JP2835384B2 - Optical fiber connector for high power laser light - Google Patents
Optical fiber connector for high power laser lightInfo
- Publication number
- JP2835384B2 JP2835384B2 JP1287215A JP28721589A JP2835384B2 JP 2835384 B2 JP2835384 B2 JP 2835384B2 JP 1287215 A JP1287215 A JP 1287215A JP 28721589 A JP28721589 A JP 28721589A JP 2835384 B2 JP2835384 B2 JP 2835384B2
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- laser light
- power laser
- temperature
- adapter
- 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 - Lifetime
Links
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
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3825—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres with an intermediate part, e.g. adapter, receptacle, linking two plugs
-
- 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
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3847—Details of mounting fibres in ferrules; Assembly methods; Manufacture with means preventing fibre end damage, e.g. recessed fibre surfaces
Landscapes
- Mechanical Coupling Of Light Guides (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は大出力レーザ光用光ファイバ接続器に関す
る。Description: TECHNICAL FIELD The present invention relates to an optical fiber connector for high-power laser light.
従来、大出力レーザ光用光ファイバは、一般にコア径
150〜1250μｍのものが用いられ、その長さ寸法は約200
mが限定であり、その長さを越えて使用する場合は、光
ファイバ同士を融着接続していた。Conventionally, optical fibers for high-power laser light generally have a core diameter
150 to 1250 μm is used and its length is about 200
When the length m is limited and the length of the optical fiber exceeds the length, the optical fibers are fusion-spliced.
しかして、大出力レーザ光を伝送する光ファイバにお
いては、大出力レーザ光はレンズで集光させて実に105W
/cm2〜1010W/cm2の高エネルギー光となってその端面に
入射されるので、入射端側は早期に損壊する。つまり、
光ファイバを切断してその損壊した部位を交換しなけれ
ばならなかった。従って、早期に損壊する部位を着脱可
能なものとするのが好ましいが、実用に供し得るものは
提案されていなかった。Therefore, in an optical fiber that transmits high-power laser light, the high-power laser light is condensed by a lens and is actually 10 5 W
Since high-energy light of / cm 2 to 10 10 W / cm 2 is incident on the end face, the incident end side is damaged at an early stage. That is,
The optical fiber had to be cut and the damaged part replaced. Therefore, it is preferable that the portion damaged at an early stage can be detached, but a practically usable portion has not been proposed.
そこで、本発明では、光ファイバを第１光ファイバと
第２光ファイバとに分離し、該第１・第２光ファイバを
着脱可能に接続することができ、早期に損壊する部位の
交換を容易とし、しかも、第１・第２光ファイバの接続
部の温度を管理することができ、異常を検出することが
できる大出力レーザ光用光ファイバ接続器を提供するこ
とを目的とする。Therefore, according to the present invention, the optical fiber can be separated into the first optical fiber and the second optical fiber, and the first and second optical fibers can be detachably connected to each other, thereby facilitating replacement of the damaged portion at an early stage. In addition, an object of the present invention is to provide an optical fiber connector for high-power laser light capable of controlling the temperature of the connecting portion between the first and second optical fibers and detecting an abnormality.
〔課題を解決するための手段〕 上述の目的を達成するために、本発明に係る大出力レ
ーザ光用光ファイバ接続器は、大出力レーザ光用の第１
・第２光ファイバを着脱自在に接続すると共に、該第１
・第２光ファイバの接続部の温度を測定する温度測定手
段を設けたものである。[Means for Solving the Problems] In order to achieve the above-mentioned object, an optical fiber connector for high-power laser light according to the present invention comprises:
・ The second optical fiber is detachably connected, and the first
A temperature measuring means for measuring the temperature of the connection portion of the second optical fiber is provided;
第１光ファイバと第２光ファイバとは着脱自在に接続
されるので、第１光ファイバと第２光ファイバのどちら
かが損壊した場合、損壊した光ファイバを交換すること
ができ、また、その接続部の温度を温度測定手段にて測
定することができ、異常発熱等を検出することができ
る。Since the first optical fiber and the second optical fiber are detachably connected, if either the first optical fiber or the second optical fiber is damaged, the damaged optical fiber can be replaced. The temperature of the connection portion can be measured by the temperature measuring means, and abnormal heat generation or the like can be detected.
以下、実施例について図面を参照して説明する。 Hereinafter, embodiments will be described with reference to the drawings.
第１図は本発明に係る大出力レーザ光用光ファイバ接
続器の簡略図を示し、この接続器は、第１光ファイバ１
と第２光ファイバ２とを接続するものであって、第１・
第２光ファイバ1,2の夫々の端部を保持するフェルール
3,4が挿入される円筒状のアダプタ５を、備え、該アダ
プタ５には、温度測定手段６が付設され、第１光ファイ
バ１と第２光ファイバ２との接続部７の温度測定が可能
とされている。FIG. 1 is a simplified view of an optical fiber connector for high-power laser light according to the present invention.
And the second optical fiber 2, and the first optical fiber 2
Ferrules for holding the respective ends of the second optical fibers 1 and 2
It has a cylindrical adapter 5 into which 3 and 4 are inserted, and the adapter 5 is provided with a temperature measuring means 6 for measuring the temperature of the connecting portion 7 between the first optical fiber 1 and the second optical fiber 2. It is possible.
しかして、アダプタ５は、第２図と第３図と第４図に
示す様に、取付台８にて保持され、該取付台８は基盤９
上に立設されている。ここに、取付台８とは、基盤９上
に固着される基板10と、該基板10上に立設される垂直壁
11と、からなり、該垂直壁11には貫通孔12が設けられ、
該貫通孔12にアダプタ５が挿入される。また、垂直壁11
の上面13及び一方の側面14には、貫通孔12に達するねじ
孔15,15が設けられ、該ねじ孔15,15には、固定用ねじ杆
16,16が螺合され、アダプタ５は垂直壁11に固定され
る。なお、17,17はアダプタ５の外周に設けられた凹所
であり、該凹所17,17にねじ杆16,16の先端が嵌合してい
る。Thus, as shown in FIGS. 2, 3, and 4, the adapter 5 is held by the mounting base 8, and the mounting base 8 is
It is erected above. Here, the mounting table 8 is a board 10 fixed on a base 9 and a vertical wall standing on the board 10.
11, the vertical wall 11 is provided with a through hole 12,
The adapter 5 is inserted into the through hole 12. Also vertical wall 11
The upper surface 13 and one side surface 14 are provided with screw holes 15, 15 reaching the through hole 12, and the screw holes 15, 15 have fixing screw rods.
16 and 16 are screwed together, and the adapter 5 is fixed to the vertical wall 11. In addition, 17 and 17 are recesses provided on the outer periphery of the adapter 5, and the tips of the screw rods 16 and 16 are fitted into the recesses 17 and 17.
しかして、アダプタ５は、第５図と第６図に示す様
に、両端外周面にねじ部18,18が設けられ、該ねじ部18,
18に袋ナット19,19のねじ部20,20が螺着される。また、
フェルール3,4には、夫々嵌合体21,22が取付けられ、該
嵌合体21,22の突出片23,23がアダプタ５の両端面に夫々
設けられた切欠凹所24,24に嵌合される。ここで、嵌合
体21,22とは、夫々、円筒部25と外鍔部26とからなる本
体部材27,27と、該本体部材27の円筒部25に外嵌状に一
体化される外嵌部材28,28と、からなり、ボルトにて夫
々のフェルール3,4を固定している。As shown in FIGS. 5 and 6, the adapter 5 is provided with screw portions 18 on the outer peripheral surfaces of both ends.
Screw portions 20, 20 of cap nuts 19, 19 are screwed to 18. Also,
Fittings 21 and 22 are attached to the ferrules 3 and 4, respectively, and projecting pieces 23 and 23 of the fittings 21 and 22 are fitted into cutout recesses 24 and 24 provided on both end surfaces of the adapter 5, respectively. You. Here, the fitting bodies 21 and 22 are respectively body members 27 and 27 each including a cylindrical portion 25 and an outer flange portion 26, and external fittings that are integrated into the cylindrical portion 25 of the body member 27 so as to be externally fitted. The ferrules 3 and 4 are fixed by bolts.
従って、袋ナット19,19を、夫々、アダプタ５のねじ
部18,18に螺着すれば、各袋ナット19,19の外鍔部対応壁
29,29が外鍔部26,26の外面26a,26aに当接し、フェルー
ル3,4の端面32,33が図例の如く当接した状態に保持さ
れ、第１光ファイバと第２光ファイバ２の端面は相互に
突き合わせ状に保持される。なお、この場合、第１光フ
ァイバ１と第２光ファイバ２の端面間に僅かな隙間を設
けるのが好ましい。けだし、発熱しにくく、端面が損傷
することがないからである。Accordingly, if the cap nuts 19, 19 are screwed to the threaded portions 18, 18 of the adapter 5, respectively, the outer flange portion corresponding walls of the cap nuts 19, 19 are formed.
29, 29 are in contact with the outer surfaces 26a, 26a of the outer collar portions 26, 26, and the end surfaces 32, 33 of the ferrules 3, 4 are held in contact as shown in the example of FIG. The two end faces are held against each other. In this case, it is preferable to provide a slight gap between the end faces of the first optical fiber 1 and the second optical fiber 2. This is because heat is hardly generated and the end face is not damaged.
ここに、アダプタ５は、内部発熱を生じた場合、すば
やく放熱させる為、その材質としては、銅、アルミニウ
ム、黄銅等の熱伝導率の大きい金属を用いている。但
し、フェルール3,4の挿入部（孔部）は、摩耗等による
損傷を軽減すべくステンレス等の硬質の材料を用いて、
内径側と外径側とでは材質が相違する２重構造としてい
る。あるいは、フェルール3,4の挿入部（孔部）の内面
を、アルマイト処理等で表面硬度をあげれば、同一材で
あっても良い。また、取付台８は、アダプタ５を安定し
た状態で保持すると共に、該アダプタ５に対して放熱作
用をなすものであるので、その材質としては、アルミニ
ウム等の熱伝導率が大きい金属を用いている。Here, the adapter 5 is made of a metal having a high thermal conductivity such as copper, aluminum, brass or the like in order to quickly radiate heat when internal heat is generated. However, the insertion portions (holes) of the ferrules 3 and 4 are made of a hard material such as stainless steel to reduce damage due to wear and the like.
It has a double structure in which the material is different between the inner diameter side and the outer diameter side. Alternatively, the same material may be used if the inner surfaces of the insertion portions (holes) of the ferrules 3 and 4 are increased in surface hardness by alumite treatment or the like. Further, since the mounting base 8 holds the adapter 5 in a stable state and has a heat radiating effect on the adapter 5, as the material thereof, a metal having a high thermal conductivity such as aluminum is used. I have.
しかして、温度測定手段６とは、取付台８の垂直壁11
に取付けられる熱電温度計が用いられる。具体的には、
スリーブ付熱電対が用いられ、スリーブ35が、第３図と
第５図に示す様にアダプタ５の外周面に設けられた孔部
36に挿入されるが、この孔部36は、第１・第２光ファイ
バ1,2の接続部７に対応している。従って、この熱電温
度計により、第１・第２光ファイバ１の接続部７の温度
が測定される。37はこの熱電温度計を垂直壁に取付ける
ためのフィッティングネジであり、該垂直壁11に設けら
れたねじ孔38に螺進退自在に螺着され、スリーブ35は孔
部36内に保持される。Thus, the temperature measuring means 6 includes the vertical wall 11 of the mounting base 8.
Is used. In particular,
A thermocouple with a sleeve is used, and a sleeve 35 is provided with a hole formed in the outer peripheral surface of the adapter 5 as shown in FIGS.
The hole 36 corresponds to the connecting portion 7 of the first and second optical fibers 1 and 2. Therefore, the temperature of the connection portion 7 of the first and second optical fibers 1 is measured by the thermoelectric thermometer. Reference numeral 37 denotes a fitting screw for mounting the thermoelectric thermometer on a vertical wall. The fitting screw 37 is screwed into a screw hole 38 provided in the vertical wall 11 so as to be able to advance and retreat, and the sleeve 35 is held in the hole 36.
そして、温度測定手段６にて測定された接続部７の温
度は、第４図に示す様に、ディジタル表示部39にてディ
ジタル表示される。このディジタル表示部39は、この接
続器が内装される箱体40の上面40aに設けられている。
また、温度測定手段６には、第１図に示す様に、外部出
力線41が設けられ、遠隔での温度管理を可能としてい
る。なお、箱体40は現場据付のため鉄製としている。Then, the temperature of the connecting section 7 measured by the temperature measuring means 6 is digitally displayed on the digital display section 39 as shown in FIG. The digital display unit 39 is provided on an upper surface 40a of a box 40 in which the connector is provided.
Further, as shown in FIG. 1, the temperature measuring means 6 is provided with an external output line 41 to enable remote temperature control. The box 40 is made of iron for installation on the site.
しかして、第１図に示す様に、第１光ファイバ１の入
射端にはコネクタ42が取付けられ、該コネクタ42は入射
レンズ43に接続され、該入射レンズ43には、レーザ源44
からのレーザ光が入射される。45は第２光ファイバ２に
出射端に取付けられるコネクタである。なお、レーザ源
44からのレーザ光は、YAGレーザ等の大出力レーザ光
（エネルギーが1W〜数KWである。）とされる。As shown in FIG. 1, a connector 42 is attached to the input end of the first optical fiber 1, and the connector 42 is connected to the input lens 43.
From the laser beam. 45 is a connector attached to the second optical fiber 2 at the emission end. The laser source
The laser beam from 44 is a high output laser beam such as a YAG laser (energy is 1 W to several KW).
従って、第１光ファイバ１の入射端に入射レンズ43を
介してレーザ光を入射させれば、そのレーザ光は第１光
ファイバ１内を伝送して、その出射端から出射し、第２
光ファイバ２の入射端に入射し、第２光ファイバ２内を
伝送して、該第２光ファイバ２の出射端から出射され
る。この際、ディジタル表示部39には、接続部７の温度
が表示され、その温度が異常値を示せば、直ちに、レー
ザ源44からのレーザ光の出射を停止して各光ファイバ1,
2の損壊を防止することができる。また、外部出力線41
を有しているので、離れた場所において接続部７の温度
管理を行うことができる。Therefore, if laser light is made incident on the incident end of the first optical fiber 1 via the incident lens 43, the laser light is transmitted through the first optical fiber 1, emitted from the emission end,
The light enters the input end of the optical fiber 2, is transmitted through the second optical fiber 2, and is output from the output end of the second optical fiber 2. At this time, the temperature of the connection section 7 is displayed on the digital display section 39, and if the temperature indicates an abnormal value, the emission of the laser beam from the laser source 44 is immediately stopped, and the optical fibers 1 and 2 are stopped.
2 can be prevented from being damaged. In addition, external output line 41
Therefore, the temperature of the connecting portion 7 can be controlled at a remote place.
なお、本発明は上述の実施例に限定されず、本発明の
用紙を逸脱しない範囲で設計変更自由であり、例えば、
接続部７の温度の測定個所は実施例では一箇所である
が、測定箇所を増加させるも自由であり、この場合、孔
部36の数を増加させ、該孔部36に夫々温度測定手段６の
スリーブ35を挿入保持させればよい。また、温度測定手
段６としてのセンサは、熱電温度計に限らず、抵抗温度
計、放射温度計等の種々の温度計を用いることができ
る。さらに、接続部７の測定温度が所定値を越えた場
合、警報音を発するように、警報機等を設けるも自由で
ある。また、この接続器を複数個（例えば、３個）用い
て複数の光ファイバ（例えば、３本）を着脱自在に接続
するようにするも自由であり、この場合、各接続器から
外部出力線41…を引き出すようにすれば、各接続部７…
の温度管理を離れた場所にて一括して行うことができ
る。In addition, the present invention is not limited to the above-described embodiment, and the design can be freely changed without departing from the paper of the present invention.
Although the temperature measuring point of the connecting portion 7 is one in the embodiment, the number of measuring points may be freely increased. In this case, the number of the holes 36 is increased, and the temperature measuring means 6 is provided in each of the holes 36. May be inserted and held. Further, the sensor as the temperature measuring means 6 is not limited to a thermoelectric thermometer, and various thermometers such as a resistance thermometer and a radiation thermometer can be used. Further, if the measured temperature of the connecting portion 7 exceeds a predetermined value, an alarm or the like may be provided so as to emit an alarm sound. In addition, a plurality of (for example, three) connecting devices may be used to freely connect and disconnect a plurality of optical fibers (for example, three). In this case, an external output line is provided from each connecting device. If you pull out 41…, each connecting part 7…
Can be collectively performed at a remote place.
〔発明の効果〕 本発明は上述の如く構成されているので、次に記載す
る効果を奏する。[Effects of the Invention] Since the present invention is configured as described above, the following effects can be obtained.
第１・第２光ファイバ1,2のうちどちらかが損壊した
場合、その損壊した光ファイバを新しい光ファイバと交
換することができ、作業性に優れたものとなり、また、
第１・第２光ファイバ1,2の接続部７の温度管理を行う
ことができるので、異常を直ちに検知することができ、
作業を停止して光ファイバ1,2の損壊を未然に防止する
ことができ、さらには、交換時期を予測したりすること
ができる。If one of the first and second optical fibers 1 and 2 is damaged, the damaged optical fiber can be replaced with a new optical fiber, resulting in excellent workability.
Since the temperature of the connecting portion 7 of the first and second optical fibers 1 and 2 can be controlled, an abnormality can be immediately detected,
The operation can be stopped to prevent the optical fibers 1 and 2 from being damaged, and furthermore, the replacement time can be predicted.
第１図は本発明の一実施例を示す全体簡略図、第２図は
要部拡大断面正面図、第３図は要部拡大断面側面図、第
４図は一部断面拡大平面図、第５図はアダプタの拡大側
面図、第６図は要部拡大断面正面図である。 １……第１光ファイバ、２……第２光ファイバ、６……
温度測定手段、７……接続部。FIG. 1 is an overall simplified view showing an embodiment of the present invention, FIG. 2 is an enlarged sectional front view of an essential part, FIG. 3 is an enlarged sectional side view of an essential part, FIG. FIG. 5 is an enlarged side view of the adapter, and FIG. 6 is an enlarged sectional front view of a main part. 1 ... first optical fiber, 2 ... second optical fiber, 6 ...
Temperature measuring means, 7, connection part.
───────────────────────────────────────────────────── フロントページの続き (72)発明者 阿久津 剛二 兵庫県伊丹市池尻４丁目３番地 三菱電 線工業株式会社伊丹製作所内 (72)発明者 塚本 義正 兵庫県神戸市兵庫区和田崎町１丁目１番 １号 三菱重工業株式会社神戸造船所内 (58)調査した分野(Int.Cl.6，ＤＢ名) G02B 6/24 G02B 6/36──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Goji Akutsu 4-3 Ikejiri, Itami-shi, Hyogo Mitsubishi Electric Wire & Technology Corporation Itami Works (72) Inventor Yoshimasa Tsukamoto 1 Wadazakicho, Hyogo-ku, Kobe-shi, Hyogo Chome 1-1 1 Inside Kobe Shipyard, Mitsubishi Heavy Industries, Ltd. (58) Field surveyed (Int.Cl. 6 , DB name) G02B 6/24 G02B 6/36
Claims (1)
を着脱自在に接続すると共に、該第１・第２光ファイバ
の接続部の温度を測定する温度測定手段を設けたことを
特徴とする大出力レーザ光用光ファイバ接続器。The present invention is characterized in that first and second optical fibers for high-power laser light are detachably connected, and temperature measuring means for measuring the temperature of a connection portion between the first and second optical fibers is provided. Characteristic optical fiber splicer for high power laser light.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1287215A JP2835384B2 (en) | 1989-11-02 | 1989-11-02 | Optical fiber connector for high power laser light |
| US07/604,628 US5177808A (en) | 1989-11-02 | 1990-10-29 | Optical energy beam transmission path structure |
| DE69031999T DE69031999T2 (en) | 1989-11-02 | 1990-10-31 | Coupling arrangement for high-energy optical beams |
| EP90120898A EP0426149B1 (en) | 1989-11-02 | 1990-10-31 | Optical coupling structure for high energy transmission |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1287215A JP2835384B2 (en) | 1989-11-02 | 1989-11-02 | Optical fiber connector for high power laser light |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03148611A JPH03148611A (en) | 1991-06-25 |
| JP2835384B2 true JP2835384B2 (en) | 1998-12-14 |
Family
ID=17714541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1287215A Expired - Lifetime JP2835384B2 (en) | 1989-11-02 | 1989-11-02 | Optical fiber connector for high power laser light |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2835384B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2010048873A (en) * | 2008-08-19 | 2010-03-04 | Fujikura Ltd | Optical connector |
| US8206041B2 (en) | 2008-03-18 | 2012-06-26 | Fujikura Ltd. | High power optical connector and optical fiber system using the same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003107282A (en) * | 2001-09-27 | 2003-04-09 | Mitsubishi Cable Ind Ltd | Temperature detector of optical connector for laser |
| JP4913076B2 (en) * | 2008-01-25 | 2012-04-11 | 株式会社精工技研 | Input / output optical connector |
| JP5239885B2 (en) * | 2009-01-19 | 2013-07-17 | 住友電気工業株式会社 | Optical waveguide inspection method, optical connector, and optical apparatus |
-
1989
- 1989-11-02 JP JP1287215A patent/JP2835384B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8206041B2 (en) | 2008-03-18 | 2012-06-26 | Fujikura Ltd. | High power optical connector and optical fiber system using the same |
| JP2010048873A (en) * | 2008-08-19 | 2010-03-04 | Fujikura Ltd | Optical connector |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03148611A (en) | 1991-06-25 |
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