JPH0257741B2 - - Google Patents
Info
- Publication number
- JPH0257741B2 JPH0257741B2 JP58179261A JP17926183A JPH0257741B2 JP H0257741 B2 JPH0257741 B2 JP H0257741B2 JP 58179261 A JP58179261 A JP 58179261A JP 17926183 A JP17926183 A JP 17926183A JP H0257741 B2 JPH0257741 B2 JP H0257741B2
- Authority
- JP
- Japan
- Prior art keywords
- optical
- connector
- output
- earth
- signal
- 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
- 230000003287 optical effect Effects 0.000 claims description 69
- 238000004891 communication Methods 0.000 claims description 17
- 230000005540 biological transmission Effects 0.000 claims description 4
- 239000013307 optical fiber Substances 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 239000012212 insulator Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 201000004569 Blindness Diseases 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 210000001525 retina Anatomy 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 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
- H04B10/50—Transmitters
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mechanical Coupling Of Light Guides (AREA)
- Optical Couplings Of Light Guides (AREA)
- Optical Communication System (AREA)
Description
【発明の詳細な説明】 発明の技術分野 本発明は光通信装置に関する。[Detailed description of the invention] Technical field of invention The present invention relates to an optical communication device.
技術の背景
近年光通信が急速に普及している。然しなが
ら、光通信技術そのものはかなり発展した反面、
これに付随する種々の技術についてはこれから検
討すべきものも多い。本発明はそのうち防眼対策
技術について言及する。光通信装置はその出力よ
りレーザー光を送出するものであるが、可視光線
外の長波長（例えば1300nｍ波長）のレーザー光
を用いると、このレーザー光線は人間の眼の網膜
を容易に焼いてしまうことが知られている。そう
すると、光フアイバーと光通信装置とを接続しよ
うとする者は、非常に危険な状態に置かれること
になる。Technical Background Optical communications have been rapidly spreading in recent years. However, while optical communication technology itself has developed considerably,
There are many related technologies that need to be studied in the future. The present invention refers to eye protection technology. Optical communication devices send out laser light based on their output, but when using laser light with a long wavelength outside visible light (for example, 1300 nm wavelength), this laser light can easily burn the retina of the human eye. It has been known. In this case, a person attempting to connect the optical fiber and the optical communication device will be placed in a very dangerous situation.
従来技術と問題点
例えば光通信局舎内には、架に多数の光通信装
置が配設されており、各々には光出力コネクタが
設けられている。この光出力コネクタに対し光フ
アイバの光入力コネクタを接続する場合、その接
続作業者が光出力コネクタを覗くことは危険であ
る。このような接続作業に際しては当該光通信装
置からレーザー光を送出しないような状態にしな
ければならないことは当然であるが、接続作業の
度に常に光通信装置がそのような状態に置かれる
という保障はない。然しもし誤つたならば失明と
いう重大な事態を招く。Prior Art and Problems For example, in an optical communication station building, a large number of optical communication devices are arranged on racks, each of which is provided with an optical output connector. When connecting an optical input connector of an optical fiber to this optical output connector, it is dangerous for a person working on the connection to look into the optical output connector. It goes without saying that when performing such connection work, the optical communication equipment in question must be in a state in which no laser light is emitted, but there is no guarantee that the optical communication equipment will always be in such a state each time connection work is performed. There isn't. However, if you make a mistake, it can lead to a serious situation such as blindness.
そこで従来は、少なくとも開放状態にある光出
力コネクタにはプラグをはめておくということが
行われていた。然し、このようなプラグによる手
法では防眼対策として完全ではない。なぜならそ
のプラグを外したときに既にその光出力コネクタ
よりレーザー光が放射されているかもしれないか
らである。又、既に光フアイバーが接続している
光出力コネクタに他の光フアイバーをつなぎ替え
る場合には、そのようなプラグを利用する余地は
全くなく、防眼対策として全く無力である。これ
が問題点である。 Conventionally, therefore, at least the optical output connector that is in the open state is fitted with a plug. However, such a plug method is not perfect as an eye protection measure. This is because laser light may already be emitted from the optical output connector when the plug is removed. Furthermore, when connecting another optical fiber to an optical output connector to which an optical fiber has already been connected, there is no room for using such a plug, and it is completely useless as an eye protection measure. This is the problem.
発明の目的
従つて本発明は上記のようなプラグによること
なく、極めて安全度の高い防眼対策が実現できる
光通信装置を提供することを目的とするものであ
る。OBJECTS OF THE INVENTION Accordingly, it is an object of the present invention to provide an optical communication device that can realize extremely highly safe eye protection measures without using the above-mentioned plug.
発明の構成
上記目的を達成するため本発明は、伝送信号を
入力とする駆動回路と、該駆動回路からの出力信
号に応じた光出力を発生する電気／光変換器と、
該電気／光変換器からの光出力を送出する光出力
コネクタとを有し、ここに前記駆動回路は地気に
つながる信号の供給又はしや断によつてそれぞれ
駆動又は非駆動となり、該地気につながる信号は
前記光出力コネクタに対し対応する光入力コネク
タが接合されたときのみ供給されるようにしたこ
とを特徴とするものである。Structure of the Invention In order to achieve the above object, the present invention includes a drive circuit that receives a transmission signal as an input, an electric/optical converter that generates an optical output according to an output signal from the drive circuit,
an optical output connector for transmitting the optical output from the electrical/optical converter, wherein the driving circuit is activated or deactivated, respectively, by the supply or disconnection of a signal connected to the earth; The present invention is characterized in that the signal connected to the light is supplied only when the corresponding optical input connector is connected to the optical output connector.
発明の実施例 以下図面に従つて本発明を説明する。Examples of the invention The present invention will be explained below with reference to the drawings.
第１図は本発明に基づく光通信装置の一実施例
を示す模式図である。本図において、１１は
PCM信号等の伝送信号Sioを入力とする駆動回路
であり、主として伝送信号Sioを増幅する。この
駆動回路１１からの出力信号に応じた光出力Sput
を生成するのが電気／光変換器１２であり、通常
レーザーダイオードが用いられる。この光出力
Sputは、その出力端となる光出力コネクタ１３
に、光フアイバを介して伝送される。光出力コネ
クタ１３は、対応する光入力コネクタ１４と着脱
自在であり、光フアイバ１５を通してさらに所定
の機器へ導かれる。 FIG. 1 is a schematic diagram showing an embodiment of an optical communication device based on the present invention. In this figure, 11 is
This is a drive circuit that receives a transmission signal S io such as a PCM signal, and mainly amplifies the transmission signal S io . Optical output S put according to the output signal from this drive circuit 11
The electric/optical converter 12 generates the light, and usually a laser diode is used. This light output
S put is the optical output connector 13 which becomes the output end.
is transmitted via optical fiber. The optical output connector 13 is detachably connected to the corresponding optical input connector 14, and is further guided to a predetermined device through an optical fiber 15.
かくして、光出力コネクタ１３の開放端を直接
覗いたときに、もしこれより光出力Sputが放射さ
れていたとすると、その者の眼を害することは明
らかである。そこで、光入力コネクタ１４を光出
力コネクタ１３に接合しない限り、光出力Sputが
生成されないようにするというのが本発明の課題
である。この課題の解決のために、まず、駆動回
路１１に光通信装置１０内の地気Ｅにつながる信
号を供給又はしや断することにより、該駆動回路
１１をそれぞれ駆動又は非駆動となるようにす
る。例えば、既存の光出力安定化部（低域ろ波器
１６および比較器１７からなる）はその出力端Ｑ
に現われる信号を駆動回路１１に帰還するように
なつているので、これを流用し、該出力端Ｑに他
気Ｅにつながる信号を供給又はしや断できるよう
にきておく。地気Ｅにつながる信号、例えばイン
バータ２０の出力を帰還入力Ｆに受けない駆動回
路１１は非駆動となり、変換器１２の動作を止め
て光出力Sputの生成を停止させる。逆に、出力端
Ｑに地気Ｅにつながる、インバータ２０からの信
号を与えなければ、正常に光出力Sputの生成を開
始できる。 Thus, when looking directly into the open end of the optical output connector 13, if the optical output Sput were to be emitted from this, it is clear that it would harm the person's eyes. Therefore, it is an object of the present invention to prevent the optical output Sput from being generated unless the optical input connector 14 is connected to the optical output connector 13. In order to solve this problem, first, by supplying or cutting off a signal connected to the earth E in the optical communication device 10 to the drive circuit 11, the drive circuit 11 is driven or not driven, respectively. do. For example, the existing optical output stabilization unit (consisting of a low-pass filter 16 and a comparator 17) has an output terminal Q
Since the signal appearing in the output terminal Q is designed to be fed back to the drive circuit 11, this signal can be used to supply or cut off the signal connected to the other air E to the output terminal Q. The drive circuit 11 that does not receive a signal connected to the earth E, for example, the output of the inverter 20 at the feedback input F, becomes non-driven, stops the operation of the converter 12, and stops the generation of the optical output S put . Conversely, if the signal from the inverter 20 connected to the ground air E is not applied to the output terminal Q, the generation of the optical output Sput can be normally started.
そこで、出力端Ｑに対しインバータ２０を含ん
で新たに地気制御線１８を布線し、その他端を地
気接続部１９に導くことにする。この地気接触部
１９は、光出力コネクタ１３と光入力コネクタ１
４とが接合すると初めて地気Ｅにつながるインバ
ータ２０からの信号を出力端Ｑに与え、駆動回路
１１を駆動して変換器１２より光出力Sputを生成
させることができる。 Therefore, a new ground air control line 18 including the inverter 20 is wired to the output end Q, and the other end is led to the ground air connection section 19. This ground air contact part 19 is connected to the optical output connector 13 and the optical input connector 1.
4 is connected, a signal from the inverter 20 connected to the ground air E can be applied to the output end Q, and the drive circuit 11 can be driven to generate the optical output S put from the converter 12.
なお、本図の例では帰還入力Ｆへインバータ２
０を介して地気につながる信号を与えるようにし
ているが、これに限らず、駆動回路１１内の既存
のドライバトランジスタ（図示せず）のエミツタ
に制御線１８（インバータ２０を排除して）を直
接接続し、地気Ｅを得たときのみ、該ドライバト
ランジスタがアクテイブになるようにしても良
い。 In addition, in the example of this figure, the inverter 2 is connected to the feedback input F.
However, the present invention is not limited to this, and the control line 18 (without the inverter 20) can be applied to the emitter of an existing driver transistor (not shown) in the drive circuit 11. The driver transistor may be directly connected so that the driver transistor becomes active only when the ground air E is obtained.
第２Ａ図は第１図の地気接触部１９における地
気開放状態を説明するための図、第２Ｂ図は第１
図の地気接触部１９における地気接触状態を説明
するための図である。第２Ａ図に示す如く、地気
接触部１９は光出力コネクタ１３の一部に設けた
絶縁体２１とこれを貫通する接触子２２とからな
り、接触子２２は地気制御線１８につながつてい
る。コネクタ１３は通常、装置本体に直接固定さ
れており、もともと地気を帯びている。この地気
Ｅは、コネクタ１３および１４がネジ２３によつ
て接合しない限り、接触子２２、さらには制御線
１８には与えられない。 FIG. 2A is a diagram for explaining the earth air open state in the earth air contacting part 19 of FIG.
It is a figure for demonstrating the ground air contact state in the ground air contact part 19 of a figure. As shown in FIG. 2A, the earth contact part 19 consists of an insulator 21 provided on a part of the optical output connector 13 and a contact 22 penetrating the insulator 21, and the contact 22 is connected to the earth control line 18. There is. The connector 13 is usually directly fixed to the main body of the device, and is inherently earth-like. This earth air E is not applied to the contact 22 or even the control line 18 unless the connectors 13 and 14 are joined by the screw 23.
第２Ｂ図では、コネクタ１３および１４が接合
している。この接合状態のもとでは、コネクタ本
体同士（１３，１４）が電気的に接続し、接触子
２２とコネクタ１４とが電気的に接触することか
ら、地気Ｅは図中、点線の矢印に沿つて、制御線
１８に与えられ、駆動回路１１を駆動可能とする
ので光出力Sputが変換器１２より送出される。第
２Ａ図の状態では、地気Ｅが制御線１８に与えら
れることはなく、光出力Sputは生成されない。つ
まり人間の眼に危険を及ぼすことはない。 In Figure 2B, connectors 13 and 14 are joined. Under this bonded state, the connector bodies (13, 14) are electrically connected, and the contacts 22 and the connector 14 are in electrical contact, so that the earth air E is indicated by the dotted arrow in the figure. Along the line, the light is applied to the control line 18 to enable the drive circuit 11 to drive, so that the optical output S put is sent out from the converter 12 . In the state of FIG. 2A, no ground air E is applied to the control line 18, and no light output S put is generated. In other words, it poses no danger to human eyes.
第３図は光出力コネクタ１３の正面図である。
その一部に設けられた絶縁体２１より接触子２２
が突出している。なお、接触子２２は光入力コネ
クタ１４に当接して電気的接触を得るものである
から、弾性を備えていることが望ましい。従つて
必要ならば、コイルスプリング状の接触子とする
のも良い。 FIG. 3 is a front view of the optical output connector 13.
A contact 22 is connected to an insulator 21 provided in a part of the contactor 22.
stands out. Note that since the contactor 22 comes into contact with the optical input connector 14 to obtain electrical contact, it is desirable that the contactor 22 has elasticity. Therefore, if necessary, a coil spring type contact may be used.
発明の効果
以上説明したように本発明によればかなり安全
度の高い防眼対策を施した光通信装置が実現され
る。Effects of the Invention As explained above, according to the present invention, an optical communication device with considerably high safety eye protection measures can be realized.
第１図は本発明に基づく光通信装置の一実施例
を示す模式図、第２Ａ図は第１図の地気接触部１
９における地気開放状態を説明するための図、第
２Ｂ図は第１図の地気接触部１９における地気接
触状態を説明するための図、第３図は光出力コネ
クタ１３の正面図である。
１１……駆動回路、１２……電気／光変換器、
１３……光出力コネクタ、１４……光入力コネク
タ、１８……地気制御線、１９……地気接触部、
２１……絶縁体、２２……接触子。
FIG. 1 is a schematic diagram showing an embodiment of an optical communication device based on the present invention, and FIG.
FIG. 2B is a diagram for explaining the earth air contact state at the earth air contact portion 19 of FIG. 1, and FIG. 3 is a front view of the optical output connector 13. be. 11... Drive circuit, 12... Electric/optical converter,
13... Optical output connector, 14... Optical input connector, 18... Earth control line, 19... Earth contact part,
21... Insulator, 22... Contact.
Claims (1)
路からの出力信号に応じた光出力を発生する電
気／光変換器と、該電気／光変換器からの光信号
の出力端となり、且つ光入力コネクタと接合自在
な光出力コネクタとを備え、該光入力コネクタが
該光出力コネクタと接合したときにのみ前記光出
力を発生する光通信装置において、 前記駆動回路に対し該光通信装置内の地気につ
ながる信号を供給又はしや断することにより、該
駆動回路をそれぞれ駆動又は非駆動とする地気制
御線と、 前記地気を帯びた前記光出力コネクタと前記光
入力コネクタとの機械的な接合又は非接合に伴つ
てそれぞれ電気的に接触又は非接触となり、前記
の地気につながる信号の供給又はしや断を行う地
気接触部とを設け、 前記光入力コネクタが前記光出力コネクタに接
合したとき、前記の地気につながる信号が、該地
気を帯びた該光出力コネクタより該光入力コネク
タ自身および前記地気接触部を通して前記駆動回
路に与えられることを特徴とする光通信装置。[Claims] 1. A drive circuit that receives a transmission signal as input, an electric/optical converter that generates an optical output according to an output signal from the drive circuit, and an optical signal output from the electric/optical converter. In an optical communication device that is provided with an optical output connector that serves as an output end and can be freely connected to an optical input connector, and generates the optical output only when the optical input connector is connected to the optical output connector, a ground control line that respectively drives or non-drives the drive circuit by supplying or cutting off a signal connected to the ground in the optical communication device; the optical output connector having the ground air; and an earth contact part that becomes electrically connected or non-contacted when mechanically connected or unconnected to the optical input connector, and supplies or disconnects the signal connected to the earth; When the input connector is connected to the optical output connector, the signal connected to the earth is applied from the optical output connector carrying the earth to the drive circuit through the optical input connector itself and the earth contact part. An optical communication device characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58179261A JPS6072429A (en) | 1983-09-29 | 1983-09-29 | Optical communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58179261A JPS6072429A (en) | 1983-09-29 | 1983-09-29 | Optical communication equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6072429A JPS6072429A (en) | 1985-04-24 |
| JPH0257741B2 true JPH0257741B2 (en) | 1990-12-05 |
Family
ID=16062754
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58179261A Granted JPS6072429A (en) | 1983-09-29 | 1983-09-29 | Optical communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6072429A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07105757B2 (en) * | 1986-10-31 | 1995-11-13 | 日本電気株式会社 | Laser light blocking method |
| JPS63212230A (en) * | 1987-02-27 | 1988-09-05 | Nec Corp | Laser light cutoff system |
| JPS63212229A (en) * | 1987-02-27 | 1988-09-05 | Nec Corp | Laser light cutoff system |
| JPH0816761B2 (en) * | 1993-04-13 | 1996-02-21 | 日本電気株式会社 | Optical amplifier control circuit |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5660527A (en) * | 1979-10-19 | 1981-05-25 | Olympus Optical Co | Light source device for endoscope |
-
1983
- 1983-09-29 JP JP58179261A patent/JPS6072429A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5660527A (en) * | 1979-10-19 | 1981-05-25 | Olympus Optical Co | Light source device for endoscope |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6072429A (en) | 1985-04-24 |
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