JPS59228215A - Detecting method of interval between end surfaces of optical fibers - Google Patents
Detecting method of interval between end surfaces of optical fibersInfo
- Publication number
- JPS59228215A JPS59228215A JP10346683A JP10346683A JPS59228215A JP S59228215 A JPS59228215 A JP S59228215A JP 10346683 A JP10346683 A JP 10346683A JP 10346683 A JP10346683 A JP 10346683A JP S59228215 A JPS59228215 A JP S59228215A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical fiber
- face
- light receiving
- photodetection
- 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.)
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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
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
- G02B6/3803—Adjustment or alignment devices for alignment prior to splicing
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は光フアイバ融着接続時の光ファイバ端面間隔を
検知するのに好適な検知方法に関する０
光ファイバを放電加熱、レーザ加熱等により長手方向に
融着接続するとき、接続すべき１対の光フアイバ端部は
、これらの端面間隔が適正値となるよう、相対的に位置
決めされ、その適正端面間隔を得た後、融着加熱が開始
されるとともに両党ファイバ端部はこれらの突き合わせ
方向へ相対移動され、融着される。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a detection method suitable for detecting the distance between optical fiber end faces during optical fiber fusion splicing. , the ends of a pair of optical fibers to be connected are positioned relative to each other so that the distance between their end faces is an appropriate value, and after obtaining the appropriate end face distance, fusion heating is started and both fibers are connected. The ends are moved relative to each other in the direction in which they meet and are fused together.
上記における適正な端面間隔は、低損失の接続部をつく
るのに必要であり、一般的な端而間隔は数十μｍ程度で
ある。The appropriate end face spacing mentioned above is necessary to create a low-loss connection, and the typical end face spacing is about several tens of μm.
端面間隔の精度としては、シングルモードファイバの接
続例で±５μｍ程度以下が要求されているが、これは端
面間隔設定時に用いられる光フアイバ端部の送り機構が
高精度（誤差±２−μｍ以下）となっており、したがっ
て±５μｍの精度で上記端面間隔を設定することは実現
可能な範囲であるといえる。The accuracy of the end face spacing is required to be approximately ±5 μm or less in the example of connecting single mode fibers, but this is because the feeding mechanism of the optical fiber end used when setting the end face distance is highly accurate (error of ±2 μm or less). ) Therefore, it can be said that setting the end face spacing with an accuracy of ±5 μm is within a feasible range.
しかし、通常広く用いられている顕微鏡観察法により端
面間隔の適否をチェックするとき、これが人為的な作業
であることと相俟って±１０μｍ程度の誤差が生じてお
り、それ故、上記±５μｍ以下の精度が検知できなくな
っている。However, when checking the adequacy of the end face spacing using the commonly used microscopic observation method, an error of about ±10 μm occurs due to the fact that this is a manual process. The following accuracy is no longer detectable.
これを解消するため、第１図に示す光ファイバの端面検
知方法がすでに提案されている。To solve this problem, an optical fiber end face detection method shown in FIG. 1 has already been proposed.
第１図の方法では、ノ（ンドルファイ・（１の一側端を
光入射端部２、光出射端部３に分岐するとともにその他
側端を送受光端部４とし、上記光入射端部２には光発生
器５を、上記光出射端部３には受光器６をそれぞれ光学
的に接続するといった検知構成において、光発生器５に
よる光を光入射端部２からバンドルファイバ１中の所定
光ファイバへ入射させ、これによシ送受光端部４から光
束Ｗの光を出射状態とし、被覆除去された元ファイバ端
部７を第１図の矢印Ｘ方向へ移動させている。In the method shown in FIG. In a detection configuration in which a light generator 5 is optically connected to the light output end 3 and a light receiver 6 is optically connected to the light output end 3, the light from the light generator 5 is transmitted from the light input end 2 to a predetermined location in the bundle fiber 1. The light is made to enter the optical fiber, thereby causing the light beam W to be emitted from the transmitting/receiving end 4, and the original fiber end 7 from which the coating has been removed is moved in the direction of the arrow X in FIG.
第１図において光フアイバ端部７の端面８が２１点にあ
るとき、送受光端部４における光の状況に変化ばないが
、上記端面８が２２点に到来したとき、すなわち端面８
が光束Ｗの右端にかかったとき、送受光端部４から出射
された光の一部が光フアイバ端部７の周面に当たって反
射し、反射した光は送受光端部４から光出射端部３を経
て受光器６へ入射される。In FIG. 1, when the end face 8 of the optical fiber end 7 is at the 21st point, the light situation at the light transmitting/receiving end 4 does not change;
When applied to the right end of the light beam W, a part of the light emitted from the light transmitting/receiving end 4 hits the circumferential surface of the optical fiber end 7 and is reflected, and the reflected light is transferred from the light transmitting/receiving end 4 to the light emitting end. 3 and enters the light receiver 6.
光フアイバ端部７の端部８が２２点に到来したとき、受
光器６へ入力される反射光のレベルは最小値であり、以
下、元ファイバ端部７が２２点から矢印Ｘ方向へ移動す
るにしたがい、受光器６の受光レベルはアップする。When the end 8 of the optical fiber end 7 reaches the 22nd point, the level of the reflected light input to the receiver 6 is the minimum value, and the original fiber end 7 moves from the 22nd point in the direction of the arrow X. Accordingly, the level of light received by the light receiver 6 increases.
そして光フアイバ端部７の端面８が光束Ｗの左端と一致
する２３点に到ったとき、受光器６の受光レベルは最大
値となり、その後、端面８が２３点から２４点へ移行し
ても受光レベルは変化しないこととなる。When the end face 8 of the optical fiber end 7 reaches the 23rd point that coincides with the left end of the luminous flux W, the light reception level of the light receiver 6 reaches its maximum value, and then the end face 8 shifts from the 23rd point to the 24th point. However, the received light level remains unchanged.
したがって第１図の方法によるとき、受光器６側に上記
端面位置Ｐ２あるいはＰ３を検知すべき電気的、電子的
な検知装置を組みこんでおけばよく、こうした端部検知
に基づき、所期の端面間隔が設定できることになる。Therefore, when using the method shown in FIG. 1, it is sufficient to incorporate an electrical or electronic detection device to detect the end face position P2 or P3 on the receiver 6 side, and based on such end face detection, the desired position can be detected. This allows you to set the end face spacing.
しかし上記第１図の方法は、不確定な作業者の技量が介
在しない点でよいといえるが、以下に述べる２つの問題
がまだ残されている。However, although the method shown in FIG. 1 can be said to be good in that it does not involve the involvement of uncertain worker skills, the following two problems still remain.
その１つは被覆除去された光フアイバ端部と反射光との
関係であり、きれいに被覆除去するといえども、光フア
イバ端部の外周に被覆の一部が残存していることが少な
からずあり、こうした場合には光フアイバ端部で乱反射
が起こり、前述した２２点、２３点が正確に把握できな
くなる。One of them is the relationship between the end of the optical fiber from which the coating has been removed and the reflected light. Even if the coating is removed cleanly, there is often a portion of the coating left on the outer periphery of the end of the optical fiber. In such a case, diffuse reflection occurs at the end of the optical fiber, making it impossible to accurately grasp the points 22 and 23 mentioned above.
他の１つは光ファイバの寸法、制質であり、光ファイバ
の外径が大きいほど、また、屈折率が高いほど、
゛市 ゛ 前述した反射光量が多くなり、したが
って受光器θ側に組みこまれる検知装置では、２２点、
２３点などを検知すべき基準値を各種光ファイバに応じ
て設定しなければならず、しかも多種ある光７フイバに
つき、１つ１つデータ採取して基準値を設定しておかね
ばならないから、かなりの面倒が生じる。Another factor is the size and quality of the optical fiber; the larger the outer diameter of the optical fiber and the higher the refractive index,
゛ City ゛ The amount of reflected light mentioned above increases, so the detection device built into the receiver θ side has 22 points,
The standard values for detecting 23 points etc. must be set according to each type of optical fiber, and the standard values must be set by collecting data one by one for each of the various types of optical fibers. It will cause a lot of trouble.
本発明は上記の問題点に対処すべく、光ファイバ端部間
の透過光量によりその端面間隔が正確に検知できるよう
にしたもので、以下その検知方法を図示の実施例により
説明する。In order to solve the above-mentioned problems, the present invention is designed to accurately detect the distance between the end faces of optical fibers based on the amount of light transmitted between the ends.The detection method will be explained below with reference to the illustrated embodiment.
第２図において、ＩＱＡ、１０Ｂはそれぞれ被覆光ファ
イバの端部から被覆除去により露出された１対の光フア
イバ端部であり、これら光フアイバ端部１０Ａ、１０Ｂ
は、図示しない融着接続機に裂傷されている１対のファ
イバ載置台（Ｖ溝型あるいはＬ溝型）上において移動可
能に保持されており、この状態における両党フアイバ端
部１０Ａ、１０Ｂは突合軸線Ｌ１上で互いに対向してい
るとともにこれらの端面１１Ａ１１１Ｂ間には端面間隔
Ｇが介在している。In FIG. 2, IQA and 10B are a pair of optical fiber ends exposed by removing the coating from the end of the coated optical fiber, and these optical fiber ends 10A and 10B
is movably held on a pair of fiber mounting stands (V-groove type or L-groove type) that have been torn by a fusion splicer (not shown), and in this state, the ends of both fibers 10A, 10B are These end faces 11A and 111B face each other on the butt axis L1, and there is an end face interval G between them.
さらに第２図において１２は送光系、１３は受光系、１
４はその受光系１３に組みこまれた検一端部である。Further, in FIG. 2, 12 is a light transmitting system, 13 is a light receiving system, 1
Reference numeral 4 denotes a detection end portion incorporated into the light receiving system 13.
上記における送光系１２は変調回路１５を備えたＬＥＤ
またはＬＤなどの光発生器１６、入光端部および出光端
部にそれぞれロッドレンズ１７．１８が結合されたノ（
ンドルファイノ（１９からなる。The light transmission system 12 in the above is an LED equipped with a modulation circuit 15.
Alternatively, a light generator 16 such as an LD, with rod lenses 17 and 18 coupled to the light input end and the light output end, respectively (
ndolfaino (consisting of 19 pieces)
一方、受光系１３のバンドルファイバく２０はその受光
端部にスリット２１付の遮光板２２を備えているととも
にその出光端部にはロッドレンズ２３、ＰＤｔたはＡＰ
Ｄなどの受光器２４を備えており、さらに該受光器２４
に接続された検知部１４は、復調回路２５、微分回路２
６、比較回路２７．２８を備え、これら比較回路２７．
２８には基準電圧Ｅ ｖ １、Ｅ Ｖ ２がかけられる
ようＶＣｆｘつている。On the other hand, the bundle fiber 20 of the light receiving system 13 is equipped with a light blocking plate 22 with a slit 21 at its light receiving end, and a rod lens 23, PDt or AP at its light emitting end.
It is equipped with a light receiver 24 such as D, and the light receiver 24
The detection unit 14 connected to the demodulation circuit 25 and the differentiation circuit 2
6, comprising comparison circuits 27 and 28, and these comparison circuits 27.
28 is provided with VCfx so that reference voltages E v 1 and E V 2 can be applied thereto.
そして前述した送光系１２の送光端部すなわちロッドレ
ンズ１８と、受光系１３の遮光板２２を備えた受光端部
とは、突合軸線Ｌ１ と交差して端面間隔Ｇを通る測
定軸線Ｌ２上において両光ファイバ端部１０Ａ、１０Ｂ
を挾むように配置されている。The above-described light transmitting end of the light transmitting system 12, that is, the rod lens 18, and the light receiving end of the light receiving system 13 equipped with the light shielding plate 22 are located on a measurement axis L2 that intersects the abutment axis L1 and passes through the end face distance G. At both optical fiber ends 10A, 10B
It is arranged to sandwich the.
第２図に示す本発明では、送光系１２において変調回路
１５により変調をかけながら光発生器１６より所定の光
を発生させ、これをロッドレンズ１７により平行光線と
してバンドルファイバ１９内に入射させるとともにその
送光端部側のロッドレンズ１８から端面間隔ＧＫ向けて
出射する。In the present invention shown in FIG. 2, a predetermined light is generated from a light generator 16 while being modulated by a modulation circuit 15 in a light transmission system 12, and is made to enter a bundle fiber 19 as a parallel light beam by a rod lens 17. At the same time, the light is emitted from the rod lens 18 on the light transmitting end side toward the end face distance GK.
受光系１３では、上記端面間隔ＧがＧ＝Ｏでないかぎり
上述の光を受光するのであり、端面間隔Ｇを通過した光
は、遮光板２２のスリット２１、バンドルファイバ２Ｑ
１ ロッドレンズ２３を経て受光器２４により受光され
、以下は検知部１４の復調回路２５、微分回路２６を経
由して比較回路２７に入り、該比較回路２７では、電圧
値に変換された受光レベルと、あらかじめ設定しである
基準電圧Ｅｖとを電気的、電子的に比較演算処理する。The light receiving system 13 receives the above-mentioned light unless the end face spacing G is not G=O, and the light that has passed through the end face spacing G passes through the slit 21 of the light shielding plate 22 and the bundle fiber 2Q.
1 The light is received by the light receiver 24 through the rod lens 23, and then enters the comparison circuit 27 via the demodulation circuit 25 and the differentiation circuit 26 of the detection unit 14, and in the comparison circuit 27, the received light level is converted into a voltage value. and a preset reference voltage Ev are electrically and electronically compared and processed.
上記において、両党ファイバ端部１０Ａ。In the above, both fiber ends 10A.
１０Ｂはパルス駆動されたＤＣモータの駆動力を介して
これらの突き合わせ方向へ相対移動される。10B is relatively moved in the direction of these butts through the driving force of a pulse-driven DC motor.
はじめ、光フアイバ端部１０Ａを第２図の矢印Ｘ方向へ
移動させるが、その端面１１Ａが受光側バンドルファイ
バ２ｏの左端２０Ａにかかったとき、送党側バンドルフ
ァイノく１９から出射される光の一部が遮断され、受光
系１３ではその分だけ受光レベルが低下することに＆る
。Initially, the optical fiber end 10A is moved in the direction of the arrow X in FIG. A portion of the light is blocked, and the level of light received by the light receiving system 13 is reduced by that amount.
この受光レベルの変化は検知部１４を介して検知できる
のであり、上記端面１１Ａがバンドルファイバ２ｏの左
端２０Ａにかかった時点で光フアイバ端部１０Ａを停止
させると、その受光レベルは第３図ｔ１のようになる。This change in the light reception level can be detected via the detection unit 14, and when the optical fiber end 10A is stopped at the time when the end face 11A is applied to the left end 20A of the bundle fiber 2o, the light reception level is changed to t1 in FIG. become that way.
つぎに光フアイバ端部１０Ｂを第２図の矢印Ｘ′方向へ
移動させ、その端面１１Ｂがバンドルファイバ１９の右
端にかかったとき、前記と同様、該光フアイバ端部１１
Ｂを停止させるのであり、このときの受光レベルは第３
図ｔ２である。Next, when the optical fiber end 10B is moved in the direction of the arrow X' in FIG.
B is stopped, and the received light level at this time is 3rd level.
This is Figure t2.
その後、光フアイバ端部１０Ａ、１０Ｂを上記Ｘ方向
Ｘ １方向へ交互に送るが、上記移動後の端面間隔をＧ
とすると、これら端部１０Ａ。After that, the optical fiber ends 10A and 10B are connected in the above X direction.
X It is sent alternately in one direction, but the distance between the end faces after the above movement is G
Then, these ends 10A.
づく端部移動により受光レベルは第３図ｔ３〜ｔｎのよ
うに変化する。Due to the movement of the end, the received light level changes as shown in t3 to tn in FIG. 3.
なお、第３図ｔ５ ・・・・・ｔｎの間は一方の光フア
イバ端部１０Ａを１μｍ単位（＠記・（ルス駆動された
ＤＣモータの１パルス送り量）でインチング移動させた
ときの受光レベル変化を示しており、さらにｔｎは各端
面１１Ａ、１１Ｂが互いに突き合わされ、受光レベルが
はソ０になった状態を示している。In addition, between t5 and tn in Fig. 3, the light received when one optical fiber end 10A is inched in 1 μm units (@ (1 pulse feed amount of a Lux-driven DC motor)). It shows a level change, and further, tn shows a state in which the respective end surfaces 11A and 11B are brought into contact with each other and the light reception level becomes 0.
したがって受光系１３の検知部１４により上記受光レベ
ルｔｎを検知することにより各端面１１Ａ、１１Ｂが互
いに突き合わされた状態すなわち端面間隔Ｇｏｏ（最小
値）が知得でき、その後は光フアイバ端部１０Ａ、１０
Ｂのいずれか一方または両方を前記の逆方向へ所定量だ
け移動させることにより、各端面１１Ａ、１１Ｂの間隔
が正確に設定され、このときの受光レベルは第３図ｔｎ
−＋のようになる。Therefore, by detecting the light reception level tn by the detection unit 14 of the light receiving system 13, it is possible to know the state in which the end faces 11A and 11B are butted against each other, that is, the end face interval Goo (minimum value), and after that, the optical fiber end 10A, 10
By moving one or both of B by a predetermined amount in the opposite direction, the distance between each end surface 11A, 11B is accurately set, and the light reception level at this time is as shown in FIG.
It becomes like -+.
つぎに具体的事項について説明する。Next, specific matters will be explained.
光フアイバ端部１０Ａ、１０Ｂの外径が１２５μｍ程度
であるとき、バンドルファイバ１９．２０は外径１陥の
ものが用いられる。When the outer diameter of the optical fiber ends 10A and 10B is about 125 μm, bundle fibers 19 and 20 with an outer diameter of 1 are used.
遮光板２２としてはスリット２１の幅、長さがそれぞれ
０．１ ｍｍ、２ ｔａｎであるものが用いられる。As the light shielding plate 22, one in which the width and length of the slit 21 are 0.1 mm and 2 tan, respectively, is used.
この遮光板２２は光フアイバ端部１０Ａ。This light shielding plate 22 is the optical fiber end 10A.
１０Ｂの外側を通った光が受光側バンドルファイバ２ｏ
へ入射するのを防止する。The light passing through the outside of 10B is sent to the receiving side bundle fiber 2o.
prevent it from entering.
変調回路１５は外部迷光の影響を除去するため用いられ
、これにともなって復調回路２５も用いられているが、
この対策のための別手段として、ロッドレンズ２３の端
面に光源光の波長成分のみを通過させる光干渉フィルタ
を膜状に蒸着してもよい。The modulation circuit 15 is used to remove the influence of external stray light, and along with this, the demodulation circuit 25 is also used.
As another measure against this, an optical interference filter that allows only the wavelength component of the light source light to pass may be deposited on the end face of the rod lens 23 in the form of a film.
微分回路２６は光源出力（光発生器１５）が変動するの
を長期にわたって保証するため用いられる。Differentiator circuit 26 is used to ensure that the light source output (light generator 15) does not fluctuate over time.
第３図におけるΔｔは端面位置の認識ずれや送りモーフ
の慣性による送り過剰を示したものであるが、との△ｔ
を１０μｍ 以下に抑えることは現実的に可能であり、
問題にはならない。Δt in Fig. 3 indicates excessive feed due to misrecognition of the end face position and inertia of the feed morph.
It is realistically possible to suppress the
It's not a problem.
前述した光フアイバ端部１０Ａ、１０ＢはＤＣモータの
駆動力を介して移動されるが、この際の移動量は上記パ
ルス駆動されたＤＣモータの駆動時間を基準にしてコン
トロールされる。The aforementioned optical fiber ends 10A and 10B are moved by the driving force of the DC motor, and the amount of movement at this time is controlled based on the driving time of the pulse-driven DC motor.
したがって第３図の横軸は、距離ではなく端面の移動時
間をあられしている。Therefore, the horizontal axis in FIG. 3 represents the travel time of the end face rather than the distance.
光ファイバ端面１１Ａ、１１Ｂが互いに突き合わされる
までの移動量はそれぞれ５００μｍであり、第３図ｔ、
・・・・・ｔｎのように一方の光フアイバ端部１０Ａを
インチングする量は約５０μｍ（４９μｍ）である。The amount of movement of the optical fiber end faces 11A and 11B until they abut each other is 500 μm, respectively.
...The amount by which one optical fiber end 10A is inched, such as tn, is approximately 50 μm (49 μm).
基準電圧Ｅｖｌ はＯボルト近くのノイズの影響を避け
るため、完全に０とせず、端面間隔Ｇが１μｍのときの
検知出力電圧に設定しである。In order to avoid the influence of noise near O volts, the reference voltage Evl is not set to completely 0, but is set to the detection output voltage when the end face spacing G is 1 μm.
したがって第３図ｔｎのときの端面間隔Ｇは、実際上は
１μｍである。Therefore, the end face spacing G in FIG. 3 tn is actually 1 μm.
第３図ｔｎを検知した後に設定する端面１１Ａ、１１Ｂ
相互の間隔、すなわち光ファイバを融着するのに適切な
間隔が１０μｍであるとき、光フアイバ端部１０Ａまた
は１０Ｂを９μｍ退勤させればよい。Fig. 3 End faces 11A and 11B set after detecting tn
When the mutual spacing, that is, the appropriate spacing for fusing the optical fibers, is 10 μm, the optical fiber ends 10A or 10B may be separated by 9 μm.
以上説明した通り、本発明方法は端面間隔をおいて１対
の光フアイバ端部を突合軸線上で互いに対向させ、該突
合軸線と交差して上記端面間隔を通る測定軸線上には、
両光ファイバ端部を挾むようにして送光系の送光端部、
受光系の受光端部を配置し、上記端面間隔を光が通過す
るよう、送光系から受光系にわたって光を送９、当該送
光状態において両党ファイバ端部をその突き合わせ方向
へ相対移動させ、上記受光系における最小受光レベルに
より両光ファイバ端部の端面間隔が最小値になったこと
を検知するから、光フアイバ端部の表面状部、外径、材
質などに影響されることなく、端面間隔を通過する光量
の大幅な減少により、所望の端面間隔が正確に検知でき
、これに基づいて光フアイバ融着接続のための端面間隔
も適正に設定できる。As explained above, in the method of the present invention, a pair of optical fiber ends are opposed to each other on the abutment axis with a gap between the end faces, and on the measurement axis that intersects the abutment axis and passes through the end face spacing,
The light transmitting end of the light transmitting system, sandwiching the ends of both optical fibers,
The light-receiving end of the light-receiving system is arranged, and the light is transmitted from the light-transmitting system to the light-receiving system so that the light passes through the end face spacing, and in the light-transmitting state, the ends of both fibers are moved relative to each other in the abutting direction. Since it is detected that the distance between the end faces of both optical fiber ends has reached the minimum value based on the minimum light receiving level in the light receiving system, it is not affected by the surface shape, outer diameter, material, etc. of the optical fiber ends. Due to the significant reduction in the amount of light passing through the end face spacing, the desired end face spacing can be accurately detected, and based on this, the end face spacing for optical fiber fusion splicing can also be appropriately set.
第１図は従来法の説明図、第２図は本発明方法の説明図
、第３図は本発明方法における受光レベルの説明図であ
る。
１０Ａ、１０Ｂ・・・・・光フアイバ端部１１Ａ、１１
Ｂ・・・・・端 面
１２・・・・・受光系
１３・・・・・送光系
１４・・・・・検知部
１６・・・・・光発生器
１９・・・・・送光系のバンドルファイバ２ｏ・・・・
・受光系のバンドルファイバ２１・・■・スリット
２２・・・・・遮光板
２４・・・・・受光器
Ｇ・・・・・端部開削
り、・・・・突合軸線
Ｌ２・・・・測定軸線
特許出願人
代理人 弁理士 井 藤 誠
市原市へ幡海岸通６番地古河電
気工業株式会社千葉電線製造所
内
０発 明 者 加藤康之
茨城県那珂郡東海村大字白方字
白根１６２番地日本電信電話公社
茨城電気通信研究所内
■出 願 人 日本電信電話公社FIG. 1 is an explanatory diagram of the conventional method, FIG. 2 is an explanatory diagram of the method of the present invention, and FIG. 3 is an explanatory diagram of the light reception level in the method of the present invention. 10A, 10B...Optical fiber end portions 11A, 11
B... End surface 12... Light receiving system 13... Light transmitting system 14... Detection section 16... Light generator 19... Light transmitting System bundle fiber 2o...
・Bundle fiber 21 of the light receiving system... ■・Slit 22... Light shielding plate 24... Light receiver G... End cut open,... Butt axis L2... Measuring Axis Patent Applicant Representative Patent Attorney Makoto Ifuji 6, Hatakaigan-dori, Ichihara City, Furukawa Electric Co., Ltd., Chiba Electric Wire Manufacturing Plant Inventor: Yasuyuki Kato, 162 Shirakata, Shirane, Oaza, Shirakata, Tokai Village, Naka District, Ibaraki Prefecture Within Ibaraki Telecommunications Research Institute, Telephone Public Corporation ■Applicant: Nippon Telegraph and Telephone Public Corporation
Claims (1)
合軸線上で互いに対向させ、該突合軸線と交差して上記
端面間隔を通る測定軸線上には、両光ファイバ端部を挾
むようにして送光系の送光端部、受光系の受光端部を配
置し、上記端面間隔を光が通過するよう、送光系から受
光系にわたって光を送り、当該送光状態において両党フ
ァイバ端部をその突き合わせ方向へ相対移動させ、上記
受光系における最小受光レベルにより両光ファイバ端部
の端面間隔が最小値になったことを検知する光ファイバ
の端面間隔検知方法。 （２）送光系から受光系にわたって光を送るとき、受光
系にはその受光端部側にスリット付の遮光板を配置して
おき、該遮光板のスリットを通過した光のみを当該受光
系へ入射させる特許請求の範囲第１項記載の光ファイバ
の端面間隔検知方法。 （３） 受光系は、送光系からの光波長成分のみを通
過させる光干渉フィルタを備えている特許請求の範囲第
１項記載の光ファイバの端面間隔検知方法。[Scope of Claims] [1] A pair of optical fiber ends are opposed to each other on an abutment axis with an end face interval, and on a measurement axis that intersects the abutment axis and passes through the end face interval, both optical fibers are arranged. The light transmitting end of the light transmitting system and the light receiving end of the light receiving system are arranged so as to sandwich the fiber ends, and the light is sent from the light transmitting system to the light receiving system so that the light passes through the end face spacing, and the light transmitting state is adjusted. A method for detecting an end face spacing of an optical fiber, comprising: relatively moving the ends of both optical fibers in a direction in which they abut, and detecting that the end face spacing between the ends of both optical fibers has reached a minimum value based on the minimum light reception level in the light receiving system. (2) When sending light from the light transmitting system to the light receiving system, a light shielding plate with slits is placed on the light receiving end side of the light receiving system, and only the light that has passed through the slit of the light shielding plate is transmitted to the light receiving system. A method for detecting an end face distance of an optical fiber according to claim 1, wherein the optical fiber is incident on the optical fiber. (3) The method for detecting the distance between end faces of an optical fiber according to claim 1, wherein the light receiving system includes an optical interference filter that allows only the light wavelength component from the light transmitting system to pass through.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10346683A JPS59228215A (en) | 1983-06-09 | 1983-06-09 | Detecting method of interval between end surfaces of optical fibers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10346683A JPS59228215A (en) | 1983-06-09 | 1983-06-09 | Detecting method of interval between end surfaces of optical fibers |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS59228215A true JPS59228215A (en) | 1984-12-21 |
Family
ID=14354784
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10346683A Pending JPS59228215A (en) | 1983-06-09 | 1983-06-09 | Detecting method of interval between end surfaces of optical fibers |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS59228215A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62203104A (en) * | 1986-03-03 | 1987-09-07 | Nippon Telegr & Teleph Corp <Ntt> | Setting method for gap between optical fiber end surfaces |
| JPS63116110A (en) * | 1986-11-04 | 1988-05-20 | Nippon Telegr & Teleph Corp <Ntt> | Positioning and aligning device for wore rod |
-
1983
- 1983-06-09 JP JP10346683A patent/JPS59228215A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62203104A (en) * | 1986-03-03 | 1987-09-07 | Nippon Telegr & Teleph Corp <Ntt> | Setting method for gap between optical fiber end surfaces |
| JPS63116110A (en) * | 1986-11-04 | 1988-05-20 | Nippon Telegr & Teleph Corp <Ntt> | Positioning and aligning device for wore rod |
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