Refractive-index profile measurement of preform rods by a transverse differential interferogram | Zendy

Yasuo Kokubun | Zendy; Kenichi Iga | Zendy

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Refractive-index profile measurement of preform rods by a transverse differential interferogram

Author(s) -

Yasuo Kokubun,

Kenichi Iga

Publication year - 1980

Publication title -

applied optics

Language(s) - English

Resource type - Journals

ISSN - 0003-6935

DOI - 10.1364/ao.19.000846

Subject(s) - optics , refractive index , cladding (metalworking) , materials science , transverse plane , rod , step index profile , optical fiber , core (optical fiber) , refractive index profile , normalized frequency (unit) , graded index fiber , fiber optic sensor , physics , composite material , medicine , alternative medicine , phase locked loop , structural engineering , pathology , frequency synthesizer , phase noise , engineering

A nondestructive refractive-index profile measurement of optical-fiber preform rods by means of a transverse-differential-interference method is given. The error resulting from the data reading of a fringe center is investigated by computer simulation and is confirmed to be less than about 1% of the index difference between the core and the cladding. The refractive-index profile of a preform rod was measured, and it almost coincided with that of the fiber drawn from the rod. The elliptic deformation of the core and its variation along the longitudinal axis were measured.

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