JPS6275502A - Optical multiplexer/demultiplexer - Google Patents
Optical multiplexer/demultiplexerInfo
- Publication number
- JPS6275502A JPS6275502A JP21510585A JP21510585A JPS6275502A JP S6275502 A JPS6275502 A JP S6275502A JP 21510585 A JP21510585 A JP 21510585A JP 21510585 A JP21510585 A JP 21510585A JP S6275502 A JPS6275502 A JP S6275502A
- Authority
- JP
- Japan
- Prior art keywords
- glass body
- substrate
- thermal expansion
- base plate
- intermediate material
- 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
Landscapes
- Optical Couplings Of Light Guides (AREA)
- Optical Integrated Circuits (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、コリメータを用いた光合分波器に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to an optical multiplexer/demultiplexer using a collimator.
従来の光合分波器を第3図および第4図に従って説明す
る。A conventional optical multiplexer/demultiplexer will be explained with reference to FIGS. 3 and 4.
第3図は平面図、第4図は側面図であり、図にオイテ1
a 、 1 b 、 1 cはコリメータであり
、光ファイバ2a、2b、2cと集束性ロッドレンズ3
a、3b、3cを一体にして形成してあり、それぞれス
ペーサ4a、4b、4cを介して平行に基板5に固定さ
れていて平行ビームを作成するようになっている。Figure 3 is a plan view and Figure 4 is a side view.
a, 1b, 1c are collimators, and optical fibers 2a, 2b, 2c and a focusing rod lens 3
a, 3b, and 3c are integrally formed, and are fixed to the substrate 5 in parallel via spacers 4a, 4b, and 4c, respectively, to create a parallel beam.
6は上記コリメータIa、1b、1cに対して一定角度
に傾けて基板5に固定したガラス体であり、コリメータ
1a、1b、1cに対向する平行な第1面5a、第2面
6bと、この第1.第2の両面6a、6bに直交する第
3面6cの3つの平滑面より成り、上記第1面6aには
異なった波長通過域を持つ複数の干渉膜フィルタ7a、
7bが並列に配列されてそれぞれの干渉膜フィルタ7a
。A glass body 6 is fixed to the substrate 5 at a fixed angle with respect to the collimators Ia, 1b, and 1c, and has a parallel first surface 5a and a second surface 6b facing the collimators 1a, 1b, and 1c. 1st. It consists of three smooth surfaces, a third surface 6c orthogonal to the second surfaces 6a and 6b, and the first surface 6a has a plurality of interference film filters 7a having different wavelength passbands,
7b are arranged in parallel to form respective interference film filters 7a.
.
7bは上記コリメータ1b、1cと光軸が一致するよう
に対向位置に配置されている。この第1面6aに平行な
第2面6bには反射ミラー8が取付けである。7b is disposed at a position facing the collimators 1b and 1c so that their optical axes coincide with each other. A reflecting mirror 8 is attached to a second surface 6b parallel to the first surface 6a.
以上の構成によると、共通ポートであるコリメータ1a
を経た光はガラス体6に第1而6aから入光し、この光
は第3面6cで全反射し、さらに第2面6bでは反射ミ
ラー8によって全反射して干渉膜フィルタ7aに照射さ
れる。According to the above configuration, the collimator 1a which is the common port
The light enters the glass body 6 from the first surface 6a, is totally reflected on the third surface 6c, is further totally reflected on the second surface 6b by the reflection mirror 8, and is irradiated onto the interference film filter 7a. Ru.
この干渉膜フィルタ7aでは、この干渉膜フィルタ7a
を通過できる波長の光のみが通過してコツメータ1bに
入光結合される。In this interference film filter 7a, this interference film filter 7a
Only light having a wavelength that can pass through the sensor 1b passes through and is coupled into the cot meter 1b.
従ってその他の波長の光はこの干渉膜フィルタ7aを反
射し、さらに反射ミラー8で再び反射して次の干渉膜フ
ィルタ7bに照射まれでコリメータ1cに結合される。Therefore, light of other wavelengths is reflected by this interference film filter 7a, further reflected again by the reflection mirror 8, and irradiated onto the next interference film filter 7b, whereupon it is coupled to the collimator 1c.
以上のようにして光の分波作用が行なわれるが、光の送
路が逆の場合には光の合波作用が行なわれることになる
。 −
〔発明が解決しようとする問題点〕
以上のような従来の光合分波器によると、コリメータ1
a、1b、icおよびガラス体6の相対的な位置ずれが
光の結合損失となって大きく現われてくる。The light demultiplexing action is performed as described above, but when the light transmission path is reversed, the light multiplexing action is performed. - [Problems to be solved by the invention] According to the conventional optical multiplexer/demultiplexer as described above, the collimator 1
The relative positional deviation of a, 1b, ic, and the glass body 6 becomes a large coupling loss of light.
特に基板5とガラス体6との熱膨張係数の差異により、
温度変化があると反りや位置ずれまたははがれが生じる
と云う問題がある。In particular, due to the difference in thermal expansion coefficient between the substrate 5 and the glass body 6,
There is a problem in that temperature changes can cause warping, misalignment, or peeling.
上記の如くガラス体6内を光が複数回反射すると、ガラ
ス体6の微小な動きでも光軸のずれが反射する毎に拡大
されて最終的には非常に大きな損失となって現われる問
題がある。When light is reflected multiple times within the glass body 6 as described above, there is a problem in that even the slightest movement of the glass body 6 causes the deviation of the optical axis to be magnified each time it is reflected, resulting in a very large loss in the end. .
本発明は、基板に取付けた平行ビームを作成するコリメ
ータと、このコリメータに光軸が一致するように上記基
板に取付けた合波・分波機能を有するガラス魁よ構成る
光合分波器において、ガラス体と基板との間にガラス体
の熱膨張係数と基板の熱膨張係数との中間の熱膨張係数
を有する中間材を介在させて全一体に固定したことを特
徴とする。The present invention provides an optical multiplexer/demultiplexer comprising a collimator attached to a substrate to create a parallel beam, and a glass pipe having a multiplexing/demultiplexing function attached to the substrate so that the optical axis coincides with the collimator. It is characterized in that an intermediate material having a coefficient of thermal expansion intermediate between the coefficient of thermal expansion of the glass body and the coefficient of thermal expansion of the substrate is interposed between the glass body and the substrate so that the glass body and the substrate are fixed integrally.
以上の構成によると、温度変化にょシガラス体と基板と
に生ずる膨張変化はそれぞれ中間材との接合面で応力が
作用することにより基板の熱膨張変化が直接ガラス体に
伝わらず反りゃ立置ずれが緩和されてコリメータに対す
る光軸のずれが少なぐなって結合損失が小さくなる。According to the above configuration, the thermal expansion changes that occur in the glass body and the substrate due to temperature changes are caused by stress acting on the joint surface with the intermediate material, so that the thermal expansion change of the substrate is not directly transmitted to the glass body, and if it warps, it may cause vertical misalignment. is relaxed, the deviation of the optical axis with respect to the collimator is reduced, and the coupling loss is reduced.
以下に本発明の実施例を図面に従って説明する。 Embodiments of the present invention will be described below with reference to the drawings.
第1図は平面図、第2図は側面図である。なお、以下の
説明において上記従来技術と同一部位については同一符
号で説明する。FIG. 1 is a plan view, and FIG. 2 is a side view. In the following description, parts that are the same as those in the prior art described above will be described using the same reference numerals.
図において1a、 1b、1cはコリメータであり、
光ファイバ2a、2b、2cと集束性ロッドレンズ3a
、3b、3cを一体にして形成してあり、それぞれスペ
ーサ4a、4b、4cを介して平行に基板5に固定され
て平行ビームを作成するようになっている。In the figure, 1a, 1b, and 1c are collimators,
Optical fibers 2a, 2b, 2c and focusing rod lens 3a
, 3b, and 3c are integrally formed, and are fixed to the substrate 5 in parallel via spacers 4a, 4b, and 4c, respectively, to create a parallel beam.
上記基板5は一般に黄銅やアルミニウムによって製造さ
れている。The substrate 5 is generally made of brass or aluminum.
6は上記コリメータIa、Ib、1cに対して一定角度
に傾けて中間材9を介して基板5に固定したガラス体で
ちり、コリメータ1a、1b、1cに対向する平行な第
1面5aX第2面6bと、この第】、第2両面[5a、
5bに直交する第3面6cの3つの平滑面より成り、上
記第1面6aには異なつだ波長通過域を持つ複数の干渉
膜フィルタ7a。Reference numeral 6 denotes a glass body which is tilted at a certain angle with respect to the collimators Ia, Ib, and 1c and fixed to the substrate 5 via an intermediate material 9, and has a first surface 5a and a second parallel surface facing the collimators 1a, 1b, and 1c. surface 6b, this second surface [5a,
The first surface 6a includes a plurality of interference film filters 7a having different wavelength passbands.
7bが並列に配列されてそれぞれの干渉膜フィルタγa
、γbは上記コリメータ1b、1cと光軸が一致するよ
うに対向位置に配置されている。この第1面6aに平行
な第2面6bには反射ミラー8が取付けである。7b are arranged in parallel and each interference film filter γa
, γb are arranged at opposing positions so that their optical axes coincide with the collimators 1b and 1c. A reflecting mirror 8 is attached to a second surface 6b parallel to the first surface 6a.
上記中間材9は、基板5の熱膨張係数とガラス体6の熱
膨張係数との間にある熱膨張係数を有する物質であり例
えば鉄板などにより作られるもので、その物質を決める
場合、基板5の熱膨張係数よりガラス体6の熱膨張係数
に近い熱膨張係数値を有する物質を用いる方がよい。The intermediate material 9 is a material having a thermal expansion coefficient between that of the substrate 5 and that of the glass body 6, and is made of, for example, an iron plate. It is better to use a material having a coefficient of thermal expansion closer to that of the glass body 6 than that of the glass body 6 .
以上の構成によると、温度変化によシ基板5とガラス体
6とに生ずる膨張変化はそれぞれ中間材9との接合面で
応力が作用することにな9、基板5の熱膨張変化が直接
ガラス体6に伝わることが無くなり、ガラス体6の反り
や位置ずれが緩和されてコリメータ1b、1cに対する
光軸のずれが少々くなる。According to the above configuration, the expansion changes that occur in the substrate 5 and the glass body 6 due to temperature changes are caused by stress acting on the joint surfaces with the intermediate material 9, respectively, and the thermal expansion changes of the substrate 5 are directly caused by the glass body The light is no longer transmitted to the glass body 6, the warpage and positional deviation of the glass body 6 are alleviated, and the deviation of the optical axis with respect to the collimators 1b and 1c is slightly reduced.
以上詳細に説明した本発明によると、基板とガラス体と
の間に、基板とガラス体の中間の熱膨張係数を有する中
間材を入れて一体に固定したことによシ、温度変化に対
してガラス体と基板との間で熱応力が直接動らかず、中
間材との接合面でそれぞれの熱応力が作用することにな
シ、その結果ガラス体の反りや位置ずれが少なくなって
コリメータに対する光軸のずれは緩和されて結合損失が
小さくなる効果を有する。According to the present invention described in detail above, an intermediate material having a coefficient of thermal expansion between that of the substrate and the glass body is inserted between the substrate and the glass body and fixed together, thereby making it possible to resist temperature changes. Thermal stress does not move directly between the glass body and the substrate, and each thermal stress acts on the joint surface with the intermediate material, resulting in less warpage and misalignment of the glass body, and This has the effect of reducing the optical axis misalignment and reducing coupling loss.
また、熱応力の作用が少ないためにガラス体がはがれる
ようなこともなくなり信頼性の高い光合分波器となる効
果を有する。Furthermore, since the effect of thermal stress is small, the glass body does not peel off, resulting in a highly reliable optical multiplexer/demultiplexer.
第1図は本発明の一実施例を示す平面図、第2図は側面
図、第3図は従来例の平面図、第4図は側面図である。
Ia、1b、1c・・・コリメータ 5・・・基板6・
・ガラス体 7a、 γb・・・干渉膜フィルタ 8
・・・反射ミラー 9・・・中間材
本発明の一実施例の平面図
本発明の一実施例の側面図
輔 2 亘FIG. 1 is a plan view showing an embodiment of the present invention, FIG. 2 is a side view, FIG. 3 is a plan view of a conventional example, and FIG. 4 is a side view. Ia, 1b, 1c... Collimator 5... Substrate 6.
・Glass body 7a, γb...Interference film filter 8
... Reflection mirror 9 ... Intermediate material Plan view of one embodiment of the present invention Side view of one embodiment of the present invention 2.
Claims (1)
、このコリメータに光軸が一致するように上記基板に取
付けた合波・分波機能を有するガラス体とより成る光合
分波器において、 ガラス体と基板との間にガラス体の熱膨張係数と基板の
熱膨張係数との中間の熱膨張係数を有する中間材を介在
させて一体に固定したことを特徴とする光合分波器。[Claims] 1. Optical combining/splitting device consisting of a collimator attached to a substrate to create a parallel beam, and a glass body having a multiplexing/demultiplexing function attached to the substrate so that the optical axis coincides with the collimator. An optical combining device characterized in that a glass body and a substrate are fixed together by interposing an intermediate material having a thermal expansion coefficient intermediate between that of the glass body and that of the substrate. Wave equipment.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21510585A JPS6275502A (en) | 1985-09-30 | 1985-09-30 | Optical multiplexer/demultiplexer |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21510585A JPS6275502A (en) | 1985-09-30 | 1985-09-30 | Optical multiplexer/demultiplexer |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6275502A true JPS6275502A (en) | 1987-04-07 |
Family
ID=16666833
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21510585A Pending JPS6275502A (en) | 1985-09-30 | 1985-09-30 | Optical multiplexer/demultiplexer |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6275502A (en) |
-
1985
- 1985-09-30 JP JP21510585A patent/JPS6275502A/en active Pending
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