Author: E. P. Alcusa-saez

0000000000039909

AUTHOR

E. P. Alcusa-saez

showing 13 related works from this author

Accurate mode characterization of two-mode optical fibers by in-fiber acousto-optics.

2016

Acousto-optic interaction in optical fibers is exploited for the accurate and broadband characterization of two-mode optical fibers. Coupling between LP01 and LP1m modes is produced in a broadband wavelength range. Difference in effective indices, group indices, and chromatic dispersions between the guided modes, are obtained from experimental measurements. Additionally, we show that the technique is suitable to investigate the fine modes structure of LP modes, and some other intriguing features related with modes' cut-off.

CouplingMode volumeOptical fiberMaterials sciencebusiness.industryPhysics::OpticsAcousto-optics02 engineering and technologyÒptica01 natural sciencesAtomic and Molecular Physics and Opticslaw.invention010309 optics020210 optoelectronics & photonicsDouble-clad fiberOpticslaw0103 physical sciences0202 electrical engineering electronic engineering information engineeringOptoelectronicsChromatic scaleFiberbusinessRefractive indexOptics express

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Acousto-Optic Interaction for Accurate Two-Mode Optical Fibers Characterization

2016

Accurate characterization of two-mode fibers by acousto-optic interaction is reported. Difference of modal index, group delay, and dispersion between the guided modes is obtained. Properties of the vector modes comprising the LP11 mode are investigated.

Mode volumeMaterials scienceOptical fiberbusiness.industryPhysics::OpticsGraded-index fiberlaw.inventionOpticsZero-dispersion wavelengthDouble-clad fiberlawDispersion (optics)Modal dispersionbusinessPhotonic-crystal fiberLatin America Optics and Photonics Conference

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Characterization of fiber nonuniformities with ppm resolution using time-resolved in-fiber acousto-optics

2014

Time-resolved acousto-optic interaction using flexural waves enables the characterization of fiber nonuniformities along sections of about 1-2 m. A resolution better than 10 ppm of fiber diameter and core refractive index is demonstrated.

Mode volumeOptical fiberMaterials sciencebusiness.industryPolarization-maintaining optical fiberGraded-index fiberlaw.inventionOpticslawFiber optic sensorFiber laserDispersion-shifted fiberbusinessPhotonic-crystal fiber

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Accurate modal characterization of optical fibers using acousto-optics

2016

In-fiber acousto-optics enable accurate and broadband characterization of two mode optical fibers. Differential effective index, group index and dispersion are reported for two-mode optical fibers. Small phase differences between the quasi-degenerated vector modes comprising the LP 11 mode are also measured. In addition, a fine analysis of fiber axial non-uniformities can be performed using a time-resolved acousto-optic technique. In this case, sub-ppm changes of effective index are measured with few cm resolution along fiber sections of about 2 m.

Mode volumeOptical fiberMulti-mode optical fiberMaterials sciencebusiness.industrySingle-mode optical fiberPhysics::Optics02 engineering and technologyMicrostructured optical fiber021001 nanoscience & nanotechnology01 natural sciencesGraded-index fiberlaw.invention010309 opticsOpticsZero-dispersion wavelengthlaw0103 physical sciencesOptoelectronics0210 nano-technologybusinessPhotonic-crystal fiber2016 18th International Conference on Transparent Optical Networks (ICTON)

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In-fiber time-resolved acousto-optics

2014

Time-resolved in-fiber acousto-optics permit the measurement of sub-ppm perturbations of the modal dispersion curves along sections of fiber exceeding 1 m long, with a spatial resolution in the order of few cm.

Materials scienceMulti-mode optical fiberbusiness.industryPhysics::OpticsPolarization-maintaining optical fiberGraded-index fiberOpticsOptoelectronicsDispersion-shifted fiberModal dispersionFiberbusinessRefractive indexPhotonic-crystal fiberLatin America Optics and Photonics Conference

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Improved time-resolved acousto-optic technique for optical fiber analysis of axial non-uniformities by using edge interrogation

2015

The time-resolved acousto-optic technique demonstrated recently to be a very useful method for the analysis of fiber axial non-uniformities, able to detect variations of fiber diameter in the nanometric scale with a spatial resolution of few cm. An edge interrogation approach is proposed to improve further the performance of this technique. The detection of subnanometer fiber diameter changes or sub-ppm changes of the core refractive index is demonstrated.

TechnologyOptical fiberMaterials sciencePhysics::OpticsPolarization-maintaining optical fiber02 engineering and technology01 natural sciencesGraded-index fiberlaw.invention010309 opticsFiber characterization020210 optoelectronics & photonicsOpticsAcousto-optical devicesFiber Bragg gratinglaw0103 physical sciences0202 electrical engineering electronic engineering information engineeringDispersion-shifted fiberTECHNOLOGYCiencias tecnológicasbusiness.industryMicrostructured optical fiberÒpticaAtomic and Molecular Physics and OpticsFiber optic sensorCIENCIAS TECNOLÓGICASElectrónicasense organsElectronicsbusinessPhotonic-crystal fiberOptics Express

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Analysis of Fiber Inhomogeneity Using Time-Resolved Acousto-Optic Interaction

2013

Workshop on Specialty Optical Fibers and their Applications 2013, Sigtuna Sweden, 28–30 August 2013

Mode volumeMaterials scienceOptical fiberbusiness.industry020208 electrical & electronic engineeringPhysics::OpticsPolarization-maintaining optical fiber02 engineering and technologyGraded-index fiberlaw.inventionFiber Inhomogeneity020210 optoelectronics & photonicsFiber Bragg gratinglawFiber optic sensor0202 electrical engineering electronic engineering information engineeringOptoelectronicsDispersion-shifted fiberAcousto-optic interactionElectrónicaElectronicsbusinessPhotonic-crystal fiber

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Time-resolved acousto-optic interaction in single-mode optical fibers: characterization of axial nonuniformities at the nanometer scale.

2014

We report on a time-resolved acousto-optic interaction technique for the detection of axial nonuniformities in single-mode fibers. It is based on the propagation of short packets of flexural acoustic waves. Small axial nonuniformities (of the order of nanometers) are detected by measuring the transmittance of the fundamental mode as a function of time. It is shown that the technique allows the detection of axial nonuniformities along sections of single-mode fiber exceeding 1 m long with spatial resolution of the order of a few centimeters.

Optical fiberMaterials sciencebusiness.industrySingle-mode optical fiberPhysics::OpticsAcoustic waveAtomic and Molecular Physics and Opticslaw.inventionOpticsFiber Bragg gratinglawAttenuation coefficientTransmittanceFiberbusinessImage resolutionOptics letters

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Experimental analysis of distributed pump absorption and refractive index changes in Yb-doped fibers using acousto-optic interaction.

2015

In-fiber acousto-optic interaction is used to characterize the refractive index changes at the C band in a single-mode ytterbium-doped optical fiber under 980 nm pumping. The transmission notch created by the acoustic-induced coupling between the core mode and a cladding mode shifts to longer wavelengths when the pump is delivered to the fiber. The electronic contribution to the refractive index change is quantified from the wavelength shift. Using a time-resolved acousto-optic method, we investigate the distribution of pump absorption, and the resulting refractive index change profile, along sections of ytterbium-doped fiber exceeding 1 m long under different pump power levels.

Materials scienceOptical fibergenetic structuresbusiness.industryPhysics::OpticsCladding modeCladding (fiber optics)Graded-index fiberAtomic and Molecular Physics and Opticslaw.inventionNormalized frequency (fiber optics)Double-clad fiberOpticslawOptoelectronicssense organsStep-index profilebusinessPhotonic-crystal fiberOptics letters

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An approach to the measurement of the nonlinear refractive index of very short lengths of optical fibers

2018

A method for the measurement of the nonlinear-refractive index coefficient in single-mode optical fibers is presented. It takes advantage of the high sensitivity of the acousto-optic interaction effect in optical fibers to the fiber properties. Direct measurement of the nonlinear-refractive index change resulting from cross-phase modulation between a probe and a pump signal is obtained from the fiber's acousto-optic interaction performance. It is a non-interferometric method in which a very short length of fiber (<0.25 m) is required.

Optical fiberMaterials scienceNonlinear opticsPhysics and Astronomy (miscellaneous)genetic structuresPhysics::OpticsAcousto-optics02 engineering and technology01 natural sciencesSignallaw.invention010309 opticsOptical pumpingOpticslaw0103 physical sciencesOptical fibersFiberSensitivity (control systems)Cross phase modulationOptical propertiesbusiness.industryElastic waves021001 nanoscience & nanotechnologyeye diseasesUNESCO::FÍSICA::Óptica ::Fibras ópticasAcoustic waves:FÍSICA::Óptica ::Fibras ópticas [UNESCO]Modulationsense organs0210 nano-technologybusinessPhase modulationRefractive index

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All-Fiber Laser With Intracavity Acousto-Optic Dynamic Mode Converter for Efficient Generation of Radially Polarized Cylindrical Vector Beams

2017

We report an all-fiber laser that emits a radially polarized cylindrical vector beam (CVB) at 1 μm based on an intracavity acousto-optic mode converter. We efficiently generate the CVB, taking advantage of the acousto-optic coupling from the HE11 mode to the TM01 mode in a two-mode fiber. The laser can be switched from emitting a Gaussian-like beam to a radially polarized CVB. Radially polarized CVBs with modal and polarization purities >98% and a maximum power of 65 mW were generated.

lcsh:Applied optics. PhotonicsMaximum power principlePhysics::Optics02 engineering and technologyLaser modes01 natural scienceslaw.invention010309 optics020210 optoelectronics & photonicsOpticslawradial polarization.Fiber laser0103 physical sciences0202 electrical engineering electronic engineering information engineeringlcsh:QC350-467Electrical and Electronic EngineeringFiber Laserscylindrical vector beams (CVBs)PhysicsCouplingLaser excitationbusiness.industryCylindrical vector beamFiber laserlcsh:TA1501-1820Polarization (waves)LaserUNESCO::FÍSICA::Óptica ::Fibras ópticasAtomic and Molecular Physics and OpticsAll fiber:FÍSICA::Óptica ::Fibras ópticas [UNESCO]CouplingsOptoelectronicsbusinessOptical fiber polarizationBeam (structure)lcsh:Optics. LightLaser beamsIEEE Photonics Journal

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Acousto-optic interaction in polyimide coated optical fibers with flexural waves

2017

Acousto-optic coupling in polyimide-coated single-mode optical fibers using flexural elastic waves is demonstrated. The effect of the polyimide coating on the acousto-optic interaction process is analyzed in detailed. Theoretical and experimental results are in good agreement. Although the elastic attenuation is significant, we show that acousto-optic coupling can be produced with a reasonably good efficiency. To our knowledge, it is the first experimental demonstration of acousto-optic coupling in optical fibers with robust protective coating.

Optical fiberMaterials sciencePhysics::Medical PhysicsPhysics::Optics02 engineering and technologyFlexural wavesengineering.materialFiber optics01 natural scienceslaw.invention010309 opticsOpticsCoatingFlexural strengthAcousto-optical deviceslaw0103 physical sciencesComposite materialbusiness.industryAttenuation021001 nanoscience & nanotechnologyAtomic and Molecular Physics and OpticsUNESCO::FÍSICA::Óptica ::Fibras ópticasCoupling (electronics):FÍSICA::Óptica ::Fibras ópticas [UNESCO]engineering0210 nano-technologybusinessPolyimide

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Accurate and broadband characterization of few-mode optical fibers using acousto-optic coupling

2015

Acousto-optic interaction in optical fibers is exploited for the accurate and broadband characterization of two-mode fibers. Differential modal index, group delay, and group-velocity dispersion is obtained. The technique is suitable for the characterization of few-mode fibers used in space-division multiplexing.

Optical fiberMaterials scienceMulti-mode optical fiberbusiness.industrySingle-mode optical fiberPhysics::OpticsMicrostructured optical fiberlaw.inventionFiber-optic communicationZero-dispersion wavelengthOpticslawDispersion (optics)businessPhotonic-crystal fiber2015 European Conference on Optical Communication (ECOC)

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