JPS6330605B2 - - Google Patents
Info
- Publication number
- JPS6330605B2 JPS6330605B2 JP59038751A JP3875184A JPS6330605B2 JP S6330605 B2 JPS6330605 B2 JP S6330605B2 JP 59038751 A JP59038751 A JP 59038751A JP 3875184 A JP3875184 A JP 3875184A JP S6330605 B2 JPS6330605 B2 JP S6330605B2
- Authority
- JP
- Japan
- Prior art keywords
- parallel
- glass body
- port
- demultiplexer
- interference film
- 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
Links
- 239000011521 glass Substances 0.000 claims description 25
- 230000003287 optical effect Effects 0.000 claims description 19
- 239000013307 optical fiber Substances 0.000 description 14
- 230000000694 effects Effects 0.000 description 4
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
- 238000007740 vapor deposition Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29379—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device
- G02B6/2938—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means characterised by the function or use of the complete device for multiplexing or demultiplexing, i.e. combining or separating wavelengths, e.g. 1xN, NxM
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
- G02B6/293—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
- G02B6/29346—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
- G02B6/29361—Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
- G02B6/29362—Serial cascade of filters or filtering operations, e.g. for a large number of channels
- G02B6/29365—Serial cascade of filters or filtering operations, e.g. for a large number of channels in a multireflection configuration, i.e. beam following a zigzag path between filters or filtering operations
- G02B6/29367—Zigzag path within a transparent optical block, e.g. filter deposited on an etalon, glass plate, wedge acting as a stable spacer
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
- Optical Filters (AREA)
Description
【発明の詳細な説明】
（技術分野）
本発明は、光合分波器の改良に関するものであ
る。Detailed Description of the Invention (Technical Field) The present invention relates to an improvement of an optical multiplexer/demultiplexer.
（従来技術）
従来、このような分野に１本の光フアイバ中に
異なる波長の光信号を結合または分離する機能を
持つ光合分波器は数多く報告されている。例え
ば、昭和58年度電子通信学会総合全国大会の
「2267光合分波器における色収差低減方法の検討」
に記載されている。(Prior Art) Many optical multiplexers/demultiplexers having a function of combining or separating optical signals of different wavelengths into a single optical fiber have been reported in this field. For example, ``Study of chromatic aberration reduction method in 2267 optical multiplexer/demultiplexer'' at the 1985 National Conference of the Institute of Electronics and Communication Engineers.
It is described in.
第１図は、従来の４波用光合分波器の一構成例
を示すもので、３つの光学研磨面を持つガラス体
１の一面１ａに異種の干渉膜フイルタ２ａ，２
ｂ，２ｃ，２ｄが並列配置されている。又、ガラ
ス体１の他の二面１ｂおよび１ｃにはロツドレン
ズ３ａ，３ｂ，３ｃ，３ｄおよび３ｅが密着接合
されており、対応する光フアイバ４ａ，４ｂ，４
ｃ，４ｄおよび４ｅからの光信号を平行ビームに
変換している。一方、前記ガラス体１の一面１ａ
には、反射膜５を形成した平行ガラス体６が、前
記干渉膜フイルタ２ａ，２ｂ，２ｃ，２ｄを介し
て密着接合している。なお、前記ガラス体１の一
面１ｂにはロツドレンズ３ｄが干渉膜フイルタ２
ｅを介して密着接合されている。 FIG. 1 shows an example of the configuration of a conventional four-wave optical multiplexer/demultiplexer, in which interference film filters 2a, 2 of different types are mounted on one surface 1a of a glass body 1 having three optically polished surfaces.
b, 2c, and 2d are arranged in parallel. Further, rod lenses 3a, 3b, 3c, 3d and 3e are closely bonded to the other two surfaces 1b and 1c of the glass body 1, and corresponding optical fibers 4a, 4b, 4
The optical signals from c, 4d and 4e are converted into parallel beams. On the other hand, one surface 1a of the glass body 1
, a parallel glass body 6 on which a reflective film 5 is formed is tightly bonded via the interference film filters 2a, 2b, 2c, and 2d. Incidentally, on one surface 1b of the glass body 1, a rod lens 3d is connected to an interference film filter 2.
They are tightly bonded via e.
以上の如き構成の光合分波器では、光フアイバ
４ｅを共通ポートとし、その他の光フアイバ４
ａ，４ｂ，４ｃ，４ｄを送信または受信ポートと
して作用する。すなわち、光フアイバ４ｅからの
光信号はロツドレンズ３ｅで平行ビーム化され、
ガラス体１の干渉膜フイルタ２ｄであらかじめ設
定した特定の波長を持つ光のみが反射され、干渉
膜フイルタ２ｅを経て光フアイバ４ｄへ結合され
る。一方、干渉膜フイルタ２ｄを通過したその他
の波長を持つ光は、平行ガラス体６の反射膜５で
反射し、干渉膜フイルタ２ｃへと進み、以下、上
述と同様の作様を繰り返して特定の光フアイバ４
ｃ，４ｂ，４ａと順に結合され、光合分波器とし
ての機能が得られるのである。 In the optical multiplexer/demultiplexer with the above configuration, the optical fiber 4e is used as a common port, and the other optical fibers 4e
a, 4b, 4c, and 4d act as transmitting or receiving ports. That is, the optical signal from the optical fiber 4e is converted into a parallel beam by the rod lens 3e,
Only light having a preset specific wavelength is reflected by the interference film filter 2d of the glass body 1, and is coupled to the optical fiber 4d via the interference film filter 2e. On the other hand, the light having other wavelengths that has passed through the interference film filter 2d is reflected by the reflection film 5 of the parallel glass body 6 and proceeds to the interference film filter 2c. optical fiber 4
c, 4b, and 4a in order to obtain the function of an optical multiplexer/demultiplexer.
なお、前記作用は、光の進行方向が逆であつて
も同様に行なわれることは説明するまでもない。 Note that it goes without saying that the above-mentioned effect is performed in the same way even if the traveling direction of the light is reversed.
しかしながら、上記構成の光合分波器では以下
の如き問題点が生じるのである。すなわち、
(1) 共通ポート用の光フアイバ４ｅとその他のポ
ート用の光フアイバ４ａ，４ｂ，４ｃ，４ｄが
平行に配置されていないので形状が大きくなる
とともに、光合分波器としての取り付け実装条
件の制約が厳しくなる。 However, the optical multiplexer/demultiplexer with the above configuration has the following problems. That is, (1) Since the optical fiber 4e for the common port and the optical fibers 4a, 4b, 4c, and 4d for other ports are not arranged in parallel, the shape becomes larger and the mounting conditions for the optical multiplexer/demultiplexer are reduced. restrictions will become stricter.
(2) ガラス体１の形状が複雑で、かつ反射膜５を
形成した平行ガラス体６を別部品として用意
し、しかも組立てに際して干渉膜フイルタ２ａ
〜２ｄを同時にはさんで貼り合せる複雑な作業
を伴なう。(2) The shape of the glass body 1 is complicated, and the parallel glass body 6 on which the reflective film 5 is formed is prepared as a separate part, and when assembled, the interference film filter 2a is
This involves the complicated work of simultaneously sandwiching and bonding 2d to 2d.
特に、干渉膜フイルタ２ａ〜２ｄの厚さにバ
ラツキがある場合には、それらの一部に接着剤
による空隙が出来、したがつて光透過率が低下
し、例えば光結合損失が増大する等、信頼性に
乏しいものとなる。 In particular, when there are variations in the thickness of the interference film filters 2a to 2d, voids are formed in some of them due to the adhesive, resulting in a decrease in light transmittance and, for example, an increase in optical coupling loss. It becomes unreliable.
(3) ロツドレンズ３とガラス体１との間には光学
用の接着剤で固定されており、両者間に生じる
光の反射は前記接着剤の屈折率の効果によつて
ある程度は避けることは出来るのであるが、少
なくともロツドレンズの材質とガラス体の材質
の屈折率の差異による不整合反射は避けること
が出来ない。(3) The rod lens 3 and the glass body 1 are fixed with an optical adhesive, and the reflection of light between the two can be avoided to some extent by the effect of the refractive index of the adhesive. However, mismatched reflections due to the difference in refractive index between the rod lens material and the glass body material cannot be avoided.
等の問題点が生じるのである。Problems such as these arise.
（発明の目的）
本発明はこのような問題点を除去する為になさ
れたものであつて、取り付け実装条件の自由度が
得られ、シンプルな構成で、しかも反射光の影響
を受けない光合分波器を提供することを目的とす
るものである。(Objective of the Invention) The present invention has been made in order to eliminate such problems, and it is possible to obtain a degree of freedom in mounting and mounting conditions, to have a simple configuration, and to achieve a light combining and splitting method that is not affected by reflected light. The purpose is to provide wave equipment.
（発明の構成）
すなわち、本発明は、異なる波長通過域を持つ
複数の干渉膜フイルタを配置した第１の面と、該
第１の面と平行に対向して全反射面を有する第２
の面と、第１と第２の面に直交する光学研磨面を
有する第３の面とを備えるガラス体と、互いに平
行して配した複数のポートとを用い、しかも、こ
の複数のポートを前記ガラス体の第１の面に対向
させて配置して構成したもので、これにより前記
目的を達成するものである。以下、図面を用いて
本発明を説明する。(Structure of the Invention) That is, the present invention has a first surface on which a plurality of interference film filters having different wavelength passbands are arranged, and a second surface having a total reflection surface facing parallel to the first surface.
and a third surface having an optically polished surface orthogonal to the first and second surfaces, and a plurality of ports arranged parallel to each other, It is arranged to face the first surface of the glass body, thereby achieving the above object. The present invention will be explained below using the drawings.
（発明の実施例）
第２図は本発明に係る光合分波器の一実施例を
示す構成図であつて、コリメータ、ここではボー
ルレンズ１１と光フアイバ１２を一体化した複数
のコリメータ１３、ここでは５本のコリメータ１
３ａ，１３ｂ，１３ｃ，１３ｄおよび１３ｅを平
行に配置している。又、ガラス体１４は互いに平
行な二面１４ａ，１４ｂと、これに直交する面１
４ｃの３つの平滑面を形成して成る。そして、前
記面１４ａには異つた波長通過域を持つ複数の干
渉膜フイルタ１５ａ，１５ｂ，１５ｃ，１５ｄが
並列に配置され、該面１４ａに対向し、平行に形
成する面１４ｂには反射ミラー１６が密着あるい
は蒸着処理等が設けられている。又、面１４ｃは
平滑研磨が施されているのみである。そして、前
記の如く成るコリメータ１３とガラス体１４の位
置関係は、共通ポート用のコリメータ１３ａから
の平行ビームは一旦空気中に露出し、次いで、ガ
ラス体１４の面１４ａの一部に干渉膜フイルタ１
５を経ず、しかも斜めに入射する如く設定、配置
されている。この時、空気とガラスの屈折率の違
いによつて生ずる反射光は、入射ビームの方向と
は異なるのでコリメータ１３ａ〜１３ｅ内の光フ
アイバ１２へは結合しない。すなわち、反射光の
影響は受けない構成となつているのである。(Embodiment of the Invention) FIG. 2 is a configuration diagram showing an embodiment of the optical multiplexer/demultiplexer according to the present invention, in which a plurality of collimators 13, in which a ball lens 11 and an optical fiber 12 are integrated, Here, five collimators 1
3a, 13b, 13c, 13d and 13e are arranged in parallel. Further, the glass body 14 has two surfaces 14a and 14b that are parallel to each other, and a surface 1 that is perpendicular to these two surfaces 14a and 14b.
It is formed by forming three smooth surfaces of 4c. A plurality of interference film filters 15a, 15b, 15c, and 15d having different wavelength passbands are arranged in parallel on the surface 14a, and a reflection mirror 16 is arranged on the surface 14b facing and parallel to the surface 14a. However, adhesion or vapor deposition treatment is provided. Further, the surface 14c is only polished smooth. The positional relationship between the collimator 13 and the glass body 14 as described above is such that the parallel beam from the collimator 13a for the common port is once exposed in the air, and then an interference film filter is placed on a part of the surface 14a of the glass body 14. 1
5, and is set and arranged so that it enters obliquely. At this time, the reflected light caused by the difference in refractive index between air and glass is different from the direction of the incident beam, so it is not coupled to the optical fibers 12 in the collimators 13a to 13e. In other words, the structure is such that it is not affected by reflected light.
以上の構成において、共通ポートであるコリメ
ータ１３ａを経た光フアイバ１２ａからの光ビー
ムは、先ず、ガラス体１４の第１の面１４ａを経
て第３の面１４ｃで全反射し、更に、第２の面１
４ｂに設けた反射ミラー１６でも全反射し、干渉
膜フイルタ１５ａに達する。この干渉膜フイルタ
１５ａでは、特定の波長を持つ光のみが通過し、
コリメータ１３ｂに結合される。又、他の波長を
持つ光は干渉膜フイルタ１５ａ、反射ミラー１６
で再び反射し、次の干渉膜フイルタ１５ｂへ達
し、以下、同様の作用が行なわれ、分波作用が行
なわれるのである。なお、光の進路はこの逆でも
同様で、その場合は分波器として作用することは
明白である。 In the above configuration, the light beam from the optical fiber 12a that passes through the collimator 13a, which is a common port, first passes through the first surface 14a of the glass body 14, is totally reflected at the third surface 14c, and is further reflected at the second surface 14c. Side 1
It is also totally reflected by the reflection mirror 16 provided at 4b and reaches the interference film filter 15a. This interference film filter 15a allows only light with a specific wavelength to pass through,
It is coupled to the collimator 13b. In addition, light having other wavelengths is filtered through an interference film filter 15a and a reflection mirror 16.
The light is reflected again and reaches the next interference film filter 15b, whereupon the same action is performed and a demultiplexing action is performed. Note that the path of light is the same even in the opposite direction, and in that case it is clear that it acts as a demultiplexer.
（発明の効果）
以上、詳細に説明したように本発明によれば、
片面に干渉膜フイルタを、これと対向する他面に
反射ミラーを配したガラス体を用い、更に、共通
ポートからの光ビームをガラス体の内部側面で全
反射させる構成としたことによつて、
(1) 共通ポートも含めて全ポートが同側に、しか
も平行に配置出来ることとなり、小形になり、
取り付け実装性に自由度が増大する。換言する
と、取り付けに際しての無駄な空間がなくなる
のである。(Effects of the Invention) As described above in detail, according to the present invention,
By using a glass body with an interference film filter on one side and a reflecting mirror on the opposite side, and by completely reflecting the light beam from the common port on the inner side of the glass body, (1) All ports, including the common port, can be placed on the same side and in parallel, resulting in a smaller size.
The degree of freedom in mounting and mounting increases. In other words, there is no wasted space during installation.
(2) 構成が極めて簡単で、しかも個々の部品につ
いて高い寸法精度が不要である。(2) The configuration is extremely simple, and high dimensional accuracy is not required for individual parts.
(3) 光ビームがガラス体平面に対して垂直に入、
出射しない為に反射光の影響を受けない。すな
わち、無反射型の光合分波器が実現出来る。(3) The light beam enters perpendicularly to the plane of the glass body,
Since it does not emit light, it is not affected by reflected light. In other words, a non-reflective optical multiplexer/demultiplexer can be realized.
等の優れた効果が期待出来るのである。Excellent effects such as these can be expected.
第１図は従来の光合分波器の一構成例を示す図
であり、第２図は本発明に係る光合分波器の一実
施例を示す図である。
１はガラス体、２ａ，２ｂ，２ｃ，２ｄ，２ｅ
は干渉膜フイルタ、３ａ，３ｂ，３ｃ，３ｄ，３
ｅはロツドレンズ、４ａ，４ｂ，４ｃ，４ｄ，４
ｅは光フアイバ、５は反射膜、６は平行ガラス
体、１１はボールレンズ、１２は光フアイバ、１
３ａ，１３ｂ，１３ｃ，１３ｄ，１３ｅはコリメ
ータ、１４はガラス体、１５ａ，１５ｂ，１５
ｃ，１５ｄは干渉膜フイルタ、１６は反射ミラー
である。
FIG. 1 is a diagram showing an example of the configuration of a conventional optical multiplexer/demultiplexer, and FIG. 2 is a diagram showing an embodiment of the optical multiplexer/demultiplexer according to the present invention. 1 is a glass body, 2a, 2b, 2c, 2d, 2e
are interference film filters, 3a, 3b, 3c, 3d, 3
e is a rod lens, 4a, 4b, 4c, 4d, 4
e is an optical fiber, 5 is a reflective film, 6 is a parallel glass body, 11 is a ball lens, 12 is an optical fiber, 1
3a, 13b, 13c, 13d, 13e are collimators, 14 is a glass body, 15a, 15b, 15
c and 15d are interference film filters, and 16 is a reflecting mirror.
Claims (1)
て列状に配置され、平行ビームが入出力するポー
ト部と、 異なる波長通過域を各々有する複数の干渉膜フ
イルタが前記複数の第２のポートに対応して配置
された第１の面と、第１の面と平行に対向し、平
行ビームを全反射する第２の面と、第１の面と第
２の面とに直交し、光学研磨された第３の面とを
有したガラス体とを有し、 前記ガラス体は、前記平行ビームに対し所定角
をなし、前記平行ビームが空気を介して入出力さ
れるものであり、 前記ポート部の一端のポートの平行ビームは、
第３の面及び第２の面で反射することを特徴とし
た光合分波器。 ２ 前記ポートが、ボールレンズを用いたコリメ
ータとしたことを、特徴とした特許請求の範囲第
１項記載の光合分波器。[Claims] 1. A first port and a second port are arranged in a row parallel to each other, a port portion through which parallel beams are input and output, and a plurality of interference films each having a different wavelength passband. A filter has a first surface disposed corresponding to the plurality of second ports, a second surface facing parallel to the first surface and totally reflecting the parallel beam, and a glass body having an optically polished third surface perpendicular to the second surface, the glass body forming a predetermined angle with respect to the parallel beam, and the parallel beam passing through the air. The parallel beam of the port at one end of the port section is
An optical multiplexer/demultiplexer characterized by reflection on a third surface and a second surface. 2. The optical multiplexer/demultiplexer according to claim 1, wherein the port is a collimator using a ball lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3875184A JPS60184215A (en) | 1984-03-02 | 1984-03-02 | Optical multiplexer/demultiplexer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3875184A JPS60184215A (en) | 1984-03-02 | 1984-03-02 | Optical multiplexer/demultiplexer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60184215A JPS60184215A (en) | 1985-09-19 |
| JPS6330605B2 true JPS6330605B2 (en) | 1988-06-20 |
Family
ID=12533998
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3875184A Granted JPS60184215A (en) | 1984-03-02 | 1984-03-02 | Optical multiplexer/demultiplexer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60184215A (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6201908B1 (en) * | 1999-07-02 | 2001-03-13 | Blaze Network Products, Inc. | Optical wavelength division multiplexer/demultiplexer having preformed passively aligned optics |
| CN100422777C (en) * | 2002-11-01 | 2008-10-01 | 欧姆龙株式会社 | Optical multiplexer/demultiplexer and production method for optical multiplexer/demultiplexer |
| JP5223239B2 (en) * | 2007-05-17 | 2013-06-26 | 株式会社日立製作所 | Optical multiplexer / demultiplexer |
| CN110531472A (en) * | 2019-09-24 | 2019-12-03 | 武汉光迅科技股份有限公司 | A kind of light emitting devices, light receiving element and optical module |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55155204U (en) * | 1979-04-24 | 1980-11-08 |
-
1984
- 1984-03-02 JP JP3875184A patent/JPS60184215A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60184215A (en) | 1985-09-19 |
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| Date | Code | Title | Description |
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| EXPY | Cancellation because of completion of term |