Simple scanning fibre-optic confocal microscopy for the refractive index profile measurement of an optical fibre

Yongwoo Park, Nak Hyun Seong, Youngchun Youk, Dug Young Kim

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

A simple servo-controlled scanning fibre-optic confocal microscope is proposed for determining the refractive index profile of an optical fibre by measuring the reflectance of the end surface of the fibre. Great simplicity has been achieved in confocal microscopy by using a lensed fibre and a 3 dB fibre coupler instead of an objective lens and a beam splitter. A dithering servo control with a phase-locked loop is employed to maintain a constant distance between the lensed fibre and the surface to be measured during the scanning process. The accuracy of the measured refractive index is better than 10-4.

Original languageEnglish
Pages (from-to)695-699
Number of pages5
JournalMeasurement Science and Technology
Volume13
Issue number5
DOIs
Publication statusPublished - 2002 Jan 1

Fingerprint

Confocal Microscopy
Confocal microscopy
Fiber Optics
Refractive Index
Optical Fiber
Fiber optics
Optical fibers
Scanning
fiber optics
Refractive index
optical fibers
Fiber
refractivity
microscopy
scanning
fibers
Fibers
profiles
Phase-locked Loop
Beam Splitter

All Science Journal Classification (ASJC) codes

  • Instrumentation
  • Engineering (miscellaneous)
  • Applied Mathematics

Cite this

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Simple scanning fibre-optic confocal microscopy for the refractive index profile measurement of an optical fibre. / Park, Yongwoo; Seong, Nak Hyun; Youk, Youngchun; Kim, Dug Young.

In: Measurement Science and Technology, Vol. 13, No. 5, 01.01.2002, p. 695-699.

Research output: Contribution to journalArticle

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