Stable system technique for measuring the refractive index profile of an optical fiber by modified fiber-type confocal microscope method

Bum Cho Seung, Youk Youngchun, Young Kim Dug

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

Using a fiber-type confocal scanning optical microscope system, we have obtained a stable refractive index profile measurement system of good performance. We could acquire excellent index precision and good spatial resolution by using a fiber-optic system for the majority part instead of a bulk-optic system and a single mode fiber at visible region with a 4 μm core diameter instead of a pinhole structure. Also, using a power detection system that is synchronous with fiber-coupled detector, we have improved system stability by reducing noise generated by the roughness of a sample surface because of using the optical fiber as a pinhole system. The light reflected by the sample surface was divided by a beam splitter; one ray passed back through the optical fiber in order to detect a confocal point and another ray entered the synchronous power detector in order to detect reflected power. The power detected by the synchronous power detector without a pinhole is less sensitive to the surface roughness than the power detected by the fiber-coupled detector. We could implement the simple and robust index measurement system by using a fiber-optic system and a synchronous detection system, and a single mode fiber was measured to demonstrate the effectiveness of our proposed measurement system.

Original languageEnglish
Title of host publicationOptical Components and Materials IV
DOIs
Publication statusPublished - 2007 May 23
EventOptical Components and Materials IV - San Jose, CA, United States
Duration: 2007 Jan 222007 Jan 24

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume6469
ISSN (Print)0277-786X

Other

OtherOptical Components and Materials IV
CountryUnited States
CitySan Jose, CA
Period07/1/2207/1/24

Fingerprint

Optical fibers
Refractive index
Microscopes
optical fibers
microscopes
refractivity
Detectors
Optical fiber coupling
pinholes
fibers
Fibers
Single mode fibers
profiles
Fiber optics
detectors
Surface roughness
fiber optics
rays
Optical resolving power
systems stability

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

Cite this

Seung, B. C., Youngchun, Y., & Dug, Y. K. (2007). Stable system technique for measuring the refractive index profile of an optical fiber by modified fiber-type confocal microscope method. In Optical Components and Materials IV [646914] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6469). https://doi.org/10.1117/12.700136
Seung, Bum Cho ; Youngchun, Youk ; Dug, Young Kim. / Stable system technique for measuring the refractive index profile of an optical fiber by modified fiber-type confocal microscope method. Optical Components and Materials IV. 2007. (Proceedings of SPIE - The International Society for Optical Engineering).
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Seung, BC, Youngchun, Y & Dug, YK 2007, Stable system technique for measuring the refractive index profile of an optical fiber by modified fiber-type confocal microscope method. in Optical Components and Materials IV., 646914, Proceedings of SPIE - The International Society for Optical Engineering, vol. 6469, Optical Components and Materials IV, San Jose, CA, United States, 07/1/22. https://doi.org/10.1117/12.700136

Stable system technique for measuring the refractive index profile of an optical fiber by modified fiber-type confocal microscope method. / Seung, Bum Cho; Youngchun, Youk; Dug, Young Kim.

Optical Components and Materials IV. 2007. 646914 (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 6469).

Research output: Chapter in Book/Report/Conference proceedingConference contribution

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Seung BC, Youngchun Y, Dug YK. Stable system technique for measuring the refractive index profile of an optical fiber by modified fiber-type confocal microscope method. In Optical Components and Materials IV. 2007. 646914. (Proceedings of SPIE - The International Society for Optical Engineering). https://doi.org/10.1117/12.700136