JP2001074607A5 - - Google Patents
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- JP2001074607A5 JP2001074607A5 JP1999245283A JP24528399A JP2001074607A5 JP 2001074607 A5 JP2001074607 A5 JP 2001074607A5 JP 1999245283 A JP1999245283 A JP 1999245283A JP 24528399 A JP24528399 A JP 24528399A JP 2001074607 A5 JP2001074607 A5 JP 2001074607A5
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- light
- transmission loss
- light beam
- incident angle
- 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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- 239000003365 glass fiber Substances 0.000 description 19
- 230000005540 biological transmission Effects 0.000 description 10
- 238000001514 detection method Methods 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 230000003287 optical Effects 0.000 description 1
Description
【特許請求の範囲】
【請求項１】 光ファイバの一方の端面の中心部に平行光ビームを入射させ、前記光ファイバの他方の端面から出射する光の光量を検出する光ファイバの伝送損失測定法であって、前記一方の端面への前記平行光ビームの入射角を変化させ、各入射角ごとに前記出射光量を検出し、その検出値に基づき光ファイバの伝送損失値を算出することを特徴とする、光ファイバの伝送損失測定法。
【請求項２】前記出射光量の検出値からの前記伝送損失値の算出は、カットバック法を用いて異なる２つの長さの光ファイバについて得た前記入射角ごとの出射光量の検出値に基づきなされることを特徴とする、請求項１に記載の光ファイバの伝送損失測定法。
【請求項３】 平行光ビームを発する光源部と、該光源部から発せられる平行光ビームが光ファイバの光入射端面の中心部に入射するように該光ファイバを配置する光ファイバ位置決め手段と、前記光ファイバの光出射端面からの出射光の光量を検知する光量検知手段と、前記光ファイバの光入射端面への前記平行光ビームの入射角を変化させる光ビーム入射角変化手段とを有することを特徴とする、光ファイバの伝送損失測定装置。
【請求項４】 前記光源部は光源と該光源から発せられる光を平行光ビームに変換するコリメータとを有することを特徴とする、請求項３に記載の光ファイバの伝送損失測定装置。
【請求項５】ＸＹＺΘステージを用いて前記光ファイバ位置決め手段と前記光ビーム入射角変化手段とが構成されていることを特徴とする、請求項３〜４のいずれかに記載の光ファイバの伝送損失測定装置。
【請求項６】前記光量検知手段により検知される光量値と前記光ビーム入射角変化手段により設定される入射角値とに基づき前記光ファイバの入射角ごとの伝送損失値を算出する演算手段を備えていることを特徴とする、請求項３〜５のいずれかに記載の光ファイバの伝送損失測定装置。
[Claims]
1. A method for measuring transmission loss of an optical fiber, wherein a parallel light beam is incident on a central portion of one end face of the optical fiber and the amount of light emitted from the other end face of the optical fiber is detected. An optical fiber characterized in that the incident angle of the parallel light beam on one end face is changed, the emitted light amount is detected for each incident angle, and the transmission loss value of the optical fiber is calculated based on the detected value. Transmission loss measurement method.
2. The calculation of the transmission loss value from the detected value of the emitted light amount is based on the detected value of the emitted light amount for each incident angle obtained for two different lengths of optical fibers by using the cutback method. The method for measuring a transmission loss of an optical fiber according to claim 1, wherein the method is performed.
3. A light source unit that emits a parallel light beam, an optical fiber positioning means that arranges the optical fiber so that the parallel light beam emitted from the light source unit is incident on a central portion of an optical incident end face of the optical fiber, and It has a light amount detecting means for detecting the amount of light emitted from the light emitting end face of the optical fiber and a light beam incident angle changing means for changing the incident angle of the parallel light beam on the light incident end face of the optical fiber. An optical fiber transmission loss measuring device.
Wherein said light source unit is characterized by having a collimator for converting light emitted from the light source and the light source into a parallel light beam, transmission loss measuring apparatus for an optical fiber according to claim 3.
Wherein said optical fiber positioning means using XYZΘ stage and said light beam incident angle changing means is characterized by being composed, transmission of an optical fiber according to any one of claims 3-4 Loss measuring device.
6. The arithmetic unit for calculating a transmission loss value for each angle of incidence of the optical fiber based on the incident angle value set by the light intensity value and the light beam incident angle changing means for being detected by the light intensity detection means The optical fiber transmission loss measuring apparatus according to any one of claims 3 to 5, wherein the optical fiber is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24528399A JP4315537B2 (en) | 1999-08-31 | 1999-08-31 | Optical fiber transmission loss measurement method and apparatus for implementing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP24528399A JP4315537B2 (en) | 1999-08-31 | 1999-08-31 | Optical fiber transmission loss measurement method and apparatus for implementing the same |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2001074607A JP2001074607A (en) | 2001-03-23 |
| JP2001074607A5 true JP2001074607A5 (en) | 2006-10-19 |
| JP4315537B2 JP4315537B2 (en) | 2009-08-19 |
Family
ID=17131372
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP24528399A Expired - Fee Related JP4315537B2 (en) | 1999-08-31 | 1999-08-31 | Optical fiber transmission loss measurement method and apparatus for implementing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4315537B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3704031B2 (en) * | 2000-07-27 | 2005-10-05 | 日本電信電話株式会社 | Waveguide characteristic evaluation equipment |
| WO2010110292A1 (en) * | 2009-03-25 | 2010-09-30 | 住友電気工業株式会社 | Optical fiber sheet and body motion sensor |
| JP5520884B2 (en) * | 2011-05-19 | 2014-06-11 | 日本電信電話株式会社 | Propagation loss measurement method, propagation loss measurement system, propagation loss measurement device and program thereof |
-
1999
- 1999-08-31 JP JP24528399A patent/JP4315537B2/en not_active Expired - Fee Related
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