JPS62105540A - Optical coupling device - Google Patents

Optical coupling device

Info

Publication number
JPS62105540A
JPS62105540A JP60245665A JP24566585A JPS62105540A JP S62105540 A JPS62105540 A JP S62105540A JP 60245665 A JP60245665 A JP 60245665A JP 24566585 A JP24566585 A JP 24566585A JP S62105540 A JPS62105540 A JP S62105540A
Authority
JP
Japan
Prior art keywords
optical
light
prism
component
coupling device
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
Application number
JP60245665A
Other languages
Japanese (ja)
Inventor
Hiroshi Ushigome
牛込 博
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Priority to JP60245665A priority Critical patent/JPS62105540A/en
Publication of JPS62105540A publication Critical patent/JPS62105540A/en
Pending legal-status Critical Current

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  • Optical Communication System (AREA)

Abstract

PURPOSE:To provide a light emitting and receiving function by placing two polarizing prisms opposite each other, splitting unpolarized input light into two, and utilizing the reflection of an S polarized component by the polarizing prisms. CONSTITUTION:The polarizing prisms 2a and 2b are arranged so that their polarizing films face each other; and the prism 2a is used for light reception and the prism 2b is used for light transmission. Received light Ro transmitted through an optical fiber cable is split by the prism 2a into a P polarized component RP and an S polarized component Rs; and the component Rp travels straight in the negative direction of a (y) axis and the component Rs travels in the (x)-axial direction. The component Rs incident on the prism 2b is reflected by the polarizing film to travel in the (y)-axial direction. Half of transmitted light To incident on the prism 2b along the (y) axis, on the other hand, travels straight as a P polarized component Tp when a light source is in a nonpolarization state and the S polarized component Ts is reflected and discarded. When the light source in a single polarization state, the light source is so arranged as to perform P polarization, and then nearly all of the light To becomes a component Tp as it is.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 この発明は、近年盛んに用いられている光LAN(Lo
cal Area Network )において、受信
光を受信するとともに送信光を送信する機能を有する光
カツプリング装置に関するものである。
[Detailed Description of the Invention] [Field of Industrial Application] This invention is applicable to optical LAN (Lo
The present invention relates to an optical coupling device that has the function of receiving received light and transmitting transmitted light in a cal area network.

〔従来の技術〕[Conventional technology]

まづ、従来のこの穂元カップリング装置について、第2
図および第3図ta+を用いて説明する。図中、(1)
は光分岐結合器、(2)は分光プリズム、(3)はロッ
ドレンズ、(6)はケース、(力はキャピラリー。
First, regarding this conventional head coupling device, the second
This will be explained using the figure and FIG. 3 ta+. In the figure, (1)
is an optical branching coupler, (2) is a spectroscopic prism, (3) is a rod lens, (6) is a case, (force is a capillary.

(8)は光ファイバーケーブルである。光分岐結合器(
1)は9分光プリズム(2)とロッドレンズ(!Sad
、 (5b)。
(8) is an optical fiber cable. Optical splitter coupler (
1) is a 9-spectrum prism (2) and a rod lens (!Sad
, (5b).

(3C)をケース(6)に納めたもので、光ファイバ・
ケーブル(8a)へ入つ1こ光エネルギを2分割し。
(3C) is housed in the case (6), and the optical fiber
One optical energy entering the cable (8a) is divided into two.

それぞれ光ファイバ・ケーブル(sb)、 (ac)へ
導出する。o7ドレンズ(5a)、 (5b)、 (5
C)は光を拡散光から平行光へ変換するもので、キャピ
ラリー (7a)、 (7bJ、 (7C)に接着され
ている。第3図fatはマルチドロップ式といわれる光
LANの構成例で、光送信器Txからの信号光を2分割
し、 2つの光受信器RX11 RX2に供給する。
They are led out to optical fiber cables (sb) and (ac), respectively. o7 drain lens (5a), (5b), (5
C) converts light from diffused light to parallel light, and is glued to capillaries (7a), (7bJ, and (7C)).Figure 3 fat is an example of the configuration of an optical LAN called a multi-drop type. The signal light from the optical transmitter Tx is divided into two parts and supplied to two optical receivers RX11 and RX2.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

上述したように、従来の光カツプリング装置では、光信
号の一部を分離することにより、いわゆるモニター機能
をもつ光受信器と結合させることができた。しかし、こ
の場合、J:、配光受信器を保有するキー・ステーショ
ンなどで、光信号を送信することかできず、光LANを
実現する上で不都合であった。また、これらを用いて送
受光機能をもたらせるためには、光示送路構成が複雑に
なるとともに経済的にも得策ではなかった。
As mentioned above, in the conventional optical coupling device, by separating a part of the optical signal, it was possible to couple it to an optical receiver having a so-called monitor function. However, in this case, a key station having a light distribution receiver or the like cannot transmit optical signals, which is inconvenient in realizing an optical LAN. Furthermore, in order to provide a light transmitting/receiving function using these, the configuration of the optical transmission path becomes complicated and it is not economically advisable.

〔問題点を解決するための手段〕[Means for solving problems]

この発明による光カツプリング装置は、2つの偏光プリ
ズムを対向させ、無偏光の入力光を2つに分離するとと
もに、S偏光成分か偏光プリズムの偏光膜で反射するこ
とを利用して構成したものである。
The optical coupling device according to the present invention is constructed by arranging two polarizing prisms facing each other, separating unpolarized input light into two, and reflecting the S-polarized component by the polarizing film of the polarizing prism. be.

〔作 用〕[For production]

この発明においては、入力光の半分が光/電気信号変換
素子に至り、残る半分か出力光となる。
In this invention, half of the input light reaches the optical/electrical signal conversion element, and the remaining half becomes output light.

また、電気/光信号変換素子をLDとした場合。Further, when the electrical/optical signal conversion element is an LD.

送信先の大半が出力光となり、LEDとしfこ場合。In this case, the majority of the destination will be the output light and will be an LED.

送信光の半分が出力光となる。Half of the transmitted light becomes output light.

〔実施例〕〔Example〕

第1図はこの発明の光カツプリング装置の実施例を示す
図であり1図中、(1)は光カツプリング装置、(2)
は偏光プリズム、(3)はロッドレンズ、(4)は光・
電気信号変換素子、(5)は電気・光信号変換素子、(
6)はケース、(7)は光コネクタ、(8)は光ファイ
バ・ケーブルである。光カツプリング装置fi+はケー
ス(6)内に偏光プリズム(2a)、 (2b)とロッ
ドレンズ(3a)、 (3b)、 (5C)から構jb
、aれる光学部と。
FIG. 1 is a diagram showing an embodiment of the optical coupling device of the present invention. In FIG. 1, (1) is the optical coupling device, (2)
is a polarizing prism, (3) is a rod lens, and (4) is a light beam.
Electric signal conversion element, (5) is electric/optical signal conversion element, (
6) is a case, (7) is an optical connector, and (8) is an optical fiber cable. The optical coupling device fi+ consists of polarizing prisms (2a), (2b) and rod lenses (3a), (3b), (5C) inside a case (6).
, with an optical section.

PDモジュール、APDモジュールナトの光・電気信号
変換素子およびLEDモジュール、LDモジュールなど
の電気・光信号変換素子を組み込んだものであり、光コ
ネクタ(7a)、 (7b)と光ファイバ・ケーブル(
aa)、 (ab)を接続することによって使用される
PD module, APD module Incorporates optical/electrical signal conversion elements such as LED modules, LD modules, etc., and includes optical connectors (7a), (7b) and optical fiber cables (
used by connecting aa) and (ab).

第3図(blはこの発明の光カツプリング装置の使用例
を示す図であり、バス形光LANに属する。
FIG. 3 (bl is a diagram showing an example of use of the optical coupling device of the present invention, which belongs to a bus type optical LAN).

光送信器Tx1からの光信号は光ファイバ・ケーブル(
8a)を径で、光カツプリング装置(1)に入る。
The optical signal from the optical transmitter Tx1 is transmitted through an optical fiber cable (
8a) into the optical coupling device (1).

一方、光送信器TX2からの送信信号は、 光カツプリ
ング装置(1)で光信号に変換され、光ファイバ・ケー
ブル(8b)を径で、光受信器RX2に送られる。しに
かつて、光カツプリング装置(1)を含むステーション
と他の光送受信器との通信、データ伝送か可能になる。
On the other hand, the transmission signal from the optical transmitter TX2 is converted into an optical signal by the optical coupling device (1) and sent to the optical receiver RX2 via the optical fiber cable (8b). At this time, communication and data transmission between a station including the optical coupling device (1) and other optical transceivers becomes possible.

第4図はこの発明の光カツプリング装置の光信号の流れ
を説明するものである。偏光プリズム(2a)、 (2
b)は偏光膜を互いに対向させて配置し。
FIG. 4 explains the flow of optical signals in the optical coupling device of the present invention. Polarizing prism (2a), (2
In b), the polarizing films are arranged facing each other.

偏光プリズム(2a)を受光用として、また、偏光プリ
ズム(2b)を送光用として用いる。偏光プリズムの偏
光分離作用は、いわゆるブリュースタ角において、P偏
光とS偏光の反射係数の異なる点を利用し1こものであ
る。光ファイバ・ケーブル内を伝送されてき1こ受信光
Ro(無偏光)は、偏光プリズム(2a)でP偏光成分
RpとS偏光成分Rsに分離され、 Rpはy軸の負方
向へ直進し、  R8はRpと直交する方向(X軸方向
ノヘ進行する。偏光プリズム(2b)へ入射しfこRs
は、偏光膜で反射され、そのままy軸方向へ進行する。
The polarizing prism (2a) is used for receiving light, and the polarizing prism (2b) is used for transmitting light. The polarization separation effect of a polarizing prism is based on the fact that the reflection coefficients of P-polarized light and S-polarized light differ at the so-called Brewster's angle. The received light Ro (non-polarized light) transmitted through the optical fiber cable is separated into a P-polarized component Rp and an S-polarized component Rs by a polarizing prism (2a), and Rp travels straight in the negative direction of the y-axis. R8 travels in the direction perpendicular to Rp (X-axis direction). It enters the polarizing prism (2b) and
is reflected by the polarizing film and proceeds directly in the y-axis direction.

一方、偏光プリズム(2b月と対し、y軸に沿って入射
する送信光Toは、光源が無偏光の場合その半分が”r
pとして直進し、S偏光成分子sは反射されすてられる
。ま1コ、光源が単一偏光の場合、P偏光となるような
光源配置を行なえば、はとんど全ての送信光Toがその
ままTpとなる。
On the other hand, when the light source is unpolarized, half of the transmitted light To incident along the y-axis with respect to the polarizing prism (2b) is "r".
It travels straight as p, and the S polarization component s is reflected and thrown away. Alternatively, if the light source is a single polarized light, if the light source is arranged so that it becomes P polarized light, almost all the transmitted light To becomes Tp as it is.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、この発明の光カツプリング装置に
よれば、偏光プリズムの偏光分離作用を利用し、入力光
の半分を光/電気信号変換素子で受光するとともに、残
る半分をそのまま出力光とし、まに、定電源切換えるな
どにより、必要に応じて電気/光信号変換素子を送信す
ることができる。すなわち、ループ形もしくはバス形な
どの光LANにおいて、光カツプリング装置として用い
ることかできる。
As explained above, according to the optical coupling device of the present invention, half of the input light is received by the optical/electrical signal conversion element by utilizing the polarization separation effect of the polarizing prism, and the remaining half is used as output light as it is. By switching the constant power supply, the electrical/optical signal conversion element can transmit data as necessary. That is, it can be used as an optical coupling device in a loop type or bus type optical LAN.

【図面の簡単な説明】[Brief explanation of drawings]

第1図はこの発明の光カツプリング装置の実施例を示す
図、第2図は従来のこの種の光カップリング装置の一例
を示す図、第3図tal、 (blは光LANの構成例
を示す図、第4図はこの発明の光カツプリング装置の作
用を説明するための図である。 図中、(1)は光分岐結合器もしくは光カツプリング装
置、(2)は偏光プリズムもしくは分光プリズム。 (3)はロッドレンズ、(4)は光・電気信号変換素子
。 (5)は電気・光信号変換素子、(6)はケース、(7
)は光コネクタもしくはキャピラリ、(8)は光ファイ
バーケーブルである。なお9図中、同一あるいは相当部
分には同一符号を付して示しである。
FIG. 1 is a diagram showing an embodiment of the optical coupling device of the present invention, FIG. 2 is a diagram showing an example of a conventional optical coupling device of this type, and FIG. 3 is a diagram showing an example of the configuration of an optical LAN. The figure shown in Fig. 4 is a diagram for explaining the operation of the optical coupling device of the present invention. In the figure, (1) is an optical branching/coupling device or an optical coupling device, and (2) is a polarizing prism or a spectroscopic prism. (3) is a rod lens, (4) is an optical/electrical signal conversion element, (5) is an electrical/optical signal conversion element, (6) is a case, (7
) is an optical connector or capillary, and (8) is an optical fiber cable. In FIG. 9, the same or corresponding parts are designated by the same reference numerals.

Claims (1)

【特許請求の範囲】[Claims] ループ形もしくはバス形などの光LAN(LoculA
rea Network)に用いられ、光ファイバ伝送
路間の信号中継機能を有する光カツプリング装置におい
て、2つの偏光プリズムと複数のロツドレンズから成る
光学部品、オートダイオードなどの光/電気信号変換素
子およびレーザダイオードもしくはLED(Light
 Emitted Diode)などの電気/光信号変
換素子から構成され、上記偏光プリズムの偏光分離作用
を利用して、上記光/電気信号変換素子で入力光の半分
を受光するとともに、残る半分の入力先はそのまま出力
光とし、また、必要に応じて上記電気/光信号変換素子
からの送信光を出力光とするよう構成したことを特徴と
する光カツプリング装置。
Optical LAN (LoculA) such as loop type or bus type
rea network) and has a signal relay function between optical fiber transmission lines, optical components consisting of two polarizing prisms and multiple rod lenses, optical/electrical signal conversion elements such as autodiodes, and laser diodes or LED (Light)
Using the polarization separation effect of the polarizing prism, the optical/electrical signal converting element receives half of the input light, and the remaining half is input to the An optical coupling device characterized in that the optical coupling device is configured to output light as it is, and to use transmitted light from the electrical/optical signal conversion element as output light as necessary.
JP60245665A 1985-11-01 1985-11-01 Optical coupling device Pending JPS62105540A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60245665A JPS62105540A (en) 1985-11-01 1985-11-01 Optical coupling device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60245665A JPS62105540A (en) 1985-11-01 1985-11-01 Optical coupling device

Publications (1)

Publication Number Publication Date
JPS62105540A true JPS62105540A (en) 1987-05-16

Family

ID=17136992

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60245665A Pending JPS62105540A (en) 1985-11-01 1985-11-01 Optical coupling device

Country Status (1)

Country Link
JP (1) JPS62105540A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03218134A (en) * 1990-01-09 1991-09-25 Internatl Business Mach Corp <Ibm> Optical fiber link card
JPH04160521A (en) * 1990-10-24 1992-06-03 Hitachi Ltd Electronic information processor
JPH04301933A (en) * 1990-10-15 1992-10-26 Internatl Business Mach Corp <Ibm> Optical interface device

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03218134A (en) * 1990-01-09 1991-09-25 Internatl Business Mach Corp <Ibm> Optical fiber link card
JPH0793603B2 (en) * 1990-01-09 1995-10-09 インターナシヨナル・ビジネス・マシーンズ・コーポレーシヨン Hikari fiber link card
JPH04301933A (en) * 1990-10-15 1992-10-26 Internatl Business Mach Corp <Ibm> Optical interface device
JPH04160521A (en) * 1990-10-24 1992-06-03 Hitachi Ltd Electronic information processor

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