JPH0148705B2 - - Google Patents
Info
- Publication number
- JPH0148705B2 JPH0148705B2 JP57050024A JP5002482A JPH0148705B2 JP H0148705 B2 JPH0148705 B2 JP H0148705B2 JP 57050024 A JP57050024 A JP 57050024A JP 5002482 A JP5002482 A JP 5002482A JP H0148705 B2 JPH0148705 B2 JP H0148705B2
- Authority
- JP
- Japan
- Prior art keywords
- light source
- circuit
- optical
- repeater
- transmission line
- 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 29
- 230000005540 biological transmission Effects 0.000 claims description 18
- 238000011144 upstream manufacturing Methods 0.000 claims description 6
- 230000005856 abnormality Effects 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims 3
- 230000002159 abnormal effect Effects 0.000 claims 2
- 230000008878 coupling Effects 0.000 claims 2
- 238000010168 coupling process Methods 0.000 claims 2
- 238000005859 coupling reaction Methods 0.000 claims 2
- 239000013307 optical fiber Substances 0.000 description 18
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000004065 semiconductor Substances 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】
（技術分野）
本発明は光フアイバ伝送系における光源冗長方
式に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to a light source redundancy system in an optical fiber transmission system.
（背景技術）
長距離光海底ケーブルシステムにおいては、中
継器が深海底に設置されるため、一旦中継器に障
害が生じると、修理経費および修理のための所要
日数が大となることから、中継器当りの信頼度を
陸上システムと比較して、非常に高く設計してい
る。光海底ケーブルシステムにおいては、光信号
を送出するための光源（LEDあるいは半導体レ
ーザ）の信頼度は中継器内に使用される電気回路
部品に比べて低い現状にあるため、長距離光海底
ケーブルシステムに必要な中継器の信頼度目標値
を達成できない。そこで複数の光源を冗長構成
し、動作中の光源に障害が生じた際に、予備光源
へ切替えることにより、中継器の信頼度改善を行
なう方式が特願昭54−69968等で提案されている。
しかしながら、特願昭54−69968等では予備光源
が上り中継器と下り中継器で独立に設置されてい
るため、上り中継器の予備光源がすべて故障した
場合、かつ下り中継器に正常動作する予備光源が
存在する場合においては、下り中継器の予備光源
が有効に活用されないという欠点があつた。(Background technology) In long-distance optical submarine cable systems, repeaters are installed on the deep seabed, so if a repeater fails, repair costs and the number of days required for repair will be large. The system is designed to have extremely high reliability per device compared to land-based systems. In optical submarine cable systems, the reliability of the light source (LED or semiconductor laser) for transmitting optical signals is currently lower than that of the electrical circuit components used in repeaters, so long-distance optical submarine cable systems are Unable to achieve repeater reliability target values required for Therefore, a method has been proposed in Japanese Patent Application No. 1987-69968, etc., in which multiple light sources are configured redundantly and the reliability of the repeater is improved by switching to a backup light source when a failure occurs in the operating light source. .
However, in Japanese Patent Application No. 54-69968, etc., backup light sources are installed independently in the uplink repeater and the downlink repeater, so if all the backup light sources in the uplink repeater fail, and the downlink repeater has a normally operating backup light source, When a light source is present, there is a drawback that the backup light source of the downlink repeater is not effectively utilized.
（発明の課題）
本発明は上記の欠点を解決することを目的と
し、なされたもので、その特徴は予備光源を上り
中継器と下り中継器で共有し、電気スイツチ回路
と光スイツチ回路により、動作中の光源に障害が
生じた際に、予備光源に切換え動作させ、上り方
向および下り方向のいずれの伝送路にも結合可能
とすることにより、予備光源を有効に活用し、中
継器の信頼度の改善をはかるものである。(Problems to be solved by the invention) The present invention was made with the aim of solving the above-mentioned drawbacks, and its characteristics are that the backup light source is shared by the uplink repeater and the downlink repeater, and the electric switch circuit and the optical switch circuit are used. When a failure occurs in the operating light source, the backup light source can be activated and connected to either the upstream or downstream transmission path, making effective use of the backup light source and increasing the reliability of the repeater. This aims to improve the level of performance.
（発明の構成および作用）
第１図は本発明の一実施例を示す図であり、予
備光源２個を上りおよび下り中継器で共有する光
源の冗長方式の例である。図中１および２は上り
および下り中継器の識別回路、３は識別回路１の
出力を光源駆動回路５，６，７に切替えるための
切替回路、また４は識別回路２の出力を光源駆動
回路６，７，８に切替えるための切替回路であ
る。さらに９，１１，１３，１５は光源で１０，
１２，１４，１６は光源のバイアス電流等により
光源の状態をモニタする光源モニタ回路である。
１７は３，４の切替回路を制御するための切替制
御回路、１９は光交叉回路、２０，２１は光合波
器、１８は光交叉回路駆動回路、f1〜f6は光フア
イバ、f7は上りの光フアイバ伝送路、f8は下りの
光フアイバ伝送路である。なお、第１図でAPC
回路は省略してある。以下動作原理を説明する。(Structure and Operation of the Invention) FIG. 1 is a diagram showing an embodiment of the present invention, and is an example of a light source redundancy system in which two standby light sources are shared by uplink and downlink repeaters. In the figure, 1 and 2 are identification circuits for uplink and downlink repeaters, 3 is a switching circuit for switching the output of identification circuit 1 to light source drive circuits 5, 6, and 7, and 4 is a light source drive circuit for switching the output of identification circuit 2 to light source drive circuits. This is a switching circuit for switching to 6, 7, and 8. Furthermore, 9, 11, 13, 15 are light sources 10,
Reference numerals 12, 14, and 16 are light source monitor circuits that monitor the state of the light source using a bias current of the light source or the like.
17 is a switching control circuit for controlling the switching circuits 3 and 4, 19 is an optical crossover circuit, 20 and 21 are optical multiplexers, 18 is an optical crossover circuit driving circuit, f 1 to f 6 are optical fibers, and f 7 is the upstream optical fiber transmission line, and f8 is the downstream optical fiber transmission line. In addition, in Figure 1, APC
The circuit is omitted. The operating principle will be explained below.
まず初期状態では、上り中継器の光源９と下り
中継器の光源１５が動作中で、それぞれの光出力
は上りの光フアイバ伝送路f7と下りの光フアイバ
伝送路f8に結合されている。もし光源９に障害が
生じ、そのバイアス電流が増加し、規準値を越え
ると、光源モニタ回路１０には出力ａがあらわれ
１７の切替制御回路に入力されると、切替制御信
号ｅにより、３の切替回路が動作し、光源駆動回
路５から光源駆動回路６に切替えられ、光源１１
を駆動する。この時、光交叉回路１９は光フアイ
バf2からの入力はf5に、光フアイバf3からの入力
はf6に結合されているため、光源１１の光出力は
光合波器２０を通過し、上りの光フアイバ伝送路
f7に送出される。さらに光源１１に障害が生じた
場合は、光源モニタ回路１２の出力ｂにより光源
１３が上り中継器の識別回路１の出力信号で駆動
され、１７の切替制御回路の出力ｇにより光交叉
回路駆動回路１８が動作し、光交叉回路１９が駆
動され、光フアイバf2の入力はf6に、光フアイバ
f3の入力はf5に結合されるため、前述と同様に上
りの光フアイバ伝送路f7に送出される。上述の説
明では光源９→１１→１３の切替えについて説明
したが、光源１５→１３→１１の切替えについて
も全く同じ過程で説明される。 First, in the initial state, the light source 9 of the uplink repeater and the light source 15 of the downlink repeater are in operation, and their respective optical outputs are coupled to the uplink optical fiber transmission line f7 and the downlink optical fiber transmission line f8 . . If a failure occurs in the light source 9 and its bias current increases and exceeds the standard value, an output a appears in the light source monitor circuit 10 and is input to the switching control circuit 17. The switching circuit operates, and the light source drive circuit 5 is switched to the light source drive circuit 6, and the light source 11 is switched to the light source drive circuit 6.
to drive. At this time, since the optical crossover circuit 19 has the input from the optical fiber f 2 coupled to f 5 and the input from the optical fiber f 3 to f 6 , the optical output of the light source 11 passes through the optical multiplexer 20. , upstream optical fiber transmission line
Sent on f 7 . Furthermore, if a failure occurs in the light source 11, the light source 13 is driven by the output signal of the identification circuit 1 of the uplink repeater by the output b of the light source monitor circuit 12, and the output g of the switching control circuit 17 drives the light source 13 by the output signal from the switching control circuit 17. 18 is activated, the optical crossover circuit 19 is driven, and the input of the optical fiber f2 is connected to the input of the optical fiber f6 .
Since the input of f3 is coupled to f5 , it is sent to the upstream optical fiber transmission line f7 in the same manner as described above. In the above description, the switching of the light sources 9→11→13 has been explained, but the switching of the light sources 15→13→11 will also be explained using the same process.
第２図は第１図の切替制御回路１７と切替回路
３，４の詳細な構成例を示したものである。まず
切替制御回路１７に関し、２２〜２５はワンシヨ
ツト・マルチバイブレータ、２６〜２８はOR回
路であり、光源モニタ回路１０，１２，１４，１
６からの入力により一定時間幅の切替制御信号パ
ルスｅ，ｆをそれぞれ切替回路３，４に送出す
る。切替回路３，４において、２９，３０はシフ
トレジスタ回路、３１〜３６はAND回路で、前
述のパルスｅ，ｆが入力されるごとにAND回路
３１〜３３，34〜36が順次開いて、識別回路１，
２からの信号を光源駆動回路５〜８に切替えるも
のである。 FIG. 2 shows a detailed configuration example of the switching control circuit 17 and switching circuits 3 and 4 shown in FIG. First, regarding the switching control circuit 17, 22 to 25 are one-shot multivibrators, 26 to 28 are OR circuits, and the light source monitor circuits 10, 12, 14, 1
6 sends switching control signal pulses e and f of a constant time width to switching circuits 3 and 4, respectively. In the switching circuits 3 and 4, 29 and 30 are shift register circuits, and 31 to 36 are AND circuits, and each time the aforementioned pulses e and f are input, the AND circuits 31 to 33 and 34 to 36 are sequentially opened to perform identification. circuit 1,
2 to the light source drive circuits 5 to 8.
第３図は第１図で説明した光交叉回路１９の一
具体例を示す図である。同図において、３７〜４
０は集束性ロツドレンズ、４１はミラーである。
ミラーが挿入されている状態では光フアイバf2か
らの光入力はf5に光フアイバf3からの光入力はf6
に結合されるが、ミラーを除去することによりf2
→f6，f3→f5なる結合状態となり交叉回路が実現
されている。 FIG. 3 is a diagram showing a specific example of the optical crossover circuit 19 described in FIG. 1. In the same figure, 37-4
0 is a focusing rod lens, and 41 is a mirror.
With the mirror inserted, the light input from optical fiber f 2 is f 5 and the optical input from optical fiber f 3 is f 6
but by removing the mirror f 2
→f 6 , f 3 →f 5 are in the coupled state, and a crossover circuit is realized.
以上の説明では４個の光源の冗長構成の例につ
いて示したが他の個数の光源についても同様に構
成可能である。また光フアイバ１芯双方向伝送方
式についても適用可能なことは明白である。光源
の異常を同じ中継器内の光源モニタ回路で検知す
る場合について説明したが、他の中継器で光源の
異常を検知する場合についても同様の方式が適用
可能である。 In the above description, an example of a redundant configuration of four light sources has been described, but the configuration can be similarly configured for other numbers of light sources. It is obvious that the present invention can also be applied to a single optical fiber bidirectional transmission system. Although a case has been described in which an abnormality in a light source is detected by a light source monitor circuit in the same repeater, a similar method can be applied to a case in which an abnormality in a light source is detected by another repeater.
（発明の効果）
以上説明したように本発明によれば、光中継器
の光源冗長方式において、予備光源を上り中継器
と下り中継器で共有することにより、予備光源を
有効に活用でき、光中継器の高信頼度化、経済化
が期待され、長距離光海底ケーブルシステムに有
効である。(Effects of the Invention) As explained above, according to the present invention, in the light source redundancy system of an optical repeater, by sharing the standby light source between the uplink repeater and the downlink repeater, the standby light source can be effectively utilized and the light It is expected to make repeaters more reliable and economical, and will be effective in long-distance optical submarine cable systems.
第１図は本発明の一実施例による光源冗長方式
のブロツク図、第２図は第１図における切替制御
回路および切替回路の構成例、第３図は第１図に
おける光交叉回路の一具体例である。
１……上り中継器の識別回路、２……下り中継
器の識別回路、３，４……切替回路、５〜８……
光源駆動回路、９，１１，１３，１５……光源、
１０，１２，１４，１６……光源モニタ回路、１
７……切替制御回路、１８……光交叉回路駆動回
路、１９……光交叉回路、２０，２１……光合波
器、f1〜f6……光フアイバ、f7……上りの光フア
イバ伝送路、f8……下りの光フアイバ伝送路、２
２〜２５……ワンシヨツトマルチバイブレータ、
２６〜２８……OR回路、２９，３０……シフト
レジスタ回路、３１〜３６……AND回路。
FIG. 1 is a block diagram of a light source redundancy system according to an embodiment of the present invention, FIG. 2 is a configuration example of the switching control circuit and switching circuit in FIG. 1, and FIG. 3 is a specific example of the optical crossover circuit in FIG. This is an example. 1...Uplink repeater identification circuit, 2...Downlink repeater identification circuit, 3, 4...Switching circuit, 5-8...
Light source drive circuit, 9, 11, 13, 15... light source,
10, 12, 14, 16... light source monitor circuit, 1
7...Switching control circuit, 18...Optical crossover circuit drive circuit, 19...Optical crossover circuit, 20, 21...Optical multiplexer, f1 to f6 ...Optical fiber, f7 ... Upstream optical fiber Transmission line, f 8 ... Downward optical fiber transmission line, 2
2 to 25...One-shot multivibrator,
26-28...OR circuit, 29,30...shift register circuit, 31-36...AND circuit.
Claims (1)
器とを備えた光中継器の光源冗長方式において、
複数の光源と、該複数の光源の中から上り伝送路
用光中継器及び下り伝送路用光中継器の各々に単
一の光源を選択して動作させると共に光出力を上
り伝送路及び下り伝送路に各々結合する手段と、
動作中の光源を監視するモニタ手段と、モニタ手
段が異常を検出したとき当該異常光源を停止させ
ると共に前記複数の光源のうち予備となつている
光源を動作させる切替手段と、当該予備の光源の
光出力を前記異常光源が接続されていた光源に結
合する手段とを有し、予備の光源が上り及び下り
の伝送路に共用されることを特徴とする、光中継
器の光源冗長方式。1. In a light source redundancy system for an optical repeater equipped with an optical repeater for uplink transmission lines and an optical repeater for downlink transmission lines,
A plurality of light sources, a single light source selected from among the plurality of light sources for each of the optical repeater for the uplink transmission line and the optical repeater for the downlink transmission line are operated, and the optical output is transmitted to the uplink transmission line and the downlink transmission line. means for respectively coupling to the paths;
a monitoring means for monitoring an operating light source; a switching means for stopping the abnormal light source and operating a spare light source among the plurality of light sources when the monitoring means detects an abnormality; and a means for coupling optical output to a light source to which the abnormal light source was connected, and a redundant light source system for an optical repeater, characterized in that a spare light source is shared for upstream and downstream transmission lines.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57050024A JPS58168342A (en) | 1982-03-30 | 1982-03-30 | Light source redundancy system of optical repeater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP57050024A JPS58168342A (en) | 1982-03-30 | 1982-03-30 | Light source redundancy system of optical repeater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58168342A JPS58168342A (en) | 1983-10-04 |
| JPH0148705B2 true JPH0148705B2 (en) | 1989-10-20 |
Family
ID=12847424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP57050024A Granted JPS58168342A (en) | 1982-03-30 | 1982-03-30 | Light source redundancy system of optical repeater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58168342A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4581770A (en) * | 1983-12-19 | 1986-04-08 | Rca Corporation | Fail safe repeater for fiber optic bus distribution system |
| GB2165412B (en) * | 1984-10-05 | 1988-08-10 | Stc Plc | Improvements in optical transmission systems |
| FR2640101B1 (en) * | 1988-12-06 | 1991-01-11 | Cit Alcatel | DEVICE FOR CONNECTING OPTICAL LINES TO A BROADBAND TELECOMMUNICATION CENTER |
| FR2712757B1 (en) * | 1993-11-18 | 1995-12-29 | Cit Alcatel | Optical selector and optical link comprising this selector. |
| US20050191052A1 (en) * | 2004-02-26 | 2005-09-01 | Karl Schrodinger | Optical emission module |
-
1982
- 1982-03-30 JP JP57050024A patent/JPS58168342A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58168342A (en) | 1983-10-04 |
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