Title:
光ファイバのモード群遅延特性評価方法および評価装置
Document Type and Number:
Japanese Patent JP7270913
Kind Code:
B2
Abstract:
To provide a method and device for evaluating mode group delay characteristics, capable of evaluating the mode group delay characteristics of a multimode fiber using fiber parameters obtained by a simpler method than group delay properties.SOLUTION: A method for evaluating mode delay properties, capable of evaluating the mode group delay characteristics of an optical fiber to be tested includes a mode group delay calculation step of calculating the mode group delay characteristics of the propagation mode in the optical fiber to be tested on the basis of the fact that the approximate solution of the mode group delay characteristics of the optical fiber to be tested can be derived using the group refractive index of a core, the group refractive index of a cladding, a normalization frequency and a normalization propagation constant when a difference between the refractive indexes of the core and the cladding is small.SELECTED DRAWING: Figure 1
Inventors:
Atsushi Nakamura
Daisuke Iida
Masaharu Ohashi
Hirokazu Kubota
Daisuke Iida
Masaharu Ohashi
Hirokazu Kubota
Application Number:
JP2020031816A
Publication Date:
May 11, 2023
Filing Date:
February 27, 2020
Export Citation:
Assignee:
Nippon Telegraph and Telephone Corporation
Public University Corporation Osaka
Public University Corporation Osaka
International Classes:
G01M11/02
Domestic Patent References:
| JP2015212757A | ||||
| JP2014052632A | ||||
| JP2014509411A | ||||
| JP53015841A | ||||
| JP2014513318A | ||||
| JP2017181730A | ||||
| JP2019105530A | ||||
| JP55033623A | ||||
| JP2016128936A | ||||
| JP2000347057A |
Foreign References:
| US20130029038 | ||||
| WO2017217334A1 |
Other References:
光ファイバ構造と設計(1)-光ファイバの導波理論と特性,光学,日本,1989年11月,第18巻、第11号,第641-650頁
Weakly Guiding Fibers,APPLIED OPTICS,1971年10月,Vol. 10, No. 10,pp. 2252-2258,doi: 10.1364/AO.10.002252
Weakly Guiding Fibers,APPLIED OPTICS,1971年10月,Vol. 10, No. 10,pp. 2252-2258,doi: 10.1364/AO.10.002252
Attorney, Agent or Firm:
Kenji Okada
Masaaki Hata
Katsuhiro Imashita
Masaaki Hata
Katsuhiro Imashita