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Optical Fiber Geometry: Accurate Measurement of Cladding Diameter
Matt Young1, Paul D Hale1, Steven E Mechels1
1National Institute of Standards and Technology, Boulder, CO 80303-3328.
Abstract:
We have developed three instruments for accurate measurement of optieal fiber cladding diameter: a contact micrometer, a scanning confocal microscope, and a white-light interference microscope. Each instrument has an estimated uncertainty (3 standard deviations) of 50 nm or less, but the confocal microscope may display a 20 nm systematic error as well. The micrometer is used to generate Standard Reference Materials that are commercially available.
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