Spectral Behaviour of Planar Optical Waveguides and Microchannels in Cascade: Theoretical Evaluation

Garcı́a, José R.; Gavela, Adrián Fernández

doi:10.2528/pierm18060410

Cited by 2 publications

(1 citation statement)

References 26 publications

(11 reference statements)

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“…For the case of the superstructure waveguide, as the input field is incident at z = 0, the modes of the fields TM 0 and TM 1 excite at the input and interference in the waveguide, where the power exchanges by adding and subtracting between the modes of the superstructure (Figure 1). Usually, couplers or filters are made from (mechanicals or not) periodically corrugated optical waveguides ( [3][4][5][6]).…”

Section: Introductionmentioning

confidence: 99%

Design of planar waveguide directional couplers with arbitrary modal electric field

Boucouvalas

Angelis

Aidinis

et al. 2021

IET Optoelectronics

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The purpose of this work is to present a method for designing planar waveguide couplers of arbitrary modal electric field distributions. The idea here is to create couplers with unusual electric fields, which confine in one planar waveguide. This is possible if a planar waveguide profile supporting two pre-selected mode fields is designed. Their interference will have to transfer the optical power from one region (bottom layer) to another region (top layer) completely. The inverse transmission-line technique and the desired electric field are applied, based on which the refractive index profile of the couplers exhibiting excellent crosstalk is reconstructed. By choosing this technique, it is feasible to design planar components in sensing applications, such as high power, temperature or pressure sensors and numerous other possibilities, using unusual electric field distributions.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

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Section: Introductionmentioning

confidence: 99%

Design of planar waveguide directional couplers with arbitrary modal electric field

Boucouvalas

Angelis

Aidinis

et al. 2021

IET Optoelectronics

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Spectral Characteristics of Segmented Optical Waveguides Immersed in a Fluid Medium

Garcı́a¹,

Gavela²

2019

PIER M

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In this paper, the electromagnetic scattering properties due to periodical configurations consisting of planar optical waveguides completely surrounded by a fluid media, in gaseous or liquid phase, are analyzed. In this new design, fluid separates the consecutive optical waveguides, and it is also the common cover for all of them, thus significantly increasing the effect of the fluid on the evanescent field. This new configuration is designated as fluidic segmented optical waveguides. The theoretical algorithm was developed and recently updated by the authors, and it is based on the generalized scattering matrix concept, together with the generalized telegraphist equations formulism and modal matching technique. We present the first theoretical results concerning to these periodical structures with a fluidic common cover. To carry out the simulations, with the purpose to manufacture these devices in the future, glass and polymer were chosen as materials for the optical waveguides substrate and for enclosing the fluid as common cover medium, respectively. The spectral results obtained for the module and phase of the reflection and transmission coefficients have shown great sensitivity of the new proposal to the variations of the refractive index of the fluid, making it very attractive for the design of refractive index sensors and optical biosensors.

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Spectral Behaviour of Planar Optical Waveguides and Microchannels in Cascade: Theoretical Evaluation

Cited by 2 publications

References 26 publications

Design of planar waveguide directional couplers with arbitrary modal electric field

Design of planar waveguide directional couplers with arbitrary modal electric field

Spectral Characteristics of Segmented Optical Waveguides Immersed in a Fluid Medium

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