LP01—LP02 interference over an extended wavelength region is used to describe a new spectroscopic technique for determining the refractive-index profile of non-step-index optical fibers. The technique is illustrated with a fiber that shows an α-profile variation of the refractive index.
© 1996 Optical Society of America
R. Posey, L. Phillips, D. Diggs, and A. Sharma, "LP01-LP02 interference using a spectrally extended light source: measurement of the non-step-refractive-index profile of optical fibers," Opt. Lett. 21, 1357-1359 (1996)