NEAR-FIELD MEASUREMENT OF FIBER MODE FIELD DIAMETERS - EFFECTS OF DEFOCUSING

被引：2
|
作者：
PARKER, AJ
机构：
[1] National Physical Laboratory, Teddington, Middlesex
来源：
IEEE TRANSACTIONS ON INSTRUMENTATION AND MEASUREMENT | 1995年 / 44卷 / 02期
关键词：
D O I：
10.1109/19.377879
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
An instrument has been built to measure the mode field profile of optical waveguides by the near field method. It incorporates a confocal microscope that allows accurate focusing of the waveguide end. The instrument has been used to measure the effect of defocus on measured fiber mode field diameters (MFD's). The amount of defocus must be less than a few micrometers if errors in the measured MFD are to be kept less than 0.1 mu m. Other focusing criteria can give errors of 2% or more.
引用
收藏
页码：458 / 460
页数：3
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