Search results for "Effective refractive index"

showing 2 items of 2 documents

Uniform fibre Bragg gratings with an embedded perturbed section for multiple applications

1999

The interest in fibre Bragg gratings has been increased with the development of flexible fabrication techniques which are able to make gratings with any non-uniform characteristic (chirped, apodised, sampled, phase-shifted, etc.) required for an specific application [1].

PHOSFOSFabricationMaterials sciencebusiness.industryMultiple applicationsPhysics::OpticsReflectivitySection (fiber bundle)OpticsWavelength-division multiplexingPhysics::Atomic PhysicsbusinessEffective refractive indexMicrowaveBragg Gratings, Photosensitivity, and Poling in Glass Waveguides
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Reconfigurable photonic routers based on multimode interference couplers

2015

We present a design approach for compact reconfigurable light routers with N access waveguides (WGs) based on multimode interference (MMI) couplers. The proposed devices comprise two MMI couplers, which are employed as power splitters and combiners, respectively, linked by an array of N single-mode WGs. When the effective refractive index of the WGs is modulated with the proper relative optical phase difference, the light can switch paths between the preset output channel and the remaining output WGs. Taking advantage of the transfer phases between the access ports of the MMI couplers, we derive very simple phase relations between the modulated WGs that enable the reconfiguration of the out…

Computer sciencebusiness.industryPhase (waves)Control reconfigurationStatistical and Nonlinear Physics02 engineering and technology021001 nanoscience & nanotechnology01 natural sciencesTransfer matrixAtomic and Molecular Physics and Optics010309 opticsOpticsSurface wave0103 physical sciencesElectronic engineeringPower dividers and directional couplersMultimode interferencePhotonics0210 nano-technologybusinessEffective refractive indexJournal of the Optical Society of America B
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