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Vengsarkar AM, Digiovanni DJ, Reed WA, et al. Measurement of erbium confinement in optical fibers: a differential mode-launching technique. Opt Lett. 1992;17(18):1277-9doi: 10.1364/ol.17.001277.
Vengsarkar, A. M., Digiovanni, D. J., Reed, W. A., Quoi, K. W., & Walker, K. L. (1992). Measurement of erbium confinement in optical fibers: a differential mode-launching technique. Optics letters, 17(18), 1277-9. https://doi.org/10.1364/ol.17.001277
Vengsarkar, A M, et al. "Measurement of erbium confinement in optical fibers: a differential mode-launching technique." Optics letters vol. 17,18 (1992): 1277-9. doi: https://doi.org/10.1364/ol.17.001277
Vengsarkar AM, Digiovanni DJ, Reed WA, Quoi KW, Walker KL. Measurement of erbium confinement in optical fibers: a differential mode-launching technique. Opt Lett. 1992 Sep 15;17(18):1277-9. doi: 10.1364/ol.17.001277. PMID: 19798156.
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Opt Lett. 1992 Sep 15;17(18):1277-9. doi: 10.1364/ol.17.001277.

Measurement of erbium confinement in optical fibers: a differential mode-launching technique.

Optics letters

A M Vengsarkar, D J Digiovanni, W A Reed, K W Quoi, K L Walker

PMID: 19798156 DOI: 10.1364/ol.17.001277

Abstract

We present a selective mode-launching technique to determine the confinement of erbium in optical fibers. The loss per meter, alpha(lm), of the individual LP(lm) modes (LP(01) and LP(11) at 980 nm) is measured, and the ratio gamma = alpha(01)/alpha(11) is related to the concentration of erbium in the core. We assume a Gaussian diffusion profile for erbium and relate the dependence of gamma on erbium confinement by using exact mode profiles. This technique uses only two sets of measurements and is independent of erbium concentration.

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