JPH08227055A - Method for joining optical isolator parts - Google Patents
Method for joining optical isolator partsInfo
- Publication number
- JPH08227055A JPH08227055A JP3395195A JP3395195A JPH08227055A JP H08227055 A JPH08227055 A JP H08227055A JP 3395195 A JP3395195 A JP 3395195A JP 3395195 A JP3395195 A JP 3395195A JP H08227055 A JPH08227055 A JP H08227055A
- Authority
- JP
- Japan
- Prior art keywords
- holding member
- optical
- solder
- joined
- optical parts
- 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.)
- Granted
Links
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、光アイソレータに組み
込まれる部品の接合方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method of joining components incorporated in an optical isolator.
【0002】[0002]
【従来の技術】光通信システム等では、レーザ光源から
発振した伝送光が光通信路中の各種の光伝送部品の入射
面等で反射し、その反射光がレーザ光源まで達すること
がある。反射光は光源の発光作用を乱し、しばしばノイ
ズを生じさせる。光アイソレータは光源と光伝送部品と
の間に設置され、伝送部品の方向に進む光だけを透過さ
せ、光源方向に向かう反射光を選択的に遮断する。2. Description of the Related Art In an optical communication system or the like, transmitted light oscillated from a laser light source may be reflected by an incident surface of various optical transmission components in an optical communication path and the reflected light may reach the laser light source. The reflected light disturbs the light emitting action of the light source and often causes noise. The optical isolator is installed between the light source and the optical transmission component, transmits only the light traveling in the direction of the transmission component, and selectively blocks the reflected light traveling in the direction of the light source.
【0003】光アイソレータの性能を向上させるには、
内部に組み込まれている偏光子等の光学部品が強く接合
されなければならない。光学部品は樹脂系接着剤で接合
されていたが、接着剤が光アイソレータの温度上昇や外
部の温度変化により膨張するため、接合部がずれてしま
うことがある。このため樹脂系接着剤の替わりに、半田
や低融点ガラスが接合剤として広く利用されている。光
学部品の表面には、半田等の接合が容易に行なえるよう
に金属膜が形成されている。To improve the performance of an optical isolator,
Optical components such as polarizers incorporated inside must be strongly bonded. The optical components were bonded with a resin adhesive, but the adhesive expands due to the temperature rise of the optical isolator and the temperature change of the outside, so that the joint may be displaced. Therefore, solder or low-melting glass is widely used as a bonding agent instead of the resin adhesive. A metal film is formed on the surface of the optical component so that solder or the like can be easily joined.
【0004】[0004]
【発明が解決しようとする課題】光アイソレータを組み
立てる際には、各光学部品同士を半田等で接合した後、
保持部材で各光学部品、例えば偏光子、検光子を保持す
る。具体的には、光学部品同士の接合と同様、保持部材
と各光学部品とを半田付けする。半田付け終了後、保持
部材と光学部品とは室温まで冷やされて共に収縮する
が、熱膨張係数が異なるため収縮する割合がそれぞれ異
なる。この収縮の違いによって生じた歪みが光学部品の
方に集中し、接合後の光学部品の消光性能が低下してし
まう。低融点ガラスを接合剤とした場合も、光学部品の
消光性能は同様に低下する。When assembling the optical isolator, after joining the optical components to each other with solder or the like,
A holding member holds each optical component such as a polarizer and an analyzer. Specifically, the holding member and each optical component are soldered as in the case of joining the optical components. After the soldering is completed, the holding member and the optical component are cooled to room temperature and shrink together. However, since the thermal expansion coefficients are different, the shrinkage ratios are different. The distortion caused by this difference in contraction is concentrated on the optical component, and the extinction performance of the optical component after bonding is deteriorated. Even when a low melting point glass is used as the bonding agent, the extinction performance of the optical component is similarly deteriorated.
【0005】本発明は、前記の課題を解決するためにな
されたもので、光学部品の消光性能を低下させずに、光
学部品とその保持部材とを接合する方法を提供すること
を目的とする。The present invention has been made to solve the above problems, and an object of the present invention is to provide a method for joining an optical component and its holding member without deteriorating the extinction performance of the optical component. .
【0006】[0006]
【課題を解決するための手段】前記の目的を達成するた
めになされた本発明の光アイソレータ部品の接合方法
は、光アイソレータ部品である光学部品とその保持部材
とを、半田または低融点ガラスで接合し、半田または低
融点ガラスの融点より5℃〜100℃低い温度で1時間
〜5時間にわたって接合体を加熱した後、接合体を室温
まで徐々に冷却する方法である。In order to achieve the above-mentioned object, a method of joining optical isolator parts according to the present invention comprises an optical part which is an optical isolator part and a holding member for the optical isolator part by soldering or low melting point glass. This is a method of joining and heating the bonded body at a temperature 5 ° C. to 100 ° C. lower than the melting point of solder or low melting point glass for 1 hour to 5 hours, and then gradually cooling the bonded body to room temperature.
【0007】加熱する温度が前記温度範囲より低い場合
には、接合後の光学部品の消光性能が低下してしまい、
前記温度範囲より高い場合には、半田や低融点ガラスが
再溶解してしまう。加熱時間が1時間未満の場合には、
接合後の光学部品の消光性能が低下してしまい、5時間
を超える場合には、長く加熱しただけの効果が発揮され
ない。If the heating temperature is lower than the above temperature range, the extinction performance of the optical component after bonding will deteriorate,
If the temperature is higher than the above temperature range, the solder and the low melting point glass will be remelted. If the heating time is less than 1 hour,
The extinction performance of the optical component after bonding is deteriorated, and if it exceeds 5 hours, the effect of merely heating for a long time is not exhibited.
【0008】[0008]
【作用】保持部材1と光学部品2とは、熱によって溶融
した半田3が冷えて固まることによって接合される。通
常、保持部材1の方が光学部品2より熱膨張係数が高い
ため、冷却によって生じる収縮は保持部材1の方が大き
い。収縮が異なる場合には、強度的に弱い光学部品2に
歪みが集中し、光学部品2の消光性能が低下する。光学
部品2と保持部材1とを接合し、得られた接合体を、特
定の温度で一定時間加熱してから室温まで徐々に冷却す
ると、各部品1・2の収縮が緩やかになるため歪みが発
生しにくくなり、光学部品2の消光性能の低下が防止さ
れる。The holding member 1 and the optical component 2 are joined by the solder 3 melted by heat being cooled and solidified. Generally, the holding member 1 has a higher coefficient of thermal expansion than the optical component 2, so that the holding member 1 has a larger shrinkage caused by cooling. When the contraction is different, the strain is concentrated on the optical component 2 which is weak in strength, and the extinction performance of the optical component 2 is deteriorated. When the optical component 2 and the holding member 1 are joined, and the obtained joined body is heated at a specific temperature for a certain period of time and then gradually cooled to room temperature, the shrinkage of each of the components 1 and 2 becomes gradual, so that distortion occurs. It is less likely to occur, and deterioration of the extinction performance of the optical component 2 is prevented.
【0009】[0009]
【実施例】以下、本発明の実施例を説明する。図1は本
発明の接着方法で得られた接合体の一実施例を示す断面
図である。同図に示されるように、光学部品2は半田3
によって保持部材1と接合している。保持部材1の開口
部分4は光路となっている。得られた接合体は光アイソ
レータを構成する部品となる。Embodiments of the present invention will be described below. FIG. 1 is a sectional view showing an embodiment of a bonded body obtained by the bonding method of the present invention. As shown in the figure, the optical component 2 is solder 3
Is joined to the holding member 1. The opening portion 4 of the holding member 1 serves as an optical path. The obtained bonded body becomes a component that constitutes an optical isolator.
【0010】光学部品2と保持部材1とを接合する工程
を以下に説明する。半田3は組成が金80%、錫20
%、融点280℃のAu80−Sn20、光学部品2は
偏光ガラス(コーニング社製)、保持部材1はステンレ
ス材(SUS 304)である。SUS 304の表面
には、半田付け用の金属膜として金がメッキされてい
る。Au80−Sn20によって偏光ガラスとSUS
304とを接合し、得られた接合体を加熱し、徐々に室
温まで冷却する。The process of joining the optical component 2 and the holding member 1 will be described below. Solder 3 has a composition of 80% gold and 20 tin.
%, Au80-Sn20 having a melting point of 280 ° C., the optical component 2 is a polarizing glass (made by Corning Incorporated), and the holding member 1 is a stainless steel material (SUS 304). The surface of SUS 304 is plated with gold as a metal film for soldering. Polarized glass and SUS by Au80-Sn20
304 is joined, the obtained joined body is heated, and gradually cooled to room temperature.
【0011】具体的な接合方法は以下の通りである。S
US 304に、予めAu80−Sn20を配置してお
き、偏光ガラスをSUS 304にはめ込んだ後、接合
部分を300℃以上の温度で加熱する。加熱終了後、溶
融していたAu80−Sn20が冷えて固まり、偏光ガ
ラスとSUS 304とは接合する。得られた接合体を
加熱炉の中に入れたまま260℃で3時間加熱し、2時
間かけて室温まで徐々に冷却した。The specific joining method is as follows. S
Au80-Sn20 is arranged in advance in US 304, the polarizing glass is fitted in SUS 304, and then the bonded portion is heated at a temperature of 300 ° C. or higher. After heating, the melted Au80-Sn20 is cooled and solidified, and the polarizing glass and SUS 304 are bonded. The obtained joined body was heated in a heating furnace at 260 ° C. for 3 hours and gradually cooled to room temperature over 2 hours.
【0012】接合体の温度が室温まで下がったら偏光ガ
ラスの消光比を測定し、加熱前の消光比と比較した。そ
の結果を図2に示す。図中の白ぬきのプロットは、保持
部材1がSUS 304の場合の偏光ガラスの消光比で
ある。同図に示されるように、加熱前の消光比が34.
5dBであった偏光ガラスは、高温保持徐冷されること
でその消光比が49.0dBに向上した。When the temperature of the bonded body fell to room temperature, the extinction ratio of the polarizing glass was measured and compared with the extinction ratio before heating. The result is shown in FIG. The white plot in the figure is the extinction ratio of the polarizing glass when the holding member 1 is SUS 304. As shown in the figure, the extinction ratio before heating is 34.
The extinction ratio of the polarizing glass, which was 5 dB, was improved to 49.0 dB by holding it at a high temperature and gradually cooling it.
【0013】保持部材1をコバールとし、コバールと偏
光ガラスとをAu80−Sn20で接合し、得られた接
合体を260℃で3時間加熱してから、2時間かけて室
温まで徐々に冷却した。加熱終了後に偏光ガラスの消光
比を測定し、加熱前の消光比と比較した。その結果を図
2に示す。図中の黒ぬきのプロットは、保持部材1がコ
バールの場合の偏光ガラスの消光比である。同図に示さ
れるように、加熱前に消光比が38.0dBであった偏
光ガラスは、高温保持徐冷されることでその消光比が5
0.0dBに向上した。The holding member 1 was Kovar, and Kovar and the polarizing glass were joined with Au80-Sn20, and the obtained joined body was heated at 260 ° C. for 3 hours and then gradually cooled to room temperature over 2 hours. The extinction ratio of the polarizing glass was measured after completion of heating and compared with the extinction ratio before heating. The result is shown in FIG. The black plot in the figure is the extinction ratio of the polarizing glass when the holding member 1 is Kovar. As shown in the figure, the extinction ratio of the polarizing glass which was 38.0 dB before heating was maintained at high temperature and gradually cooled, so that the extinction ratio was 5%.
It improved to 0.0 dB.
【0014】[0014]
【発明の効果】以上、詳細に説明したように、本発明の
光学部品の接合方法によると、保持部材と接合した光学
部品の消光性能は、接合前より向上している。得られた
接合体が内部に組み込まれた光アイソレータは高性能で
あり、光通信システム等でノイズの発生を効率的に防止
することができる。As described above in detail, according to the optical component joining method of the present invention, the extinction performance of the optical component joined to the holding member is improved as compared with that before joining. The optical isolator in which the obtained bonded body is incorporated has high performance and can effectively prevent the generation of noise in an optical communication system or the like.
【図1】本発明の接着方法で得られた接合体の一実施例
を示す断面図である。FIG. 1 is a cross-sectional view showing an example of a bonded body obtained by a bonding method of the present invention.
【図2】偏光ガラスの加熱前の消光比と、加熱後の消光
比との関係を示す図である。FIG. 2 is a diagram showing a relationship between an extinction ratio of a polarizing glass before heating and an extinction ratio after heating.
1は保持部材、2は光学部品、3は半田、4は開口部で
ある。Reference numeral 1 is a holding member, 2 is an optical component, 3 is solder, and 4 is an opening.
フロントページの続き (72)発明者 流王 俊彦 群馬県安中市磯部2丁目13番1号 信越化 学工業株式会社精密機能材料研究所内Front page continuation (72) Inventor Toshihiko Nagao 2-13-1, Isobe, Annaka-shi, Gunma Shin-Etsu Chemical Co., Ltd. Precision Materials Research Laboratory
Claims (1)
の保持部材とを、半田または低融点ガラスで接合し、該
半田または低融点ガラスの融点より5℃〜100℃低い
温度で1時間〜5時間にわたって接合体を加熱した後、
該接合体を室温まで徐々に冷却することを特徴とする光
アイソレータ部品の接合方法。1. An optical component, which is an optical isolator component, and a holding member thereof are joined together by solder or low melting point glass, and at a temperature 5 ° C. to 100 ° C. lower than the melting point of the solder or low melting point glass for 1 hour to 5 hours. After heating the conjugate over
A method of joining optical isolator parts, characterized in that the joined body is gradually cooled to room temperature.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03395195A JP3600297B2 (en) | 1995-02-22 | 1995-02-22 | Joining method of optical isolator parts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP03395195A JP3600297B2 (en) | 1995-02-22 | 1995-02-22 | Joining method of optical isolator parts |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH08227055A true JPH08227055A (en) | 1996-09-03 |
JP3600297B2 JP3600297B2 (en) | 2004-12-15 |
Family
ID=12400815
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP03395195A Expired - Fee Related JP3600297B2 (en) | 1995-02-22 | 1995-02-22 | Joining method of optical isolator parts |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3600297B2 (en) |
-
1995
- 1995-02-22 JP JP03395195A patent/JP3600297B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
JP3600297B2 (en) | 2004-12-15 |
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