JPH0821895B2 - Optical signal transmission path inside satellite - Google Patents
Optical signal transmission path inside satelliteInfo
- Publication number
- JPH0821895B2 JPH0821895B2 JP5120025A JP12002593A JPH0821895B2 JP H0821895 B2 JPH0821895 B2 JP H0821895B2 JP 5120025 A JP5120025 A JP 5120025A JP 12002593 A JP12002593 A JP 12002593A JP H0821895 B2 JPH0821895 B2 JP H0821895B2
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical signal
- signal
- signal transmission
- 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 - Lifetime
Links
Landscapes
- Light Guides In General And Applications Therefor (AREA)
- Optical Communication System (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光信号伝送路に関し、
特に人工衛星内部での光信号伝送路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical signal transmission line,
In particular, it relates to an optical signal transmission path inside an artificial satellite.
【０００２】[0002]
【従来の技術】分散を低減する従来の光信号伝送路は、
図２に示すように、電気−光変換器２２と伝送用長尺光
ファイバケーブル２５との間に、光信号伝送路全体の分
散を制御するための所定の長さの分散補償用シングルモ
ード光ファイバ２３を挿入している（例えば特開昭６２
−６５５２９号公報）。この分散補償用シングルモード
光ファイバ２３を挿入することにより、光信号伝送路全
体の零分散波長を電気−光変換器２２の出力光の発光中
心波長と一致させ、分散を低減し、伝送容量を増大させ
ている。2. Description of the Related Art A conventional optical signal transmission line for reducing dispersion is
As shown in FIG. 2, a single mode light for dispersion compensation having a predetermined length for controlling the dispersion of the entire optical signal transmission line between the electro-optical converter 22 and the transmission long optical fiber cable 25. A fiber 23 is inserted (for example, Japanese Patent Laid-Open No. Sho 62-62).
-65529). By inserting this dispersion-compensating single-mode optical fiber 23, the zero-dispersion wavelength of the entire optical signal transmission line is made to coincide with the emission center wavelength of the output light of the electro-optical converter 22, dispersion is reduced, and transmission capacity is increased. Is increasing.
【０００３】なお図中、２１は入力電気信号端子、２４
は接続部、２６は光−電気変換器、２７は電気信号出力
端子である。In the figure, 21 is an input electric signal terminal, 24
Is a connection portion, 26 is an optical-electrical converter, and 27 is an electric signal output terminal.
【０００４】[0004]
【発明が解決しようとする課題】この従来の技術のシン
グルモード光ファイバを用いた光信号伝送路では、光パ
ルス信号を伝送する場合、人工衛星内部の熱環境によ
り、シングルモード光ファイバの形状が温度変化により
変化して、シングルモード光ファイバ内で偏波分散が生
じ、光パルス信号波形を変形させるため、正確な光パル
ス信号伝送をできないという問題点があった。In the optical signal transmission line using the single mode optical fiber of the prior art, when the optical pulse signal is transmitted, the shape of the single mode optical fiber is changed due to the thermal environment inside the artificial satellite. There is a problem that the optical pulse signal transmission cannot be performed accurately because the polarization dispersion occurs in the single mode optical fiber due to the change in temperature and the optical pulse signal waveform is deformed.
【０００５】本発明の目的は、このような問題点を解決
した人工衛星内部光信号伝送路を提供することにある。An object of the present invention is to provide an artificial satellite internal optical signal transmission line which solves the above problems.
【０００６】[0006]
【課題を解決するための手段】本発明の人工衛星内部光
信号伝送路は、光信号を２つに分波する分波器と、この
分波器に接続され、互い熱環境の異なる場所に計装した
２本のシングルモード光ファイバと、これら２本のシン
グルモード光ファイバを経てきた２つの光信号を受信
し、偏波分散の影響が少ない方の系を選択する手段と、
を備えることを特徴とする。The artificial satellite internal optical signal transmission line of the present invention is provided with a demultiplexer for demultiplexing an optical signal into two parts, and a demultiplexer connected to the demultiplexer so that they can be installed in different thermal environments. Two single-mode optical fibers that have been instrumented, and a means for receiving two optical signals that have passed through these two single-mode optical fibers and selecting a system having a smaller influence of polarization dispersion.
It is characterized by including.
【０００７】[0007]
【実施例】次に本発明の実施例について図面を参照して
説明する。Next, an embodiment of the present invention will be described with reference to the drawings.
【０００８】図１は、本発明の一実施例の人工衛星内部
光信号伝送路である。この伝送路は、光信号送信部（電
気−光信号変換部）１からの光信号を伝送するシングル
モード光ファイバ３と、このシングルモード光ファイバ
３に接続され、伝送されてくる光信号を２つに分波する
分波器２と、この分波器に接続され、互いに熱環境の異
なる場所に計装した同一長さの２本のシングルモード光
ファイバ４，５と、これら２本のシングルモード光ファ
イバを経てきた２つの光信号のそれぞれを受信し、電気
信号に変換する光信号受信部６，７（光−電気信号変換
部）と、これら光信号受信部の出力が入力される比較器
９と、この比較器へ基準信号を供給する基準信号発生器
８とから構成されている。FIG. 1 shows an artificial satellite internal optical signal transmission line according to an embodiment of the present invention. This transmission line connects a single mode optical fiber 3 for transmitting the optical signal from the optical signal transmitter (electrical-optical signal converter) 1 and an optical signal 2 connected to the single mode optical fiber 3 for transmission. Demultiplexer 2 for demultiplexing into two, two single mode optical fibers 4 and 5 of the same length, which are connected to this demultiplexer and are instrumented in different thermal environments, and these two single A comparison between the optical signal receiving units 6 and 7 (optical-electrical signal converting units) that receive each of the two optical signals that have passed through the mode optical fiber and convert them into electrical signals, and the outputs of these optical signal receiving units are input. And a reference signal generator 8 for supplying a reference signal to this comparator.
【０００９】シングルモード光ファイバ４，５は、人工
衛星内部で互いに熱環境の異なる場所を通るように計装
する。The single-mode optical fibers 4 and 5 are instrumented so as to pass through places where thermal environments are different from each other inside the artificial satellite.
【００１０】また比較器９は、光信号受信部６，７から
のそれぞれの出力を、基準信号発生器８からの基準信号
と比較して、基準信号に近いもの、すなわち偏波分散の
影響の少ないものを選択し、出力する。Further, the comparator 9 compares the respective outputs from the optical signal receiving units 6 and 7 with the reference signal from the reference signal generator 8 and compares them with the reference signal, that is, the influence of polarization dispersion. Select a small number and output.
【００１１】次に本実施例の動作を説明する。光信号送
信部１からシングルモード光ファイバ３を経て光パルス
信号を光パルス分波器２へ送り、光パルス信号を２分割
する。２分割された光パルス信号は、同じ長さである２
本のシングルモード光ファイバ４，５を経て、同じ特性
を持つ光信号受信部６，７へ送られる。Next, the operation of this embodiment will be described. The optical pulse signal is sent from the optical signal transmitting section 1 through the single mode optical fiber 3 to the optical pulse demultiplexer 2, and the optical pulse signal is divided into two. The optical pulse signals divided into two have the same length.
It is sent to the optical signal receiving units 6 and 7 having the same characteristics via the single mode optical fibers 4 and 5.
【００１２】光パルス信号は、光信号受信部６，７にて
電気パルス信号へ変換される。基準信号発生器８から
は、変換された電気パルス信号の比較の基準となる電気
パルスが出力される。比較器９では、変換された２つの
電気パルス信号と基準の電気パルスとの比較を行い、２
つの変換された電気パルス信号の中で、基準の電気パル
スにより近いもの、すなわち、偏波分散の影響の少ない
ものを選択し、出力する。The optical pulse signal is converted into an electric pulse signal by the optical signal receiving units 6 and 7. The reference signal generator 8 outputs an electric pulse as a reference for comparison of the converted electric pulse signals. The comparator 9 compares the converted two electric pulse signals with the reference electric pulse, and
Of the two converted electric pulse signals, one that is closer to the reference electric pulse, that is, one that is less affected by polarization dispersion is selected and output.
【００１３】[0013]
【発明の効果】以上説明したように本発明は、信号を２
分割し、人工衛星内部で互いに熱環境の異なる２本のシ
ングルモード光ファイバで伝送し、受信部にて偏波分散
の影響が少ない方の信号を基準信号と比較し選択するの
で、人工衛星内部で熱環境が変化し、シングルモード光
ファイバが温度変化により、その形状が変化することに
よって生じる偏波分散の信号伝送への影響を軽減すると
いう効果を有する。As described above, according to the present invention, the signal is converted into 2 signals.
It is split and transmitted by two single-mode optical fibers with different thermal environments inside the satellite, and the signal with the least influence of polarization dispersion is selected by comparing with the reference signal at the receiving section. Has the effect of reducing the influence on the signal transmission of the polarization dispersion caused by the change of the shape of the single mode optical fiber due to the change of the thermal environment and the temperature change of the single mode optical fiber.
【図１】本発明の一実施例のブロック図である。FIG. 1 is a block diagram of one embodiment of the present invention.
【図２】従来の技術に従う分散低減法の一例のブロック
図である。FIG. 2 is a block diagram of an example of a dispersion reduction method according to a conventional technique.
１ 光信号送信部 ２ 光分波器 ３，４，５ シングルモード光ファイバ ６，７ 光信号受信部 ８ 基準信号発生器 ９ 比較器 ２１ 入力電気信号端子 ２２ 電気−光変換器 ２３ 分散補償用シングルモード光ファイバ ２４ 接続部 ２５ 光ファイバケーブル ２６ 光−電気変換器 ２７ 電気信号出力端子 1 Optical signal transmitter 2 Optical demultiplexer 3, 4, 5 Single mode optical fiber 6, 7 Optical signal receiver 8 Reference signal generator 9 Comparator 21 Input electrical signal terminal 22 Electro-optical converter 23 Dispersion compensation single Mode Optical fiber 24 Connection part 25 Optical fiber cable 26 Optical-electrical converter 27 Electric signal output terminal
Claims (3)
した２本のシングルモード光ファイバと、 これら２本のシングルモード光ファイバを経てきた２つ
の光信号を受信し、偏波分散の影響が少ない方の系を選
択する手段と、 を備えることを特徴とする人工衛星内部光信号伝送路。1. A demultiplexer for demultiplexing an optical signal into two, two single-mode optical fibers connected to this demultiplexer and instrumented at locations different from each other in thermal environment, and these two An artificial-satellite internal optical signal transmission line comprising: means for receiving two optical signals that have passed through a single-mode optical fiber and selecting a system having a smaller influence of polarization dispersion.
する手段は、前記２本のシングルモード光ファイバを経
てきた２つの光信号をそれぞれ受信し、電気信号に変換
する２つの光信号受信部と、これら光信号受信部からの
電気信号を基準信号と比較する比較器とから成ることを
特徴とする請求項１記載の人工衛星内部光信号伝送路。2. The means for selecting a system that is less affected by the polarization dispersion is two optical signals that receive two optical signals that have passed through the two single-mode optical fibers and that convert them into electrical signals. 2. The artificial satellite internal optical signal transmission line according to claim 1, comprising a signal receiving unit and a comparator for comparing an electric signal from the optical signal receiving unit with a reference signal.
一の長さを有し、前記２つの光信号受信部は同一の特性
を有することを特徴とする請求項２記載の人工衛星内部
光信号伝送路。3. The artificial satellite internal optical signal according to claim 2, wherein the two single-mode optical fibers have the same length, and the two optical signal receiving sections have the same characteristics. Transmission line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5120025A JPH0821895B2 (en) | 1993-05-21 | 1993-05-21 | Optical signal transmission path inside satellite |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5120025A JPH0821895B2 (en) | 1993-05-21 | 1993-05-21 | Optical signal transmission path inside satellite |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06334606A JPH06334606A (en) | 1994-12-02 |
| JPH0821895B2 true JPH0821895B2 (en) | 1996-03-04 |
Family
ID=14776052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5120025A Expired - Lifetime JPH0821895B2 (en) | 1993-05-21 | 1993-05-21 | Optical signal transmission path inside satellite |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0821895B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020054212A (en) * | 2000-12-27 | 2002-07-06 | 오길록 | The Apparatus for Optical Transsmit and Receive with Efficiency |
| US8175455B2 (en) | 2006-10-11 | 2012-05-08 | Nec Corporation | Optical transmission system and optical transmission control method |
-
1993
- 1993-05-21 JP JP5120025A patent/JPH0821895B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06334606A (en) | 1994-12-02 |
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