JPS58136163A - Optical exchange - Google Patents
Optical exchangeInfo
- Publication number
- JPS58136163A JPS58136163A JP1811682A JP1811682A JPS58136163A JP S58136163 A JPS58136163 A JP S58136163A JP 1811682 A JP1811682 A JP 1811682A JP 1811682 A JP1811682 A JP 1811682A JP S58136163 A JPS58136163 A JP S58136163A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- signal
- switch
- terminal voltage
- subscriber
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q3/00—Selecting arrangements
- H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
- H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements
- H04Q3/526—Optical switching systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Use Of Switch Circuits For Exchanges And Methods Of Control Of Multiplex Exchanges (AREA)
Abstract
Description
【発明の詳細な説明】
杢発明は元信号を光のままで交換する小型で動作速度の
速い光交換機に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a compact and fast-operating optical switch that exchanges original signals in the form of light.
光交換機の基本機能として、加入者からの元信号を監視
、検出して元通話路を制御する必要がある。従来の光交
換機としては、第１図に示すような構成が考えらｎてい
る。第１図において、１は加入者、２は光フアイバケー
ブル、８は光交換機、４は通話路接続用元マトリクスス
イッチ、５は光分岐回路、６は光検出器で、次にその動
作について説明する。As a basic function of an optical switch, it is necessary to monitor and detect the original signal from the subscriber and control the original communication path. As a conventional optical switch, a configuration as shown in FIG. 1 has been considered. In Fig. 1, 1 is a subscriber, 2 is an optical fiber cable, 8 is an optical exchange, 4 is a source matrix switch for connecting communication paths, 5 is an optical branch circuit, and 6 is a photodetector.The operation thereof will be explained next. do.
まず加入者ｌからＱｙ６信号を光分岐回路５で分岐し、
光検出器ｂ１例えばＰＩＮフォトダイオードやムＰＤで
検出する。残りの光信号は通話路接続用光マトリクス・
スイッチ４に入力される。光検出器６で光電変換７ｎた
１Ｊ号は、接続制御回路７に導かれ、光曲話路を制御す
る。第１図の光マトリックス・スイッチ４では口■動形
ミラーの元マトリクス・スイッチを用いたが、他の形の
元マトリクスースイッチでもよい。First, the Qy6 signal from subscriber 1 is branched by optical branching circuit 5,
Detection is performed by a photodetector b1 such as a PIN photodiode or a mu PD. The remaining optical signals are transferred to the optical matrix for communication path connection.
It is input to switch 4. The photoelectrically converted signal 7n by the photodetector 6 is guided to the connection control circuit 7, which controls the optical path. Although the optical matrix switch 4 in FIG. 1 uses a mouth-moving mirror type matrix switch, other types of matrix switches may also be used.
このように加入者の元信号を監視するために光分岐回路
と光検出器を各々設ける必要があるので、次のような欠
点がある。Since it is necessary to provide an optical branch circuit and a photodetector to monitor the subscriber's original signal, there are the following drawbacks.
（１） 挿入損失が大きい、すなわち光分岐回路を仲
人することによる損失が避けられず、通常人、出射の結
合を考えると８（ｉＢＢ１０損失となる。(1) The insertion loss is large, that is, the loss due to intermediary optical branching circuits is unavoidable, and when the coupling of output and output is considered, the loss is 8 (iBB10).
（Ｉｔ） 分岐比の調整が困鋪である。加入者ごとに
レベル１ｉ１４整をする必要があり、このため光分岐［
囮紬としてハーフミラ−形、Ｙ分岐形、ノ（イコニカル
テーパ杉Ｕ〕いずれも調整が難かしい。(It) It is difficult to adjust the branching ratio. It is necessary to perform level 1i14 adjustment for each subscriber, so optical branching [
As a decoy pongee, half-mirror type, Y-branched type, and (iconical taper cedar U) are all difficult to adjust.
を傅１４檀化が困−である。光分岐回路と光検出器な各
々の加入者に設ける必要があることから、コンーパクト
に集積化することが罐かしい。また光分岐回路によって
分岐された光か、他チャンネルに結合することによるク
ロストークの増大かある。It is difficult to make a fui 14 fan. Since it is necessary to provide an optical branch circuit and a photodetector for each subscriber, it is difficult to integrate it compactly. Also, there is an increase in crosstalk due to the light being branched by the optical branching circuit or being coupled to other channels.
本発明は−これらの欠点を解決するために、元マトリク
ス・スイッチとしてＰＮ形半導体素子な用い、該元スイ
ッチ素子の爆千間の電圧変化を監視信号として用いる構
成としたものである。以下に図面（−より本発明の詳細
な説明する。In order to solve these drawbacks, the present invention uses a PN type semiconductor element as the original matrix switch, and uses the voltage change of the original switch element as a monitoring signal. The present invention will be described in detail below with reference to the drawings.
第２図は本発明で用いるＰＮ接合形半導体スインチ素子
の基本構成を示したものであり、該素子ヲ用いた元マト
リクス・スイッチについては特願昭５ｔｉ −４７１８
４号に詳述しである。第２図におい（，８はＰＮ接合形
半導体元スイッチ素子、９は光導光波路、ｌ（Ｌは負荷
抵抗を示している。光信号は該素子への注入電流をオン
、オフすることによってスイッチングざｎる。この元ス
イッチ素子を用いて光マトリクス・スイッチはコンパク
トに構成される。本発明では、該光スイツチ素子の端子
電圧変化を監視４８号として用いるもので、以下に具江
的に説明する。Figure 2 shows the basic structure of the PN junction type semiconductor switch element used in the present invention, and the original matrix switch using this element is disclosed in Japanese Patent Application No. 5ti-4718.
Details are given in issue 4. In Figure 2, (, 8 is a PN junction type semiconductor switching element, 9 is an optical waveguide, and l (L is a load resistance). The optical signal is switched by turning on and off the current injected into the element. An optical matrix switch is constructed compactly using this original switch element.In the present invention, the terminal voltage change of the optical switch element is used as a monitoring item 48, and will be explained in detail below. do.
第８図はＰＮ接合形半導体素子に光信号が入射した場合
の該素子の端子電圧変化を測定する測定系の構成図で、
１０は定電流源、１１はオシロスコープ、１２は光信号
結合用レンズ、１８は連続波の光信号を矩形波状の光信
号にするためのチョッパを表わす。FIG. 8 is a configuration diagram of a measurement system that measures the terminal voltage change of a PN junction type semiconductor device when an optical signal is incident on the device.
10 is a constant current source, 11 is an oscilloscope, 12 is an optical signal coupling lens, and 18 is a chopper for converting a continuous wave optical signal into a rectangular wave optical signal.
第１１は第８図の構成で端子電圧の変化を測定した結果
を示したものである。半導体レーザからの連続波の光を
チョッパで切り出し、該元スイッチ素子に注入した時の
端子電圧変化をオシロスコープで測定し、山から谷まで
の差の電圧値として示した。光スイツチ素子は半導体レ
ーザ素子を利用し、オンの状態は発振閾値σ）０．８８
倍σ）注入電流で測定した。オフの状態では−１５ｄｅ
ｎの入射パワで約０．５ ｍｖｕ＋出力電圧が得ら、ｎ
るのに対し°Ｃ５オ／の状態では−１０ｄＢｍて向柵度
の出力が優られた。オンの状態では圧入−流を発振閾値
に吐づけるに従って出力電圧は増大し、はぼオフでの出
力と同一度が得られることがわかった。ｔ’Ｎ接合接合
形体導体素子を注入した場合の端子電圧変化については
種々の文献があり（例えば三橋慶喜、島田膚−１三Ｖ秀
−１”自己結合半導体レーザの端子電圧変化”電子−１
１信学会技術研究報告資料ＯＱＥ ８０’−８８３、以
下のように端子電圧の変化は解釈できる。すなわちオフ
での端子電圧はＰＮ接合での光起電力によるもので、−
万、オンにおける端子電圧の変化は注入光による活性領
域のキャリア濃度の減少によるものと考えられる。11 shows the results of measuring changes in terminal voltage using the configuration shown in FIG. 8. Continuous wave light from a semiconductor laser was cut out with a chopper, and when it was injected into the original switching element, the change in terminal voltage was measured with an oscilloscope and shown as the voltage value of the difference from peak to valley. The optical switch element uses a semiconductor laser element, and the on state has an oscillation threshold σ) 0.88
times σ) measured at the injection current. -15de in off state
With an incident power of n, approximately 0.5 mvu+ output voltage is obtained, and n
On the other hand, when the temperature was 5 degrees Celsius, the output was superior by -10 dBm. It was found that in the on state, the output voltage increases as the press-in flow is discharged to the oscillation threshold, and the output voltage is the same as that in the off state. There are various documents regarding the terminal voltage change when a t'N junction type conductive element is implanted (for example, Yoshinobu Mitsuhashi, Shimada Hada-13V Hide-1 "Terminal voltage change of self-coupled semiconductor laser" Denshi-1
1 IEICE technical research report OQE 80'-883, the change in terminal voltage can be interpreted as follows. In other words, the terminal voltage in the OFF state is due to the photovoltaic force at the PN junction, and -
It is thought that the change in terminal voltage when the device is on is due to a decrease in the carrier concentration in the active region due to the injected light.
したがって該光スィッチではオフ、オフのいずれの状態
においても、強度変ｇ４された元信号を端子電圧の変化
として検出できるので、各加入者線のＶｉｆＩ！ｍ号と
して利用できることかわかる。次に実施例の構成法につ
いて説明する。Therefore, the optical switch can detect the original signal whose intensity has been changed g4 as a change in the terminal voltage in either the OFF or OFF state, so that the VifI! of each subscriber line! I understand that it can be used as the M number. Next, the configuration method of the embodiment will be explained.
第５図は本発明の一実施例の構成図で、ＰＮ接合形半導
体党スイッチ素子８は入線１と出線ｊの１＃号に対応し
てＳ と呼称する。Ｓ１３の各々は端１コ
子奄圧の変化を検出することができるので、各；１１１
人者の入線１の監視は多くの素子で可能であるかここで
はＳ工、で検出した信号で元通話路を制御する。この構
成ではＳ工、がオンでもオフでも監視が可能である。FIG. 5 is a block diagram of an embodiment of the present invention, in which the PN junction type semiconductor switching element 8 is designated as S corresponding to the number 1# of the input line 1 and output line j. Since each of S13 can detect a change in the pressure at one end, each;
Is it possible to monitor the input line 1 of a person by using many elements?Here, the source communication path is controlled by the signal detected by the S operator. With this configuration, monitoring is possible whether S is on or off.
第６図は本発明の池の実施例の構成図で、各加入層の人
１１対応に監視制御用スイッチ１４を設置し、Ｓ工。と
呼称する。この構成では加入者の発呼をＳよ。のオフの
状態で検出し、元通話路設定後はオンの状態で監視する
。この構成では監視制御用スイッチの部分では、元信号
が分岐されていないので、端子電圧の出力を大きくとる
ことか可能である。また該光スイツチ素子はオンの状態
で光信号を４幅する機能かあるので、後段のスイッチネ
ットワークを構成する場合に、光パワの１．ヘルに自由
度が増す長所がある。FIG. 6 is a block diagram of an embodiment of a pond according to the present invention, in which a supervisory control switch 14 is installed for each subscriber layer 11, and S construction is performed. It is called. In this configuration, the subscriber makes a call to S. It is detected when the device is off, and monitored when it is on after the original communication route is set. In this configuration, since the original signal is not branched at the supervisory control switch, it is possible to increase the output of the terminal voltage. In addition, since the optical switch element has the function of converting the optical signal into 4 widths when it is on, when configuring the subsequent switch network, it is necessary to increase the optical power to 1. Hell has the advantage of having more freedom.
以上説明したように、本発明の光交換機は監視制御用信
号として光スイツチ素子自体の端子電圧変化を利用する
ので、以下のような利点がある。As explained above, since the optical switch of the present invention utilizes the terminal voltage change of the optical switch element itself as a supervisory control signal, it has the following advantages.
（１） 挿入損失がない。監視制御用として光信号を
分岐しないので、本質的に低損失となる。また元スイッ
チ素子自体は層幅機能を持たすことも１１能である。(1) No insertion loss. Since optical signals for monitoring and control purposes are not branched, loss is essentially low. Furthermore, the original switching element itself can also have a layer width function.
（１１）元通話路設定後、各加入者の元信号を監視する
ことかできる。これは元スイッチをオンにした状態でも
、オフにした状態でも、信号検出がロエ能なためである
。(11) After setting the original communication path, it is possible to monitor the original signal of each subscriber. This is because signal detection is possible regardless of whether the original switch is on or off.
（ｉｌｌ） 高集積化が可能である。監視制御用とし
て特別な回路を設けないθ）で、光マ） ＩＪクス、ス
イッチがそのまま使える。該光マトリクス・スイッチは
半導体プロセス技術で高集積化が可能である。(ill) High integration is possible. With θ), no special circuit is required for monitoring and control, optical machining, IJ, and switches can be used as is. The optical matrix switch can be highly integrated using semiconductor process technology.
（ＩＶ） 監視側＃信号が電気信号でＩｊＬ接得られ
るので、光通話略制御用信号として直接便用することが
できる。(IV) Since the # signal on the monitoring side can be obtained as an electrical signal from IjL, it can be directly used as an optical communication control signal.
第１図は従来の光交換機の構成図、
第２図は本発明の実施例で用いる元スイッチ素子の基本
構成図、
第３図は該元スイッチ素子の端子電圧変化を測定する系
の構成図、
第４図は端子電圧変化の測定結果を不す図、第５図およ
び第６図は本発明の光交換機の実施例の構成図である。
■・・・加入者、２・・・元ファイバケーブル、８・・
・光交換機、４・・・通１１ｉ！ｉ賂接続用元マトリク
ススイッチ、５・・・光分岐回路、６・・・光検出器、
７・・・接続制御１０１路、８・・・ＰＮ接合形半導体
元スイッチ素子、９・・・光導波路、１０・・・定電流
源、１１・・・オシロスコープ、１２・・・元信号結合
用レンズ、１８・・・チョッパ、■４・・・監視制御用
スイッチ。
第１図
む
第２図 吃
第：３図
第４１閾
大村ノマワ （ｄＢＭ）
第３図
第ｔ１図Fig. 1 is a block diagram of a conventional optical switch; Fig. 2 is a basic block diagram of a switching element used in an embodiment of the present invention; Fig. 3 is a block diagram of a system for measuring changes in terminal voltage of the switching element. , FIG. 4 is a diagram showing the measurement results of terminal voltage changes, and FIGS. 5 and 6 are configuration diagrams of an embodiment of the optical exchanger of the present invention. ■...Subscriber, 2...Original fiber cable, 8...
・Optical switch, 4...11i! Original matrix switch for i-wire connection, 5... Optical branch circuit, 6... Photodetector,
7... Connection control 101 path, 8... PN junction type semiconductor element switching element, 9... Optical waveguide, 10... Constant current source, 11... Oscilloscope, 12... Original signal coupling Lens, 18... Chopper, ■4... Monitoring control switch. Figure 1 Figure 2 Figure 3 Figure 41 Threshold Omura no Mawa (dBM) Figure 3 Figure t1
Claims (1)
用いた元マトリクススイッチによる通話路接続用元スイ
ッチと、その接続制御を何う接続制＃部とを具備する光
交換機において、加入者の信号を監視するため、各加入
者線に接続される少なくとも１個以上の前記光スイツチ
素子の端子電圧変化を監視１６号として用いて元通話路
の制御を行うことを特酸とする光交換機。L Monitor the subscriber's signal in an optical exchange equipped with a source switch for connecting communication paths using a source matrix switch using a PN junction type semiconductor switch as the source switch element, and a connection control unit that controls the connection. Therefore, the optical switching system is characterized in that the terminal voltage change of at least one optical switch element connected to each subscriber line is used as a monitoring signal 16 to control the original communication path.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1811682A JPS58136163A (en) | 1982-02-09 | 1982-02-09 | Optical exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1811682A JPS58136163A (en) | 1982-02-09 | 1982-02-09 | Optical exchange |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58136163A true JPS58136163A (en) | 1983-08-13 |
| JPS6348470B2 JPS6348470B2 (en) | 1988-09-29 |
Family
ID=11962635
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1811682A Granted JPS58136163A (en) | 1982-02-09 | 1982-02-09 | Optical exchange |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58136163A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8408263B2 (en) | 2003-12-01 | 2013-04-02 | Fuji Electric Holding Co., Ltd. | Vacuum lamination device |
-
1982
- 1982-02-09 JP JP1811682A patent/JPS58136163A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8408263B2 (en) | 2003-12-01 | 2013-04-02 | Fuji Electric Holding Co., Ltd. | Vacuum lamination device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6348470B2 (en) | 1988-09-29 |
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