JPH0323409A - Optical coupler - Google Patents
Optical couplerInfo
- Publication number
- JPH0323409A JPH0323409A JP15699889A JP15699889A JPH0323409A JP H0323409 A JPH0323409 A JP H0323409A JP 15699889 A JP15699889 A JP 15699889A JP 15699889 A JP15699889 A JP 15699889A JP H0323409 A JPH0323409 A JP H0323409A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical
- output end
- light beam
- input end
- 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
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 86
- 239000013307 optical fiber Substances 0.000 claims abstract description 23
- 230000008878 coupling Effects 0.000 abstract description 8
- 238000010168 coupling process Methods 0.000 abstract description 8
- 238000005859 coupling reaction Methods 0.000 abstract description 8
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 230000004907 flux Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 6
- 230000000694 effects Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000005304 optical glass Substances 0.000 description 1
Landscapes
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
この発明は、複数の光ファイバ端より出射する出射光を
単一の光ファイハに集光入射させるための光結合器に関
するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an optical coupler for condensing light emitted from a plurality of optical fiber ends into a single optical fiber.
第3図は従来の光結合器の一例を示す構成図である。図
において、(1a)および(Ib)は各人力側の光ファ
イハを示し、(2a)および(2b)は光ファイバ(I
a)および(lb)の端部を着脱可能に保持するための
光入力端であり実施例では光コネクタが用いられている
. (3a)および(3b)は光コ不クタ(2a)およ
び(2b)から出射する出射光を集光して略平行となる
光ビームに形戒するための集光レンズ、(lc)および
(2c)および(3c)は前記の光入力端と同一の構成
による光出力端に設けた光ファイバ、および光出力端(
光コネクタ〉、および集光レンズを示す.(4)は集光
レンズ(3a)〜(3c)の光路上に各光軸に対して4
5″の半透明膜が設けられた半透明鏡、(5)は光コ不
クタ(2a)〜(2c)が取付けられた光結合器の筐体
を示す。FIG. 3 is a configuration diagram showing an example of a conventional optical coupler. In the figure, (1a) and (Ib) indicate the optical fibers on each manual side, and (2a) and (2b) indicate the optical fibers (I).
This is an optical input end for detachably holding the ends of a) and (lb), and an optical connector is used in the embodiment. (3a) and (3b) are condenser lenses (lc) and (3b) for condensing the output light emitted from the optical converters (2a) and (2b) into approximately parallel light beams; 2c) and (3c) are optical fibers provided at the optical output end with the same configuration as the optical input end, and optical fibers provided at the optical output end (
Optical connector〉 and condensing lens are shown. (4) is 4 on the optical path of the condenser lenses (3a) to (3c) for each optical axis.
A semi-transparent mirror provided with a 5'' semi-transparent film, (5) shows the housing of the optical coupler to which the optical couplers (2a) to (2c) are attached.
従来の光結合器は、以上のように構成され、光ファイバ
(la)および(lb)から光コネクタ(2a)および
(2b)を介して出射する出射光を、集光レンズ(3a
)および(3b)を介して略平行な光ビームに形成され
る。この光ビームは光路上に設けられた半透明鏡(4)
によって、それぞれの光ビームが透過光と反射光とに分
割される。その結果、光ファイハ(1a)から出射した
光ビームの透過光が光出力端に設けられた集光レンズ(
3c)に達し、光ファイバ(lb)から出射した光ビー
ムの反射光が集光レンズ(3c)に達する.したがって
光出力端の光コネクタ(2c)には、光ファイバ(1a
)および(1b)からの光ビームが集光され、光ファイ
バ(Ic)に大光することになる.
〔発明が解決しようとする問題点〕
上記のように構成された従来の光粘合器においては、光
入力端から出射した光ビームが半透明鏡によって透過光
と反躬光に分割され、どちらか一方の光線だけが光出力
端に接続された光ファイバに人光できるだけで、無効と
なる光線が存在するため、結合撰失が大きくなるという
問題点があった。The conventional optical coupler is configured as described above, and the output light emitted from the optical fibers (la) and (lb) via the optical connectors (2a) and (2b) is connected to the condenser lens (3a).
) and (3b) into substantially parallel light beams. This light beam is transmitted through a semi-transparent mirror (4) installed on the optical path.
, each light beam is split into transmitted light and reflected light. As a result, the transmitted light of the light beam emitted from the optical fiber (1a) is transmitted through the condensing lens (
3c), and the reflected light of the light beam emitted from the optical fiber (lb) reaches the condenser lens (3c). Therefore, the optical fiber (1a) is connected to the optical connector (2c) at the optical output end.
) and (1b) are condensed into a large beam of light into the optical fiber (Ic). [Problems to be solved by the invention] In the conventional optical mixer configured as described above, the light beam emitted from the optical input end is split into transmitted light and reflected light by a semi-transparent mirror. Only one of the light beams can reach the optical fiber connected to the optical output end, and some light beams become invalid, resulting in a large loss of coupling.
この発明は、上記のような問題点を解決するためになさ
れたものであり、光入力端と光出力端との結合損失が少
ない光結合器を提供することを11的とするものである
。The present invention has been made to solve the above-mentioned problems, and its eleventh object is to provide an optical coupler with low coupling loss between an optical input end and an optical output end.
て問題点を解決するための手段〕
この発明に係る光結合器は、光入力端と光出力端との光
路に懸けて反射プリズムが設けられるとともに、光出力
端に設けられた集光レンズは、光入力端に設けられた集
光レンズが集光する光ビム径の少なくとも2倍以上の光
ビーム径が得られる塊点距諦を有する集光レンズとによ
り構成したものである。[Means for Solving the Problem] The optical coupler according to the present invention is provided with a reflecting prism along the optical path between the optical input end and the optical output end, and a condensing lens provided at the optical output end. , and a condenser lens having a lump point distance capable of obtaining a light beam diameter that is at least twice the diameter of the light beam condensed by the condenser lens provided at the light input end.
この発明における光結合器は、反射プリズムが各光入力
端の光ビームの光路を光出力端の光軸に近接した光路上
に移動し、この移動した各光入力端の光ビームの外東径
は、光出力端の集光レンズが有する焦点距離によって得
られる光ビーム径を下回り、光出力端に接続された光フ
ァイバの開[〕数を越えない範囲内に光入力端からの光
ビームを集光するよう作用する。In the optical coupler according to the present invention, the reflecting prism moves the optical path of the optical beam at each optical input end to an optical path close to the optical axis of the optical output end, and the outer east diameter of the optical beam at each optical input end that has been moved is The optical beam from the optical input end is smaller than the optical beam diameter obtained by the focal length of the condensing lens at the optical output end and does not exceed the aperture of the optical fiber connected to the optical output end. It acts to concentrate light.
第1図は、この発明による一実施例の構成図であり、図
中、(1a)〜(5)は、従来の光結合器と全く同一の
ものである。(6a)および(6b)は、光入力端の光
ビーム(図中AおよびR)を光出力端の光軸(図中C)
に近接させるために設けられた反11プリズムで実施例
では光綿ii!l過面が平j〒四辺形をなす光学ガラス
が用いられている.(7)は光出力端に設けられた集光
レンズで光入ツノ端に設けられている集光レンズ(3a
)および(3b)よりイC:.点距翻が2倍以上長く、
したがって光出力端の光ファイバ(1c)から光線を逆
に入射させた場合には、光入2′〕端の光ビームの少な
くとも2倍以上の光ビー1、径となるように設定される
。FIG. 1 is a block diagram of an embodiment according to the present invention, and in the figure, (1a) to (5) are completely the same as a conventional optical coupler. (6a) and (6b) connect the optical beam at the optical input end (A and R in the figure) to the optical axis at the optical output end (C in the figure).
In the example, the anti-11 prism is provided to bring it close to the light cotton ii! An optical glass whose transverse surface is a flat quadrilateral is used. (7) is a condenser lens provided at the light output end, and a condenser lens (3a) provided at the light input horn end.
) and (3b), IC:. The point distance is more than twice as long,
Therefore, when a light beam is made to enter from the optical fiber (1c) at the light output end in the opposite direction, the diameter of the light beam 1 is set to be at least twice that of the light beam at the light input end (2').
上記の構成において、光入力端の光ビーム(AおよびB
)は、反肘プリズム(6a)および(6b)によって光
路が反射屈折され、光出力端の光軸(C)にできる限り
近接し77投射されも。この投肘された光入力端からの
各光ビームの集合によって形威された光ビーム集合体の
外東径は、光出力端の集光レンズ(7)が集光する光フ
ァイバ(Ic)によって定められる光ビーム径より小さ
く設定されているため、光入力端からの各光ビームは、
全て上記の光出力端に接続された光ファイハ(IC)内
に入光可能である。In the above configuration, the light beams (A and B
), the optical path is reflected and refracted by the anti-elbow prisms (6a) and (6b), and is projected 77 as close as possible to the optical axis (C) at the light output end. The outer east diameter of the light beam assembly formed by the collection of each light beam from the elbowed light input end is determined by the optical fiber (Ic) condensed by the condensing lens (7) at the light output end. Since the diameter of each light beam from the optical input end is set smaller than the specified light beam diameter,
All of the light can be input into an optical fiber (IC) connected to the above-mentioned light output end.
第2図はこの発明の他の実施例による構成図であり、(
8a)および(8b)は、直角二角形の反射プリズムで
、光入力端は共に光出力端の光軸と直角方向に設置され
る。この場合においても入力端の光ビームは上記の説明
と同様に光出力端に接続された光ファイバ(lc)に達
する。FIG. 2 is a configuration diagram according to another embodiment of the present invention, (
8a) and (8b) are right-angled diagonal reflecting prisms, and both light input ends are installed in a direction perpendicular to the optical axis of the light output end. In this case as well, the light beam at the input end reaches the optical fiber (lc) connected to the optical output end in the same manner as described above.
したがって、従来の如き光入力端からの光ビムに無効と
なる光線が伴うことがなく、光入力端と光出力端間の結
合損失が最小限に押さえられる。Therefore, unlike the conventional optical beam from the optical input end, there is no invalid light beam, and the coupling loss between the optical input end and the optical output end is minimized.
なお、上記の説明では、人力端を2つ設けた場合につい
て説明したが、さらに複数配夏しても良いことはいうま
でもない.
〔発明の効果〕
以上のように、この発明によれば、光入力端の光ビーム
を全て光出力端に集光して、光出力端に接続された光フ
ァイバに大光するよう構成したので、結合}D失が極め
て少ない光結合器が得られるという効果がある。In addition, in the above explanation, the case where two manual power terminals were provided was explained, but it goes without saying that it is also possible to provide multiple manual power terminals. [Effects of the Invention] As described above, according to the present invention, all the light beams at the optical input end are condensed onto the optical output end, and a large amount of light is transmitted to the optical fiber connected to the optical output end. , coupling} has the effect that an optical coupler with extremely low D loss can be obtained.
第1図は、この発明の〜実施例による光結合21の構戒
図、第2図はこの発明の他の実施例を示す構成図、第3
図は従来の光結合2gを示す構成図である。
図において、(la) 〜(Ic)は光ファイハ、(2
a)−(2b)は光入力端(光コネクタ) 、(2c)
は光出力端(光コネクタ) 、(3a)〜(3b)は集
光レンズ、(5)は筐体、(6a) 〜(6b)および
(8a) 〜(8b)は反肘プリズム、(7)は集光レ
ンズである。
なお、図中、同一符号は同一、または相当部分を示す。FIG. 1 is a configuration diagram of an optical coupling 21 according to embodiments of the present invention, FIG. 2 is a configuration diagram showing another embodiment of the invention, and FIG.
The figure is a configuration diagram showing a conventional optical coupling 2g. In the figure, (la) to (Ic) are optical fibers, (2
a)-(2b) are optical input terminals (optical connectors), (2c)
is the optical output end (optical connector), (3a) to (3b) is the condenser lens, (5) is the housing, (6a) to (6b) and (8a) to (8b) are the anti-elbow prisms, (7 ) is a condenser lens. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.
Claims (3)
複数の光入力端と単一の光出力端とを有し、該光入力端
には光ファイバから出射する出射光を略平行光に集束す
るための集光レンズが設けられ、該光出力端には前記の
光入力端に設けられた集光レンズが形成する光ビーム径
の少なくとも2倍以上の光ビーム径が得られる焦点距離
を有する集光レンズが設けられるとともに、前記の光入
力端と光出力端に設けられた集光レンズ間に光入力端の
光路を光出力端の光軸に近接して投射させるための反射
面を有する反射プリズムとにより構成され、前記の光入
力端から出射する出射光を光入力端に設けられた集光レ
ンズおよび反射プリズムを介して、光出力端の光軸に近
接して投射せしめるとともに、光出力端の光軸に近接し
て投射された複数の光ビームを光出力端に設けられた集
光レンズによって集光し、該光出力端に接続された光フ
ァイバが有する開口数の範囲内に集光させるよう構成し
たことを特徴とする光結合器。(1) Connectable to an optical fiber having a predetermined numerical aperture;
It has a plurality of optical input ends and a single optical output end, the optical input end is provided with a condenser lens for converging the output light emitted from the optical fiber into substantially parallel light, and the optical output end is provided with a condenser lens having a focal length that can obtain a light beam diameter at least twice that of the light beam diameter formed by the condenser lens provided at the light input end; and a reflective prism having a reflective surface for projecting the optical path of the light input end close to the optical axis of the light output end, between the condensing lenses provided at the light output end, and the light is emitted from the light input end. The output light of An optical coupler characterized in that a light beam is condensed by a condensing lens provided at an optical output end, and the light beam is condensed within the numerical aperture range of an optical fiber connected to the optical output end. .
をなし、上記光入力端からの光ビームの光路が該プリズ
ムの対向内壁面で反射屈折されることにより、上記光出
力端と同一軸方向に光入力端が設けられたことを特徴と
する特許請求の範囲第1項記載の光結合器。(2) The reflecting prism has a parallelogram-shaped light passing surface, and the optical path of the light beam from the light input end is reflected and refracted by the opposing inner wall surface of the prism, so that it is identical to the light output end. The optical coupler according to claim 1, characterized in that an optical input end is provided in the axial direction.
をなし、上記光入力端からの光ビームの光路が該プリズ
ムの内壁面で反射屈折されることにより、上記光出力端
に対して鉛直方向に光入力端が設けられたことを特徴と
する特許請求の範囲第1項記載の光結合器。(3) The above-mentioned reflecting prism has a light beam passing surface in the form of a right triangle, and the optical path of the light beam from the above-mentioned light input end is reflected and refracted by the inner wall surface of the prism, so that it is perpendicular to the above-mentioned light output end. 2. The optical coupler according to claim 1, wherein the optical coupler is provided with an optical input end in the direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15699889A JPH0323409A (en) | 1989-06-20 | 1989-06-20 | Optical coupler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15699889A JPH0323409A (en) | 1989-06-20 | 1989-06-20 | Optical coupler |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH0323409A true JPH0323409A (en) | 1991-01-31 |
Family
ID=15639952
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15699889A Pending JPH0323409A (en) | 1989-06-20 | 1989-06-20 | Optical coupler |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPH0323409A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5357592A (en) * | 1993-08-17 | 1994-10-18 | Martin Marietta Corporation | Optical energy concentrator/reflector |
JP2011158497A (en) * | 2010-01-29 | 2011-08-18 | Yazaki Corp | Optical connector device |
US8992142B2 (en) | 2008-12-09 | 2015-03-31 | Iscar, Ltd. | Self-clamping cutting head for releasably mounting on a cutting tool |
-
1989
- 1989-06-20 JP JP15699889A patent/JPH0323409A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5357592A (en) * | 1993-08-17 | 1994-10-18 | Martin Marietta Corporation | Optical energy concentrator/reflector |
US8992142B2 (en) | 2008-12-09 | 2015-03-31 | Iscar, Ltd. | Self-clamping cutting head for releasably mounting on a cutting tool |
JP2011158497A (en) * | 2010-01-29 | 2011-08-18 | Yazaki Corp | Optical connector device |
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