JPH01248112A - Light emitting element module - Google Patents
Light emitting element moduleInfo
- Publication number
- JPH01248112A JPH01248112A JP7443788A JP7443788A JPH01248112A JP H01248112 A JPH01248112 A JP H01248112A JP 7443788 A JP7443788 A JP 7443788A JP 7443788 A JP7443788 A JP 7443788A JP H01248112 A JPH01248112 A JP H01248112A
- Authority
- JP
- Japan
- Prior art keywords
- holder
- emitting element
- light emitting
- optical
- cap
- 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 claims abstract description 36
- 239000000696 magnetic material Substances 0.000 claims abstract description 14
- 239000013307 optical fiber Substances 0.000 claims abstract description 11
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 3
- 239000010931 gold Substances 0.000 claims description 3
- 229910052737 gold Inorganic materials 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 238000005476 soldering Methods 0.000 claims 1
- 229910000679 solder Inorganic materials 0.000 abstract description 23
- 239000004065 semiconductor Substances 0.000 abstract description 12
- POIUWJQBRNEFGX-XAMSXPGMSA-N cathelicidin Chemical compound C([C@@H](C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CO)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H]([C@@H](C)CC)C(=O)NCC(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](C(C)C)C(=O)N[C@@H](CCC(N)=O)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)CC)C(=O)N[C@@H](CCCCN)C(=O)N[C@@H](CC(O)=O)C(=O)N[C@@H](CC=1C=CC=CC=1)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H](CC(N)=O)C(=O)N[C@@H](CC(C)C)C(=O)N[C@@H](C(C)C)C(=O)N1[C@@H](CCC1)C(=O)N[C@@H](CCCNC(N)=N)C(=O)N[C@@H]([C@@H](C)O)C(=O)N[C@@H](CCC(O)=O)C(=O)N[C@@H](CO)C(O)=O)NC(=O)[C@H](CC=1C=CC=CC=1)NC(=O)[C@H](CC(O)=O)NC(=O)CNC(=O)[C@H](CC(C)C)NC(=O)[C@@H](N)CC(C)C)C1=CC=CC=C1 POIUWJQBRNEFGX-XAMSXPGMSA-N 0.000 abstract description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 4
- 230000003068 static effect Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229910000833 kovar Inorganic materials 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 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
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
- G02B6/4208—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback using non-reciprocal elements or birefringent plates, i.e. quasi-isolators
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
〔発明の目的〕
（産業上の利用分野）
この発明は、光アイソレータ素子を内蔵した発光素子モ
ジュールに関する。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application Field) The present invention relates to a light emitting element module incorporating an optical isolator element.
（従来の技術）
近年、光通信分野においては、伝送速度がギガピクト以
上の伝送装置が開発されつつあシ、この伝送装置に使用
される発光素子モジュールとして、半纏体レーザ、例え
ば分布帰還形半導体レーザ（ＤＦＢレーザ）を発光素子
とした発光素子モジュールが用いられる。(Prior Art) In recent years, in the field of optical communications, transmission devices with transmission speeds of Gigapictures or higher have been developed.Semiconductor lasers, such as distributed feedback semiconductor lasers, are being used as light-emitting element modules used in these transmission devices. A light emitting element module using a (DFB laser) as a light emitting element is used.
半導体レーザを発光素子とした場合、反射もどり光によ
り半導体レーザ出射光に雑音が発生するとともに、波長
変動も発生し、ギガビット以上の伝送装置においては、
伝送特性の劣化をきたす。反射もどり光を抑圧する手段
としては、一般的に光アイソレータを発光素子モジュー
ルに内蔵し、半導体レーザに反射もどり光をもどさない
構成が採られる。When a semiconductor laser is used as a light emitting element, the reflected light causes noise in the semiconductor laser emitted light, as well as wavelength fluctuations.
This causes deterioration of transmission characteristics. As means for suppressing the reflected light, an optical isolator is generally built into the light emitting element module to prevent the reflected light from returning to the semiconductor laser.
第２図に代表的な光アイソレータ内蔵発光素子モジ−−
ルの構成を示す。１は電気信号入出力用リード、２は半
導体レーザ固定用ステム、３は半導体レーザの出射光電
力検出用光検出器、４は半導体レーザ、５は第１の光学
レンズ、６はキャップ、７はガラス窓、８は永久磁石、
９はファラデー回転子、１０は第２の光学レンズ、１１
は非磁性材料の第１のホルダ、１２は偏光子、１３はフ
ェルール、１４は非磁性材料の第２のホルダ、１５は光
ファイバ、１６．１７は第１．第２のホルダ半田固定部
である。このように構成された発光素子で
モジュールは、１５の光ファイバにシングルモード光フ
ァイバを用いた場合、半導体レーザ４の光軸に対して光
ファイバ１５が数ミクロン最適調整、固定後に軸ずれす
ると光ファイバ１５への光結合効率が大幅に劣化する。Figure 2 shows a typical light-emitting element module with a built-in optical isolator.
The configuration of the file is shown below. 1 is a lead for electrical signal input/output, 2 is a stem for fixing a semiconductor laser, 3 is a photodetector for detecting the power of the output light of the semiconductor laser, 4 is a semiconductor laser, 5 is a first optical lens, 6 is a cap, and 7 is a Glass window, 8 is a permanent magnet,
9 is a Faraday rotator, 10 is a second optical lens, 11
12 is a polarizer, 13 is a ferrule, 14 is a second holder made of nonmagnetic material, 15 is an optical fiber, and 16.17 is a first holder made of nonmagnetic material. This is the second holder solder fixing part. In the module with the light emitting element configured in this way, when a single mode optical fiber is used as the optical fiber 15, if the optical fiber 15 deviates by a few microns from the optical axis of the semiconductor laser 4 after being optimally adjusted and fixed, the light will emit light. The optical coupling efficiency to the fiber 15 is significantly degraded.
軸ずれ要因として、温度変動、半田固定部１６．１７の
半田クリープ特性によるものがある。特に半田クリープ
特性による軸ズレは、経時的に発生し、光通信システム
構成上対応が困難である。半田クリープ特性とは、固定
用半日に静荷重を加えたとき、ある温度以上で塑性変形
を示す現象で、歪量は時間の関数である。The axis misalignment factors include temperature fluctuations and solder creep characteristics of the solder fixing parts 16 and 17. In particular, axis misalignment due to solder creep characteristics occurs over time and is difficult to deal with in terms of optical communication system configuration. Solder creep characteristics are a phenomenon in which plastic deformation occurs above a certain temperature when a static load is applied to a fixing half-day, and the amount of strain is a function of time.
第３図に静荷重、温度をパラメータとした半田クリープ
特性を示す。例えば、第３図から判る通り２μｍの歪量
が発生するまでの時間は、１９１６０℃で２×１０時間
、１０ｇ、６０℃で１０４時間である。Figure 3 shows the solder creep characteristics using static load and temperature as parameters. For example, as can be seen from FIG. 3, the time required to generate a strain of 2 μm is 2×10 hours at 19160° C., 104 hours at 10 g and 60° C.
光アイソレータ素子を内蔵した発光素子モジ−一ルでは
、永久磁石８、ファラデー回転子９が第１のホルダ１１
内に内蔵されるため、ホルダ固定用半田１６にアイソレ
ータ素子を内蔵しない発光素子モジュールよりも過大な
靜荷１がかかり、半田クリープ特性による軸ずれ量が大
きく、光結合効率の劣化速度が速まり光通信システムに
重大な支障をきたす。In a light emitting element module incorporating an optical isolator element, a permanent magnet 8 and a Faraday rotator 9 are placed in a first holder 11.
Since the isolator element is built in, the holder fixing solder 16 is subjected to an excessive load 1 than a light emitting element module that does not have an isolator element built in, resulting in a large amount of axial misalignment due to solder creep characteristics, which accelerates the rate of deterioration of optical coupling efficiency. This will cause serious trouble to optical communication systems.
（発明が解決しようとする課題）
本発明は、半田固定部の半田クリープ特性による軸ずれ
を大幅獄吏なくすることが可能な光アイソレータ内蔵発
光素子モジ為−ルを提供することを目的とする。(Problems to be Solved by the Invention) An object of the present invention is to provide a light emitting element module with a built-in optical isolator that can significantly eliminate axis misalignment due to solder creep characteristics of a solder fixing part.
（１１題を解決する為の手段）
前項の問題点を解決するため、気脣用窓を備えたキャッ
プ、光学レンズ、光アイソレータ素子を固定するホルダ
、光ファイバを固定するホルダを全て磁性材料により製
作した光アイソレータ素子内蔵発光素子モジュールであ
る。(Means for solving problem 11) In order to solve the problem in the previous section, the cap with the window, the optical lens, the holder for fixing the optical isolator element, and the holder for fixing the optical fiber are all made of magnetic material. This is the manufactured light-emitting element module with built-in optical isolator element.
（作 用）
光アイソレータ素子の構成部品である磁石の吸引力を用
いるべく、前記したキャップ、ホルダの材料を磁性体と
することにより、各ホルダは、各々吸着され、半田固定
を施しても固定部への静荷重は大幅に低減でき、半田ク
リープ特性による軸ずれを大幅に少なくする事が可能で
ある。(Function) In order to use the attractive force of the magnet, which is a component of the optical isolator element, by using magnetic materials for the cap and holder, each holder is attracted to each other and remains fixed even when soldered. The static load on the parts can be significantly reduced, and axial misalignment due to solder creep characteristics can be significantly reduced.
（実施例）
本発明の実施例を第１図に示す。尚、第２図の従来例と
同一部分には同−符号付している。気密用窓を備えた磁
性体材料によυ形成したキャップ１８と、永久磁石８、
ファラデー回転子９、第２の光学レンズ１０、を内蔵、
固定する磁性体材料によυ形成した第１のホルダ１９と
、偏光子１２、フェルール１３を固定する磁性体材料に
よシ形成した第２のホルダ２０を備え、半導体レーザ４
からの出射光電力を効率よく光ファイバ１５に光結合す
ヘキ第１の光学レンズ５、第１のホルダ１９、第２のホ
ルダ２０を各々光軸調整したのち半田によシ固定する。(Example) An example of the present invention is shown in FIG. Note that the same parts as in the conventional example shown in FIG. 2 are given the same reference numerals. a cap 18 formed of a magnetic material with an airtight window; a permanent magnet 8;
Built-in Faraday rotator 9, second optical lens 10,
A first holder 19 made of a magnetic material to fix the polarizer 12 and a second holder 20 made of a magnetic material to fix the polarizer 12 and the ferrule 13.
The first optical lens 5, the first holder 19, and the second holder 20 are fixed with solder after adjusting their optical axes.
このとき、第１のホルダ１９内に内蔵した光アイソレー
タ素子の構成部品である永久磁石８の吸引力によって第
１のホルダ１９は磁性体材料で形成したキャップ１８に
吸着される。At this time, the first holder 19 is attracted to the cap 18 made of a magnetic material by the attractive force of the permanent magnet 8, which is a component of the optical isolator element built into the first holder 19.
また、第２のホルダ２０も同様に磁性体材料で形成した
第１のホルダ１９に吸着される。Further, the second holder 20 is similarly attracted to the first holder 19 made of a magnetic material.
これによって、キャップ１８と第１のホルダ１９の第１
のホルダ半田固定部１６、第１のホルダ１９と第２のホ
ルダ２０の第２のホルダ半田固定部１７への静荷重の大
半を吸着力によって低減でき、半田クリープ特性による
経時的な軸ずれ量を大幅に低減することができ、光ファ
イバ１５への光結合効率劣化を抑圧する事が可能である
。磁性体材料については、鉄系の材料例えば、コバール
、鉄又は磁性体のステンレスを使用し、腐食防止、牛田
儒れ性の向上を目的として、メッキ処理例えば、金メッ
キ処理を施すことにより半田固定の確実性向上、耐湿性
の向上を計ることが出来る。This allows the cap 18 and the first holder 19 to
Most of the static loads on the holder solder fixing part 16 and the second holder solder fixing part 17 of the first holder 19 and the second holder 20 can be reduced by the adsorption force, and the amount of axis misalignment over time due to solder creep characteristics can be reduced. can be significantly reduced, and deterioration in optical coupling efficiency to the optical fiber 15 can be suppressed. Regarding magnetic materials, use iron-based materials such as Kovar, iron, or magnetic stainless steel, and apply a plating treatment, such as gold plating, to prevent solder fixation for the purpose of preventing corrosion and improving elasticity. It is possible to improve reliability and moisture resistance.
また、各々のホルダを吸着させるための永久磁石として
光アイソレータ素子構成部品の永久磁石を使用するため
部品数の増加にはならない。Furthermore, since the permanent magnets of the optical isolator element components are used as permanent magnets for attracting each holder, the number of parts does not increase.
本発明に関しては、前述の実施例に限定されず、種々変
形が可能である。前述の実施例では、２つの光学レンズ
による光結合系であるが、１つの光学レンズ光結合系に
ついても適用可能である。The present invention is not limited to the above-described embodiments, and various modifications are possible. In the above-mentioned embodiment, the optical coupling system includes two optical lenses, but it is also applicable to a single optical lens optical coupling system.
また、光アイソレータの構成についても、ファラデー回
転子の前（半導体レーザ側）に検光子を備えても何等支
障はない。また、キャップ、ホルダの形状、大きさ及び
磁性体材料についても限定されない。Furthermore, regarding the configuration of the optical isolator, there is no problem in providing an analyzer in front of the Faraday rotator (on the semiconductor laser side). Furthermore, the shape, size, and magnetic material of the cap and holder are not limited.
要するに本発明は、その要旨を免税しない範囲で種々変
形して実施することができる。In short, the present invention can be implemented with various modifications without departing from the gist thereof.
本発明によれば、以上説明したように、キャップ、ホル
ダを磁性体材料で形成するのみで、元アイソレータ素子
の構成部品である永久磁石の吸引力を利用して、キャッ
プとホルダ、ホルダとホルダを吸着させ半田固定するこ
とによシ、半田クリープ特性による固定部の軸ずれを大
幅窓低減することが可能であるとともに、構成部品の増
加も次く、経時的に安定な光アイルレータ素子内蔵発光
素子モジュールを提供できる。According to the present invention, as explained above, by simply forming the cap and holder with a magnetic material, the cap and holder, and the holder and holder By adsorbing and fixing with solder, it is possible to significantly reduce the axis misalignment of the fixed part due to solder creep characteristics, and the number of component parts increases. It can provide element modules.
第１図は本発明のアイソレータ素子内蔵発光素子モジ−
−ルの実施例の構成図、第２図は従来のアイソレータ素
子内蔵発光素子モジ−−ルの構成図、第３図は半田クレ
ープ特性を示す図である。
３・・・・・・・・・光検出器
４・・・・・・・・・半導体レーザ
５・・・・・・・・・第１の光学レンズ８゛°°”°°
°°永久磁石
９・・・・・・・・・ファラデー回転子１ｏ・・・・・
・・・・第２の光学レンズ１９°°°゛°゛°°°磁性
体材料の第１のホルダ１２°・°“°“°°°偏光子
１３°゛゛°°゛°°フエ′−′
１６、１７ °゛°°゛°°°°半田固定部１８・・
・・・・・・・キャップ
１５°°°°°°°°゛光フアイバFigure 1 shows a light emitting device module with a built-in isolator element according to the present invention.
2 is a block diagram of a conventional light emitting element module with a built-in isolator element, and FIG. 3 is a diagram showing solder crepe characteristics. 3...Photodetector 4...Semiconductor laser 5...First optical lens 8゛°°"°°
°°Permanent magnet 9...Faraday rotator 1o...
...Second optical lens 19°°°゛°゛°°°First holder made of magnetic material 12°・°"°"°°°Polarizer 13°゛゛°°゛°°F'- ' 16, 17 °゛°°゛°°°° Solder fixing part 18...
・・・・・・Cap 15°°°°°°°°゛Optical fiber
Claims (4)
ャップ内に実装され、前記発光素子からの出射光を光フ
ァイバに光結合するための少なくとも１つの光学レンズ
と光アイソレータ素子を、前記発光素子と前記光ファイ
バの間に備えた発光素子モジュールにおいて、前記気密
用窓を備えたキャップ、前記光学レンズ、光アイソレー
タ素子を固定する第１のホルダ部材、前記光ファイバを
固定する第２のホルダ部材を、全て磁性体材料で形成し
たことを特徴とする発光素子モジュール。(1) a light emitting element; the light emitting element is mounted in a cap provided with an airtight window; and at least one optical lens and an optical isolator element for optically coupling emitted light from the light emitting element to an optical fiber; In the light emitting element module provided between the light emitting element and the optical fiber, the cap provided with the airtight window, the optical lens, a first holder member for fixing the optical isolator element, and a second holder member for fixing the optical fiber. A light emitting element module characterized in that the holder member is entirely made of a magnetic material.
同士を半田付け固定したことを特徴とする請求項１記載
の発光素子モジュール。(2) The light emitting element module according to claim 1, wherein the cap, the first holder member, and the second holder member are fixed to each other by soldering.
に少なくとも一層の金メッキを施こしたことを特徴とす
る請求項１記載の発光素子モジュール。(3) The light emitting element module according to claim 1, wherein the cap, the first holder member, and the second holder member are plated with at least one layer of gold.
に施こした金メッキ層の下層に少なくとも一層のバッフ
ァ層を施こしたことを特徴とする請求項１記載の発光素
子モジュール。(4) The light emitting element module according to claim 1, characterized in that at least one buffer layer is applied below the gold plating layer applied to the cap, the first holder member, and the second holder member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7443788A JPH01248112A (en) | 1988-03-30 | 1988-03-30 | Light emitting element module |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7443788A JPH01248112A (en) | 1988-03-30 | 1988-03-30 | Light emitting element module |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01248112A true JPH01248112A (en) | 1989-10-03 |
Family
ID=13547200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7443788A Pending JPH01248112A (en) | 1988-03-30 | 1988-03-30 | Light emitting element module |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01248112A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03132619A (en) * | 1989-10-18 | 1991-06-06 | Matsushita Electric Ind Co Ltd | Semiconductor laser device and its manufacture |
-
1988
- 1988-03-30 JP JP7443788A patent/JPH01248112A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03132619A (en) * | 1989-10-18 | 1991-06-06 | Matsushita Electric Ind Co Ltd | Semiconductor laser device and its manufacture |
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