及び、各チャンネルで
同じに伝送路妨害を受けるので、多重化した意味が失わ
れることにもなりかねない。Problems to be Solved by the Invention However, in the case of conventional simple redundant multiplexing, in which optical fibers are used as transmission lines, it is necessary to install as many optical fiber transmission lines as the number of multiplexed optical fibers. In addition, 1. In a device that transmits light into the atmosphere, even if it is multiplexed, if the wavelength of the light is the same, the influence of water, gas, dust, etc. in the atmosphere will be equally affected by each channel, and each channel will be affected equally. Since both channels are subject to transmission path interference, the meaning of multiplexing may be lost.
この発明は、光フアイバ伝送路を用いる場合は伝送路自
体は複線化する必要がなくて安価とすることができ、大
気中を伝送する場合は大気中の物質による妨害を各チャ
ンネルで同じに受けないようにすることで信頼性を高め
ることができる、光伝送装置を提供することを目的とす
る。In this invention, when an optical fiber transmission line is used, the transmission line itself does not need to be double-wired and can be made inexpensive, and when transmitting through the atmosphere, each channel receives the same interference from substances in the atmosphere. It is an object of the present invention to provide an optical transmission device that can improve reliability by preventing such occurrences.
問題点を解決するための手段
この発明に係る光伝送装置によれば、送信側において、
入力電気信号を光信号に変換する電気／光変換器を複数
個設けてこれらの光信号の波長を互いに異ならしめ、こ
れら複数個の電気／光変換器に同一入力電気信号を与え
て得られる複数波長の光信号を送り出し、受信側では、
各波長の光信号をそれぞれ電気信号に変換する複数個の
光／電気変換器を備え、これら光／゛屯気気変換器各々
に１−記の送られた複数波長の光信号のそれぞれを入射
して、各光／電気変換器により電気信号を得るようにし
ている。Means for Solving the Problems According to the optical transmission device according to the present invention, on the transmitting side,
A plurality of electrical/optical converters that convert an input electrical signal into an optical signal are provided, and the wavelengths of these optical signals are made to be different from each other. Sends out an optical signal of the same wavelength, and on the receiving side,
It is equipped with a plurality of optical/electrical converters that convert optical signals of each wavelength into electrical signals, and inputs each of the optical signals of the plurality of wavelengths sent to each of these optical/electrical converters. Then, each optical/electrical converter obtains an electrical signal.
作 用
同−入力電気信号を波長多重化した複数の光信号として
送り出すので、大気を伝送路とした場合は、大気中の水
蒸気、ガス、塵埃等の影響による光の散乱吸収特性が波
長によって異なることがら、これらの影響が各チャンネ
ル毎に異なって現われ、信頼性が向上する。Function: The input electrical signal is wavelength-multiplexed and sent out as multiple optical signals, so if the atmosphere is used as a transmission path, the scattering and absorption characteristics of light will vary depending on the wavelength due to the effects of water vapor, gas, dust, etc. in the atmosphere. Therefore, these effects appear differently for each channel, improving reliability.
また、伝送路として光ファイバを用いる場合、波長の異
なる複数の光信号を光合波器で合波して１本の光ファイ
バに送り込み、受信側では、この１本の光ファイバの出
射光を光分波器で分波することによって各波長の光信号
に分け、これらの各々を光／電気変換器に受光させる構
成をとることによって、光フアイバ伝送路としては１本
のものでよくなり、伝送路のコストダウンを図ることが
できる。しかも、この場合、光フアイバ伝送路を１木に
しても１合波器、分波器および光ファイバのような受動
的な光学素子は、電子部品や電気／光変換器、光／電気
変換器などに比較して信頼性がきわめて高いので、全体
としてきわめて信頼性が高く、複数本の光ファイバを用
いた場合に比べて信頼性が落ることがない。結果として
、低コストで高い信頼性を得ることができる。Furthermore, when using an optical fiber as a transmission line, multiple optical signals with different wavelengths are combined by an optical multiplexer and sent into a single optical fiber, and on the receiving side, the output light of this single optical fiber is By demultiplexing the optical signals with a demultiplexer and separating them into optical signals of each wavelength, each of which is received by an optical/electrical converter, only one optical fiber transmission line is required. It is possible to reduce the cost of roads. Moreover, in this case, even if the optical fiber transmission line is one tree, passive optical elements such as a multiplexer, a demultiplexer, and an optical fiber cannot be connected to electronic components, electrical/optical converters, or optical/electrical converters. Since the reliability is extremely high compared to other optical fibers, the reliability is extremely high as a whole, and the reliability does not deteriorate compared to when multiple optical fibers are used. As a result, high reliability can be obtained at low cost.
実施例
第１図は伝送路として光ファイバを用いる第４の実施例
を示す、この図において、送信側では、送られてきた電
気的な入力信号がインターフェイス１を介して複数個の
電気／光変換器２に入力される。これら複数個の電気／
光変換器２は、互いに異なる波長の光信号を発生し、入
力信号によって光強度変調された光信号が出力される。Embodiment FIG. 1 shows a fourth embodiment in which an optical fiber is used as a transmission path. It is input to converter 2. These multiple electricity/
The optical converter 2 generates optical signals of different wavelengths, and outputs optical signals whose optical intensity is modulated by the input signal.
これらの波長の異なる光信号は光ファイバ３によって光
合波器４に導かれ、各光信号が合波され、１本の光ファ
イバ５の一端に入射される。These optical signals having different wavelengths are guided to an optical multiplexer 4 by an optical fiber 3, where each optical signal is multiplexed and input into one end of a single optical fiber 5.
この光ファイバ５は長距離の伝送路をなすもので、受信
側の一端よりこの光フアイバ５中を伝搬した光が出射す
る。この出射光は、光分波器６により波長毎に分波され
、波長の異なる各光信号が分離される。この分離された
各波長の光信号は、それぞれ光ファイバ７を介して複数
個の光／電気変換器８に送られて、電気信号に変換され
、この電気信号はＯＲ回路９を通して出力される。した
がって、電気／光変換器２のいずれか、あるいは光／電
気変換器８のいずれかが故障してそのチャンネルでの信
号伝送が不可能な場合でも、健全なチャンネルが１つで
も残っていれば、信号伝送は確保され、信頼性が高まる
。また、これら複数個の光／電気変換器８の各出力はモ
ニタ装置１０に送られて、ここで各信号の一致が検出さ
れるようになっており、各信号の一致が検出されなくな
ったときは、いずれかのチャンネルが故障であるとｒｌ
Ｉ定できる。This optical fiber 5 forms a long-distance transmission path, and the light propagated through the optical fiber 5 is emitted from one end on the receiving side. This emitted light is demultiplexed into wavelengths by an optical demultiplexer 6, and optical signals with different wavelengths are separated. The separated optical signals of each wavelength are sent to a plurality of optical/electrical converters 8 via optical fibers 7 and converted into electrical signals, which are outputted through an OR circuit 9. Therefore, even if either the electrical/optical converter 2 or the optical/electrical converter 8 fails and signal transmission is impossible on that channel, as long as there is at least one healthy channel remaining. , signal transmission is ensured and reliability is increased. Further, each output of the plurality of optical/electrical converters 8 is sent to a monitor device 10, where the coincidence of each signal is detected, and when the coincidence of each signal is no longer detected, If any channel is faulty, rl
I can determine.
特にこの場合、光合波器４や、光分波器７、あるいは光
ファイバ３．５．７が受動的な光学素子であって、その
信頼性がきわめて高いため、故障を起すのは電気／光変
換器２や光／電気変換器８などの電子回路であるが、こ
の電気／光変換器２や光／電気変換器８は複数個設けら
れて多重化されているため、全体の信頼性が向上してい
る。そして、光ファイバ５は１本ですむため、特に長距
離伝送時に光ファイバの敷設コストの低減に寄与できる
。Particularly in this case, the optical multiplexer 4, optical demultiplexer 7, or optical fiber 3.5.7 are passive optical elements, and their reliability is extremely high. The electronic circuits include the converter 2 and the optical/electrical converter 8, but since a plurality of the electrical/optical converters 2 and optical/electrical converters 8 are provided and multiplexed, the overall reliability is low. It's improving. Since only one optical fiber 5 is required, it can contribute to reducing the cost of installing optical fibers, especially during long-distance transmission.
第２図は第２の実施例を示す、この図の実施例では、伝
送路として光ファイバを用いるのでなく、大気を用い、
送信側の複数個の電気／光変換器２かもの複数本の光ビ
ームが大気中を伝搬して受信側の複数個の光／電気変換
器８の各々に入射するようになっている。これら複数個
の光／電気変換器８の各信号がＯＲ回路９およびモニタ
装置１０に送られる点は第１図と同様である。FIG. 2 shows a second embodiment. In the embodiment shown in this figure, the atmosphere is used instead of an optical fiber as a transmission path.
A plurality of light beams from the plurality of electric/optical converters 2 on the transmitting side propagate through the atmosphere and are made incident on each of the plurality of optical/electrical converters 8 on the receiving side. Similar to FIG. 1, each signal from the plurality of optical/electrical converters 8 is sent to an OR circuit 9 and a monitor device 10.
この第２図で、各光ビームは波長が異なるので、大気中
の物質による散乱、吸収などの影響が異なる形で及ぶ、
そこで、大気中の物質の組成変動があっても、どれかの
波長の光ビームによる信号伝送が確保されることになる
。In Figure 2, each light beam has a different wavelength, so it is affected by scattering, absorption, etc. by substances in the atmosphere in different ways.
Therefore, even if there is a change in the composition of substances in the atmosphere, signal transmission using a light beam of any wavelength can be ensured.
なお、第２図の構成の場合、大気中のみならず、種々の
化学物質の存在する空間の場合でも、しかもその化学物
質の組成が変動したとしても、安定な信号伝送が可能と
なる。In the case of the configuration shown in FIG. 2, stable signal transmission is possible not only in the atmosphere but also in spaces where various chemical substances exist, and even if the composition of the chemical substances changes.
発明の効果
この発明によれば、光フアイバ伝送路を用いる場合は伝
送路自体は複数設ける必要がなくて敷設コストを低減し
ながら、信頼性を向上させることができる。また、大気
中を伝送する場合は大気中の物質による妨害を各チャン
ネルで同じに受けないようにすることで信頼性を高める
ことができる。Effects of the Invention According to the present invention, when an optical fiber transmission line is used, there is no need to provide a plurality of transmission lines, and reliability can be improved while reducing installation cost. In addition, when transmitting through the atmosphere, reliability can be improved by preventing each channel from receiving the same interference from atmospheric substances.
第１図はこの発明の一実施例のブロック図、第２図は他
の実施例のブロック図である。
ｌ・・・インターフェイス ２・・・電気／光変換器３
．７・・・光ファイバ ４・・・光合波器５・・・光
フアイバ伝送路 ６・・・光分波器８・・・光／電気変
換器 ９・・・ＯＲ回路ｉｏ・・・モニタ装置FIG. 1 is a block diagram of one embodiment of the invention, and FIG. 2 is a block diagram of another embodiment. l...Interface 2...Electrical/optical converter 3
．． 7... Optical fiber 4... Optical multiplexer 5... Optical fiber transmission line 6... Optical demultiplexer 8... Optical/electrical converter 9... OR circuit io... Monitor device
Claims (1)
る電気／光変換器を複数個設けてこれらの光信号の波長
を互いに異ならしめ、これら複数個の電気／光変換器に
同一入力電気信号を与えて得られる複数波長の光信号を
送り出し、受信側では、各波長の光信号をそれぞれ電気
信号に変換する複数個の光／電気変換器を備え、これら
光／電気変換器の各々に上記の送られた複数波長の光信
号のそれぞれを入射して、各光／電気変換器により電気
信号を得るようにした光伝送装置。(1) On the transmitting side, multiple electrical/optical converters are provided to convert input electrical signals into optical signals, and the wavelengths of these optical signals are made to differ from each other. The receiving side is equipped with a plurality of optical/electrical converters that convert the optical signals of each wavelength into electrical signals, and each of these optical/electrical converters has a An optical transmission device that receives each of the transmitted optical signals of a plurality of wavelengths and obtains an electrical signal by each optical/electrical converter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60298163A JPS62168436A (en) | 1985-12-31 | 1985-12-31 | Optical transmission equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60298163A JPS62168436A (en) | 1985-12-31 | 1985-12-31 | Optical transmission equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62168436A true JPS62168436A (en) | 1987-07-24 |
Family
ID=17856011
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60298163A Pending JPS62168436A (en) | 1985-12-31 | 1985-12-31 | Optical transmission equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62168436A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5278688A (en) * | 1990-04-24 | 1994-01-11 | Ortel Corporation | Fault tolerant fiber optic transmission system |
| WO2004047341A1 (en) * | 2002-11-19 | 2004-06-03 | Fujitsu Limited | Transmission apparatus and transmission apparatus path selection method |
| JP2010154064A (en) * | 2008-12-24 | 2010-07-08 | Nippon Telegr & Teleph Corp <Ntt> | Optical transmission system and optical transmission method |
| JP2015226252A (en) * | 2014-05-29 | 2015-12-14 | Ｎｅｃエンジニアリング株式会社 | Radio communication system, radio communication method and radio communication program |
-
1985
- 1985-12-31 JP JP60298163A patent/JPS62168436A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5278688A (en) * | 1990-04-24 | 1994-01-11 | Ortel Corporation | Fault tolerant fiber optic transmission system |
| WO2004047341A1 (en) * | 2002-11-19 | 2004-06-03 | Fujitsu Limited | Transmission apparatus and transmission apparatus path selection method |
| US7400829B2 (en) | 2002-11-19 | 2008-07-15 | Fujitsu Limited | Transmission apparatus and path selection method of a transmission apparatus |
| JP2010154064A (en) * | 2008-12-24 | 2010-07-08 | Nippon Telegr & Teleph Corp <Ntt> | Optical transmission system and optical transmission method |
| JP2015226252A (en) * | 2014-05-29 | 2015-12-14 | Ｎｅｃエンジニアリング株式会社 | Radio communication system, radio communication method and radio communication program |
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