Measurement of the dispersion in special optical fibers

Georgina Beltrán Pérez; Teresa de Jesús Cerdá Astorga; Iván Armas Rivera; Juan Israel Vazquez Lozano; Juan Castillo Mixcóatl; Severino Muñoz Aguirre

doi:10.1117/12.2026017

18 November 2013 Measurement of the dispersion in special optical fibers

Georgina Beltrán Pérez, Teresa de Jesús Cerdá Astorga, Iván Armas Rivera, Juan Israel Vazquez Lozano, Juan Castillo Mixcóatl, Severino Muñoz Aguirre

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Proceedings Volume 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications; 87853S (2013) https://doi.org/10.1117/12.2026017
Event: 8th Ibero American Optics Meeting/11th Latin American Meeting on Optics, Lasers, and Applications, 2013, Porto, Portugal

Abstract

Dispersion is a quite important parameter in optical fiber systems, mainly in pulsed lasers where the temporal width of the pulses are affected by this factor. There are many interferometric arrangements to evaluate this parameter and generally, these systems vary the wavelength to obtain information about the refractive index dependency n(λ), which is contained in the interferogram phase. However, this makes the system quite slow and it requires tunable light sources with a narrow bandwidth. In this work we propose an alternative method to measure dispersion and we present the results of measurements of special optical fibers, such as microstructured, Er doped, Yb doped, and Er/Yb doped fibers, among others. The experimental arrangement consists of a Mach-Zehnder interferometer, where the fiber under test is located in one of its arms while the air is employed as the reference arm. In order to determine the n(λ) dependency, a wide spectrum light source in the wavelength range of interest was used together with an optical spectrum analyzer. The phase information was evaluated from the measured interferogram. The obtained dispersion values were in agreement with those reported by the fabricant and they were used to calibrate the system in order to obtain non reported values.

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Georgina Beltrán Pérez, Teresa de Jesús Cerdá Astorga, Iván Armas Rivera, Juan Israel Vazquez Lozano, Juan Castillo Mixcóatl, and Severino Muñoz Aguirre "Measurement of the dispersion in special optical fibers", Proc. SPIE 8785, 8th Iberoamerican Optics Meeting and 11th Latin American Meeting on Optics, Lasers, and Applications, 87853S (18 November 2013); https://doi.org/10.1117/12.2026017

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KEYWORDS

Optical fibers

Dispersion

Interferometry

Light sources

Ytterbium

Erbium

Fourier transforms

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