JPS5815052B2 - Optical fiber splice loss measurement method and measurement device - Google Patents
Optical fiber splice loss measurement method and measurement deviceInfo
- Publication number
- JPS5815052B2 JPS5815052B2 JP1141178A JP1141178A JPS5815052B2 JP S5815052 B2 JPS5815052 B2 JP S5815052B2 JP 1141178 A JP1141178 A JP 1141178A JP 1141178 A JP1141178 A JP 1141178A JP S5815052 B2 JPS5815052 B2 JP S5815052B2
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- Prior art keywords
- optical fiber
- light
- splice loss
- loss
- connection point
- Prior art date
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- Testing Of Optical Devices Or Fibers (AREA)
Description
【発明の詳細な説明】
本発明は非破壊で、かつ近端測定可能な光ファイバの接
続損失測定法およびその測定装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring splice loss of an optical fiber that is nondestructive and capable of near-end measurement, and a measuring device therefor.
従来、接続損失を測定する一方法としては、接続点のな
い光ファイバの一端から光を入射し、他端から出射する
光パワーＰ２を測定し、次にこの光ファイバの１箇所を
切断した後、切断箇所を接続した場合に他端から出射す
る光パワーＰ１を測定して、１０１０１ｏの計算によっ
て接続損失を求める方法があったが、この方法は接続損
失を測定するために光ファイバを切断する必要があり光
ファイバを次々に接続して長尺な光線路を構成する場合
の接続損失を測定することは不可能である。Conventionally, one method for measuring splice loss is to input light from one end of an optical fiber without a splicing point, measure the optical power P2 emitted from the other end, and then cut one point of this optical fiber and then measure the optical power P2. There was a method of measuring the optical power P1 emitted from the other end when the cut point is connected and calculating the splice loss by calculating 10101o, but this method cuts the optical fiber in order to measure the splice loss. However, it is impossible to measure the splice loss when a long optical line is constructed by connecting optical fibers one after another.
第１図および第２図は従来性われている他の方法の原理
的説明図である。FIGS. 1 and 2 are diagrams explaining the principle of another conventional method.
第１図において、１は接続点を含むファイバであり、２
は接続点、３は光の伝搬方向である。In FIG. 1, 1 is a fiber including a connection point, 2
is the connection point, and 3 is the propagation direction of light.
接続点２から光の入射方向に２〜４ｍ進んだ位置で切断
された光フアイバ端面から出射する光パワーＰ１を測定
し、次に接続点２の直前で切断された光フアイバ端面か
ら出射する光パワーＰ２を測定した場合、接続損失は１
０Ａｏｇ−デシベルで与えられる。Measure the optical power P1 emitted from the end face of the optical fiber cut at a position 2 to 4 m in the direction of light incidence from connection point 2, and then measure the light emitted from the end face of the optical fiber cut just before connection point 2. When measuring power P2, the connection loss is 1
It is given in 0 Aog-decibels.
この方法では接続損失測定によって接続されたファイバ
は切断される。In this method, the spliced fibers are disconnected by measuring the splice loss.
第２図は接続を行う前にファイバ４の端面５からの出射
光パワーＰ２を測定し、次に接続ファイバ６を接続した
後のファイバ６の端面７からの出射光パワーＰ、を測定
する。In FIG. 2, the output light power P2 from the end face 5 of the fiber 4 is measured before connection, and then the output light power P from the end face 7 of the fiber 6 after the connection fiber 6 is connected is measured.
ファイバ６の損失はあらかじめ測定されているとし、こ
れをαデシベルとすると、接続損失は１０１ｏ１０１ｏ
アンヘルで与えられる。Assuming that the loss of fiber 6 has been measured in advance, and if this is α decibel, the splice loss is 101o101o
Given in Angel.
第１図の方法では、接続損失測定のために接続が破壊さ
れるので、光ファイバを接続して光線路を構成する場合
には適用できないという欠点かあった。The method shown in FIG. 1 has the disadvantage that it cannot be applied when connecting optical fibers to form an optical line because the connection is destroyed to measure the splice loss.
第２図の方法では、長尺の光線路を構成する場合にも適
用できるが、接続ファイバの損失が既知である必要があ
る。The method shown in FIG. 2 can be applied to constructing a long optical line, but requires that the loss of the connecting fiber be known.
また第２図の方法の場合、被接続ファイバ内に光を伝搬
させておく必要があるので、光ファイバを接続して長尺
の光線路を構成する場合には、遠端測定となり、測定が
煩雑になるという欠点があった。In addition, in the case of the method shown in Figure 2, it is necessary to propagate the light within the connected fiber, so when connecting optical fibers to construct a long optical path, the measurement will be performed at the far end. The drawback was that it was complicated.
さらに従来のいずれの方法においても、光ファイバを伝
搬した光を利用しているので、次のような不合理があっ
た。Furthermore, since all of the conventional methods utilize light propagated through an optical fiber, they have the following unreasonableness.
すなわち光ファイバへの光の入射を再現性良く行うこと
が困難であったり、光ファイバの使用状態における曲が
り等によってファイバの特性が変化してしまうので、接
続点に到達する光の状態が様々に変化して、一義的な接
続損失を定義できなかった。In other words, it is difficult to input light into an optical fiber with good reproducibility, and the characteristics of the fiber change due to bending during use, so the state of light that reaches the connection point may vary. variation, and no unambiguous connection loss could be defined.
本発明は光ファイバの接続部およびその近傍に光を照射
し、その散乱光の光フアイバ軸方向の強度分布を測定す
ることにより、接続損失を測定することを特徴とし、そ
の目的は光ファイバの接続損失を非破壊で、かつ近端測
定を簡便に可能とし、ンさらに一義的な接続損失決定を
可能にすることにある。The present invention is characterized in that splice loss is measured by irradiating light onto the splice of an optical fiber and its vicinity and measuring the intensity distribution of the scattered light in the axial direction of the optical fiber. The object of the present invention is to enable non-destructive and easy near-end measurement of splice loss, and also to enable unambiguous determination of splice loss.
第３図と第４図は本発明の詳細な説明するための図であ
り、第３図は接続点を含まない光ファイバ８に光を当て
た場合で、入射光９の光ファイバ、８による散乱光１０
は光ファイバ８を軸方向に移動させても、光ファイバ８
が軸方向に均一であるので変化しない。3 and 4 are diagrams for explaining the present invention in detail, and FIG. 3 shows a case where light is applied to an optical fiber 8 that does not include a connection point, and the incident light 9 is transmitted through the optical fiber 8. Scattered light 10
Even if the optical fiber 8 is moved in the axial direction, the optical fiber 8
is uniform in the axial direction, so it does not change.
第４図は融着接続法等の接続によって外径とファイバ内
屈折率分布が不整となった光ファイバに光を入射した場
合を示している。FIG. 4 shows a case where light is incident on an optical fiber whose outer diameter and internal refractive index distribution are irregular due to splicing such as fusion splicing.
この場合には、接続点において不整が最大で、接続点か
ら離れるに従って不整が減少していく。In this case, the irregularity is greatest at the connection point, and decreases as the distance from the connection point increases.
したがってファイバ１を軸方向に移動すると、散乱光の
強度は変化する。Therefore, when the fiber 1 is moved in the axial direction, the intensity of the scattered light changes.
この変化が大きい程、接続点２およびその近傍における
不整が大きく、接続損失が大きいことになる。The larger this change is, the greater the irregularity at the connection point 2 and its vicinity, and the greater the connection loss.
接続方法が他の方法、たとえば端面つき合わせ法のよう
な場合にも、つき合わせによる折れ仙がりゃ、くい違い
、あるいは端面間の空隙によって、融着接続部と同等に
考えられる。Even when the connection method is another method, such as the end-face butting method, it is considered to be equivalent to a fusion splice due to folds, gaps, or gaps between the end faces due to the butt.
第５図は本発明の効果を実験的に確認するために用いた
測定系の斜視図で、１１は融着接続された光ファイバ１
を固定する固定台、１２は固定台１１を一定速度で動か
す移動装置、１３は照射光を送る光ファイバ、１４は散
乱光を受光し、光センサーに導く光ファイバ、１５はＬ
ＥＤ光源、１６は光センサ−，１７は電流増幅器、１８
はＸＹレコーダである。FIG. 5 is a perspective view of a measurement system used to experimentally confirm the effects of the present invention, and 11 is a fusion-spliced optical fiber 1.
12 is a moving device that moves the fixed base 11 at a constant speed; 13 is an optical fiber that sends the irradiated light; 14 is an optical fiber that receives scattered light and guides it to the optical sensor; 15 is an L
ED light source, 16 is a light sensor, 17 is a current amplifier, 18
is an XY recorder.
光ファイバ１．１３．１４はいずれもコア径６０μｍ１
外径１５０μｍのグレーデッド形光ファイバで、光ファ
イバ１３および１４の長さは５ｍである。Optical fibers 1, 13, and 14 all have a core diameter of 60 μm1
The optical fibers 13 and 14 are graded optical fibers with an outer diameter of 150 μm and a length of 5 m.
移動装置１２には移動量を示すための出力端があり、Ｘ
Ｙレコーダ１８のＸ端子と結線される。The moving device 12 has an output end for indicating the amount of movement, X
It is connected to the X terminal of the Y recorder 18.
電流増幅器１７の出力はＸＹレコーダ１８のＸ端子に結
線される。The output of the current amplifier 17 is connected to the X terminal of the XY recorder 18.
光ファイバ１３と１４の光ファイバ１の近傍における軸
方向は一致しており、光ファイバ１と同一平面内で直交
している。The axial directions of the optical fibers 13 and 14 in the vicinity of the optical fiber 1 are the same, and are perpendicular to the optical fiber 1 within the same plane.
第６図は第５図の測定系において、固定台１１を約２０
０μｍ移動した場合のＸＹレコーダ出力の一例を示す。Figure 6 shows the measurement system shown in Figure 5, with the fixed base 11 being approximately 2
An example of the XY recorder output when moving by 0 μm is shown.
横軸は光ファイバ１の移動量を表わし、縦軸は前方散乱
光の強度を表わしている。The horizontal axis represents the amount of movement of the optical fiber 1, and the vertical axis represents the intensity of forward scattered light.
光ファイバの接続点およびその近傍における不整の大き
さは、第６図の１９で示される最大受光レベル差、第６
図の波形の変化の度合および第６図の波形の変化してい
る部分の面積等から評価できる。The magnitude of the irregularity at the connection point of the optical fiber and its vicinity is determined by the maximum received light level difference indicated by 19 in FIG.
It can be evaluated from the degree of change in the waveform shown in the figure and the area of the changing portion of the waveform shown in FIG.
第７図は従来の方法で測定された接続損失と、本発明に
基づいて実測された第６図に示す１９の大きさとの相関
を示している。FIG. 7 shows the correlation between the connection loss measured by the conventional method and the magnitude of 19 shown in FIG. 6, which was actually measured based on the present invention.
横軸は従来法による損失で、縦軸は１９の大きさをレコ
ーダ記録紙上の長さで読んだ値である。The horizontal axis is the loss due to the conventional method, and the vertical axis is the value obtained by reading the size of 19 by the length on the recorder recording paper.
未知の接続損失をもつ接続された光ファイバについて、
第６図に示すような測定を行い、受光レベルの最大値と
最小値の差を求めるだけで、第７図を用いて接続損失を
求めることができる。For a spliced optical fiber with unknown splice loss,
The connection loss can be determined using FIG. 7 by simply performing measurements as shown in FIG. 6 and determining the difference between the maximum and minimum values of the received light level.
接続損失を求めようとする光ファイバの接続部における
不整部の光ファイバの軸方向の長さがほぼ一定である場
合には、接続損失の大きさは、第６図に示す受光パワー
の最大値と最小値の差１９と強い相関をもつが、不整部
の光フアイバ軸方向の長さが一定でない場合には、受光
パワーの最大値と最小値の差１９よりも第６図に斜線で
示した面積き強い相関をもち、この場合は接続損失と散
乱光強度分布の面積についての相関図を、あらかじめ準
備しておくことにより、散乱光強度分布の測定から接続
損失を求めることができる。If the length in the axial direction of the optical fiber at the irregular part at the splice of the optical fiber whose splice loss is to be determined is approximately constant, the magnitude of the splice loss is determined by the maximum received light power shown in Figure 6. There is a strong correlation with the difference 19 between the maximum value and the minimum value, but if the length of the irregular part in the optical fiber axis direction is not constant, the diagonal line in Fig. In this case, by preparing a correlation diagram between the area of the splice loss and the scattered light intensity distribution in advance, the splice loss can be determined from the measurement of the scattered light intensity distribution. .
本発明によれば、その測定原理から明らかなように、接
続部の不整状態が軸対称であれば、任意方向の散乱光の
測定から接続損失を一義的に決定できるが、軸対称でな
い場合でも、複数方向からの光の照射と複数方向の散乱
光の測定から接続損失を近似的に一義的に決定できる。According to the present invention, as is clear from the measurement principle, if the irregular state of the connection part is axially symmetric, the connection loss can be uniquely determined from the measurement of scattered light in any direction; , the splice loss can be approximately and uniquely determined from irradiation of light from multiple directions and measurement of scattered light from multiple directions.
第８図は本発明による一実施例の斜視図で、１は接続部
をもつ光ファイバ、１１は光ファイバ１を固定支持する
台、１３は照射光を送る光ファイバ、１４は散乱光を受
光し、光センサーに導く光ファイバ、２０は光ファイバ
１３を固定支持する台、２１は光ファイバ１４を固定支
持する台、２２は全体を支持する支持台であり、同時に
固定台１１を一定速度で移動させる機能を持っている。FIG. 8 is a perspective view of an embodiment according to the present invention, in which 1 is an optical fiber having a connection part, 11 is a stand that fixedly supports the optical fiber 1, 13 is an optical fiber that sends irradiated light, and 14 receives scattered light. 20 is a stand that fixedly supports the optical fiber 13, 21 is a stand that fixedly supports the optical fiber 14, and 22 is a support stand that supports the whole. At the same time, the fixed stand 11 is moved at a constant speed. It has the ability to move.
第８図では光ファイバ１３と１４の光フアイバ１近傍の
軸方向は一致しており、光ファイバ１と同一平面内で直
交しているが、必ずしも直交している必要はなく、また
同一平面上になくてもよい。In FIG. 8, the axial directions of the optical fibers 13 and 14 near the optical fiber 1 are the same and are perpendicular to the optical fiber 1 in the same plane, but they do not necessarily have to be perpendicular to the optical fiber 1 and are in the same plane. It doesn't have to be.
第９図は直交していない場合の効果を説明するための図
で、ファイバ１の接続部が非常に狭い不整部をもつ場合
でも、照射光線９、散乱光線１０に対して斜め方向（第
９図において光ファイバ１の軸方向）に光ファイバ１を
移動してやることに□より、不整の影警が散乱光線１０
に顕著に現われる。FIG. 9 is a diagram for explaining the effect when the fibers 1 are not perpendicular to each other. By moving the optical fiber 1 in the axial direction of the optical fiber 1 in Fig. 9), the irregular shadow is scattered by the scattered light 10.
It appears conspicuously.
光ファイバ１４の受光面の大きさに関しては、光ファイ
バ１３からの直射光が入らない程度の場合には、純粋に
散乱光だけを集めることができ、直射光が入る程度に大
きい場合には、接続されたファイバの外径変動の大きさ
が強調して記録されるという効果をもつ。Regarding the size of the light-receiving surface of the optical fiber 14, if it is large enough to prevent direct light from the optical fiber 13 from entering, only scattered light can be collected; if it is large enough to allow direct light to enter, This has the effect of emphasizing and recording the magnitude of the variation in the outer diameter of the connected fibers.
第８図に示す実施例では、光ファイバの端面からの出射
光と光フアイバ端面へ入射する散乱光を利用しているが
、固定台２０および２１を取り除き、代わりにレンズ系
を配置して光を照射し、または散乱光を集めてもよいし
、発光素子および受光素子をそのまま配置してもよい。In the embodiment shown in FIG. 8, the light emitted from the end face of the optical fiber and the scattered light incident on the end face of the optical fiber are used, but the fixing bases 20 and 21 are removed and a lens system is placed in their place. The light emitting element and the light receiving element may be placed as they are, or the scattered light may be collected.
レンズ系を用いた場合には、照射光線のビーム幅やビー
ムの方向、受ける散乱光の方向や受光面積を、レンズの
焦点距離や口径や光軸方向を変えることによって変化で
きるので、その変更が容易であるという効果をもつ。When using a lens system, the beam width and direction of the irradiated light beam, the direction of the received scattered light, and the light receiving area can be changed by changing the focal length, aperture, and optical axis direction of the lens. It has the effect of being easy.
また発光素子や受光素子を直接用いた場合には、装置を
小形にできるという効果をもつ。Furthermore, when a light emitting element or a light receiving element is directly used, the device can be made smaller.
本発明による他の実施例として、第８図において、固定
台１１が支持台２２に対して移動するのではなく、固定
台２０および２１が支持台２２に対して移動するものが
考えられ、効果は第８図に示す実施例の場合と同じであ
る。As another embodiment according to the present invention, in FIG. 8, instead of the fixed base 11 moving relative to the support base 22, the fixed bases 20 and 21 may move relative to the support base 22, and the effect is is the same as in the embodiment shown in FIG.
さらに本発明による他の一実施例として、第８図におい
て照射光を送る光ファイバ１３の代わりに、発光素子の
アレイを用い、散乱光を受光する光ファイバ１４の代わ
りに受光素子のアレイを用いたものが考えられ、電気的
にこれらの素子を切り換えることにより、機械的な可動
部のない装置を構成できる。Furthermore, as another embodiment of the present invention, in FIG. 8, an array of light emitting elements is used instead of the optical fiber 13 that transmits the irradiated light, and an array of light receiving elements is used instead of the optical fiber 14 that receives the scattered light. By electrically switching these elements, it is possible to construct a device without mechanically moving parts.
第１０図は本発明による他の実施例の斜視図で、１３お
よび２３は照射光を送る光ファイバ、１４および２４は
散乱光を受光する光ファイバである。FIG. 10 is a perspective view of another embodiment according to the present invention, in which 13 and 23 are optical fibers that transmit the irradiated light, and 14 and 24 are optical fibers that receive the scattered light.
第１０図の実施例は、第８図の実施例が１方向の光照射
と受光であるのに対して、２方向の光照射と受光を行っ
たもので、接続部をもつ光ファイバの接続部が軸対称で
ない場合に、測定精度を高める効果がある。The embodiment shown in Fig. 10 irradiates and receives light in two directions, whereas the embodiment shown in Fig. 8 irradiates and receives light in one direction. This has the effect of increasing measurement accuracy when the parts are not axially symmetrical.
以上述べたように、本発明の光ファイバの接続損失測定
法およびその測定装置は、光ファイバの接続損失を測定
する場合、光ファイバを切断する必要がなく、また接続
部をもつ光ファイバに光を通過させる必要がないので、
接続損失が一義的に決定できる利点があり、また光ファ
イバを接続して長尺の光線路を建設する場合、接続を行
っている場所だけで接続の良否を判定でき、線路建設の
省力化ができるという利点がある。As described above, the optical fiber splice loss measuring method and measuring device of the present invention do not require cutting the optical fiber when measuring the splice loss of an optical fiber, and the optical fiber having the spliced portion does not have to be cut. There is no need to pass
It has the advantage that the connection loss can be determined uniquely, and when connecting optical fibers to construct a long optical line, the quality of the connection can be determined just by the location where the connection is made, which saves labor in line construction. It has the advantage of being possible.
第１図および第２図は従来の光フアイバ接続損失測定法
を説明するための図、第３図および第４図は本発明の詳
細な説明するための図、第５図は本発明を実験的に確認
するための実験系の斜視図、第６図は第５図の実験系で
行った測定結果の一例を示す図、第７図は従来の方法に
よって測定された接続損失と第６図に示す受光パワーの
最大値と最小値の差１９との相関図、第８図は本発明に
よる一実施例の斜視図、第９図は本発明の他の実施例の
効果を説明するための図、第１０図は本発明による他の
実施例の斜視図である。
１・・・・・・接続点を含む光ファイバ、２・・・・・
・接続点、３・・・・・・光の進入方向、４・・・・・
・被接続光ファイバ、５・・・・・・被接続光フアイバ
端面、６・・・・・・接続光ファイバ、７・・・・・・
接続光フアイバ端面、８・・・・・・接続点を含まない
光ファイバ、９・・・・・・照射光線、１０・・・・・
・散乱光線、１１・・・・・・接続された光ファイバを
固定支持する台、１２・・・・・・移動装置、１３・・
・・・・照射光を送る光ファイバ、１４・・・・・・散
乱光を受光する光ファイバ、１５・・・・・・ＬＥＤ光
源、１６・・・・・・光センサ−，１７・・・・・・電
流増幅器、１８・・・・・・ＸＹレコーダ、１９・・・
・・・受光パワーの最大値と最小値の差、２０・・・・
・・照射光を送る光ファイバを固定支持する台、２１・
・・・・・受光のためのファイバを固定支持する台、２
２・・・・・・装置全体を支持し、かつ固定台１１を移
動させる機能をもつ台、２３・・・・・・照射光を送る
光ファイバ、２４・・・・・・散乱光を受光するための
光ファイバ。Figures 1 and 2 are diagrams for explaining the conventional optical fiber connection loss measurement method, Figures 3 and 4 are diagrams for explaining the present invention in detail, and Figure 5 is a diagram for explaining the present invention. Fig. 6 is a perspective view of the experimental system for confirmation, Fig. 6 is a diagram showing an example of the measurement results performed with the experimental system shown in Fig. 5, and Fig. 7 shows the splice loss measured by the conventional method and Fig. 6. FIG. 8 is a perspective view of one embodiment of the present invention, and FIG. 9 is a diagram for explaining the effects of another embodiment of the present invention. 10 are perspective views of other embodiments of the present invention. 1... Optical fiber including connection point, 2...
・Connection point, 3...Ingress direction of light, 4...
- Connected optical fiber, 5... End face of connected optical fiber, 6... Connected optical fiber, 7...
Connection optical fiber end face, 8... Optical fiber not including connection point, 9... Irradiation light beam, 10...
- Scattered light beam, 11... A stand that fixedly supports the connected optical fiber, 12... Moving device, 13...
... Optical fiber for sending irradiation light, 14 ... Optical fiber for receiving scattered light, 15 ... LED light source, 16 ... Optical sensor, 17 ... ...Current amplifier, 18...XY recorder, 19...
...Difference between maximum and minimum received light power, 20...
... A stand that fixedly supports the optical fiber that sends the irradiation light, 21.
....Base for fixedly supporting the fiber for light reception, 2
2... A stand that supports the entire device and has the function of moving the fixed stand 11, 23... Optical fiber that sends irradiation light, 24... Receives scattered light. Optical fiber for.
Claims (1)
端から出射する光パワーＰ２を測定し、次にこの光ファ
イバの１箇所を切断した後、切断箇所を接続した場合に
他端から出射する光パワーＰ１を測定して、１０１０１
ｏの計算から接続損失を算出するなどの従来の方法によ
って接続損失を測定し、一方発光機構と受光機構の間で
接続点を含む光ファイバをその軸方向に移動することに
よるか、もしくは発光素子のアンイおよび発光素子のア
ンイを接続点を含む光ファイバの軸方向に平行に配置し
て、発光および受光の作用を空間的に順次行わしめるな
どにより、接続点を含む光ファイバの接続点およびその
近傍に照射された光の散乱光の強度分布を測定し、この
強変分布から最大強度と最小強度の差りと前記接続損失
との相関図Ａ１または接続点から互いに反対方向に光分
離れた光フアイバ上の位置に対応する前記強度分布を示
す曲線上の２点を結ぶ線分とこの曲線とで囲まれる面積
Ｂと前記接続損失との相関図Ｃをあらかじめ作製してお
き、次に未知の接続損失をもつ光ファイバを、前記発光
機構と受光機構の間で前述と同様に光ファイバの軸方向
に移動することによるか、もしくは前記と同様に発光素
子および受光素子のアレイを光ファイバの軸方向に平行
に配置して発光および受光の作用を空間的に順次行わし
めるなどにより、散乱光の強度分布を測定して前記と同
様に面積Ｂ′を求め、この散乱光の光強度分布の最大値
と最小値の差Ｄ′と前記相関図Ａとから、または前記面
積Ｂ′と前記相関図Ｃとから未知であった接続損失を求
めることを特徴とする光フアイバ接続損失測定法。 ２ 接続された光ファイバを支持固定する光フアイバ支
持台と、接続された光ファイバの中心軸を含む面内に光
ファイバの中心軸があって、光源からの光を導いて接続
点を含む光ファイバに光を照射する光ファイバと、この
光ファイバを支持固定する光フアイバ支持台と、接続さ
れた光ファイバの中心軸を含む面内に光ファイバの中心
軸があって、散乱光を受光素子まで導く光ファイバと、
この光ファイバを支持固定する光フアイバ支持台と、接
続された光ファイバの支持台と前記の他の光ファイバの
支持台とを、接続された光ファイバの中心軸に平行に相
対的に移動させる移動機構と、この移動量を電気信号に
変換する変換部とからなる散乱光強度分布測定装置。[Claims] 1. Light is input from one end of an optical fiber without a connection point, the optical power P2 emitted from the other end is measured, and then, after cutting this optical fiber at one point, the cut point is connected. In this case, the optical power P1 emitted from the other end is measured and 10101
The splice loss is measured by conventional methods such as calculating the splice loss from the calculation of The connection point of the optical fiber including the connection point and its The intensity distribution of the scattered light of the light irradiated in the vicinity is measured, and from this strong variation distribution, the correlation diagram A1 between the difference between the maximum intensity and the minimum intensity and the connection loss, or the light beams separated in opposite directions from the connection point. A correlation diagram C between the connection loss and the area B surrounded by this curve and a line segment connecting two points on the curve showing the intensity distribution corresponding to the position on the optical fiber is prepared in advance, and then the unknown By moving an optical fiber having a splice loss of The intensity distribution of the scattered light is measured by arranging it parallel to the axial direction and the light emitting and light receiving functions are carried out spatially sequentially, and the area B' is obtained in the same manner as above, and the light intensity distribution of this scattered light is An optical fiber splice loss measuring method characterized in that an unknown splice loss is determined from the difference D' between the maximum value and the minimum value and the correlation diagram A, or from the area B' and the correlation diagram C. 2. An optical fiber support stand that supports and fixes the connected optical fiber, and the central axis of the optical fiber is in a plane that includes the central axis of the connected optical fiber, and the optical fiber is guided to guide the light from the light source and the light including the connection point. An optical fiber that irradiates light onto the fiber, an optical fiber support that supports and fixes this optical fiber, and a central axis of the optical fiber that lies within a plane that includes the central axis of the connected optical fiber, and a light receiving element that receives the scattered light. An optical fiber that leads to
An optical fiber support that supports and fixes this optical fiber, a support for the connected optical fiber, and a support for the other optical fiber are relatively moved in parallel to the central axis of the connected optical fiber. A scattered light intensity distribution measuring device consisting of a moving mechanism and a converter that converts the amount of movement into an electrical signal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1141178A JPS5815052B2 (en) | 1978-02-06 | 1978-02-06 | Optical fiber splice loss measurement method and measurement device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1141178A JPS5815052B2 (en) | 1978-02-06 | 1978-02-06 | Optical fiber splice loss measurement method and measurement device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54104860A JPS54104860A (en) | 1979-08-17 |
| JPS5815052B2 true JPS5815052B2 (en) | 1983-03-23 |
Family
ID=11777272
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1141178A Expired JPS5815052B2 (en) | 1978-02-06 | 1978-02-06 | Optical fiber splice loss measurement method and measurement device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5815052B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6035021B2 (en) * | 1978-12-15 | 1985-08-12 | 三菱電線工業株式会社 | Transmission loss measurement method at optical fiber connections |
| US20160133005A1 (en) * | 2014-11-10 | 2016-05-12 | Panduit Corp. | Apparatus and method for terminating and testing connectors |
-
1978
- 1978-02-06 JP JP1141178A patent/JPS5815052B2/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54104860A (en) | 1979-08-17 |
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