Refractive index engineering with subwavelength gratings for efficient microphotonic couplers and planar waveguide multiplexers

Cheben, Pavel; Bock, Przemek J.; Schmid, Jens H.; Lapointe, J.; Janz, Siegfried; Xu, Dan‐Xia; Densmore, A.; Delâge, A.; Lamontagne, B.; Hall, Trevor J.

doi:10.1364/ol.35.002526

Cited by 282 publications

(205 citation statements)

References 7 publications

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“…An example of a 2D SWG waveguide is presented in Figure 2, which, in fact, is a stratified medium with a finite width W . In a first order approximation the behaviour of this device is similar to the one of a conventional waveguide with a homogeneous core [15]. However, SWG parameters, i.e., Λ and G, can be used to engineer the refractive index, the dispersion and the birefringence of the waveguide.…”

Section: Sub-wavelength Gratingsmentioning

confidence: 98%

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Fourier Based Combined Techniques to Design Novel Sub-Wavelength Optical Integrated Devices

Zavargo-Peche¹,

Ortega‐Moñux²,

Wangüemert‐Pérez³

et al. 2012

PIER

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Abstract-We present a tool to aid the design of periodical structures, such as subwavelength grating (SWG) structures. It is based on the Fourier Eigenmode Expansion Method and includes the Floquet modes theory. Besides, the most interesting implemented functionalities to ease the design of photonic devices are detailed. The tool capabilities are shown using it to analyse and design three different SWG devices.

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Section: Sub-wavelength Gratingsmentioning

confidence: 98%

“…When properly engineered, SWG structures can behave as homogeneous media, whose refractive index can be tuned by adjusting the SWG geometry [1], thereby allowing for completely new design approaches [15].…”

Section: Sub-wavelength Gratingsmentioning

confidence: 99%

Fourier Based Combined Techniques to Design Novel Sub-Wavelength Optical Integrated Devices

Zavargo-Peche¹,

Ortega‐Moñux²,

Wangüemert‐Pérez³

et al. 2012

PIER

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“…Almeida et al have proposed a short taper (40 µm) for compact mode conversion with mode mismatch loss of -0.26 dB and back reflection less than -48 dB, which require a very high precision fabrication for realization of the nano-sized tip [6]. A robust fabrication based on SWG edge couplers have also been shown with coupling loss of -0.9 dB [38]. However, edge couplers, as mentioned before, can only be placed near the chip facets and hence requires precise chip arrangement and cannot be used to test individual devices on the wafer.…”

Section: Linear Grating Based Compact Tapersmentioning

confidence: 99%

Grating-Assisted Fiber to Chip Coupling for SOI Photonic Circuits

2018

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Fiber to chip coupling is a critical aspect of any integrated photonic circuit. In terms of ease of fabrication as well as wafer-scale testability, surface grating couplers are by far the most preferred scheme of the coupling to integrated circuits. In the past decade, considerable effort has been made for designing efficient grating couplers on Silicon-on-Insulator (SOI) and other allied photonic platforms. Highly efficient grating couplers with sub-dB coupling performance have now been demonstrated. In this article, we review the recent advances made to develop grating coupler designs for a variety of applications on SOI platform. We begin with a basic overview of design methodology involving both shallow etched gratings and the emerging field of subwavelength gratings. The feasibility of reducing footprint by way of incorporating compact tapers is also explored. We also discuss novel grating designs like polarization diversity as well as dual band couplers. Lastly, a brief description of various packaging and wafer-scale testing schemes available for fiber-chip couplers is elaborated.

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“…Para simplificar las medidas ópticas, se utilizó una única entrada, seguida de divisores 1:2 en cascada. Asimismo, se incluyeron acopladores por debajo de longitud de onda (subwavelength) [9] de alta eficiencia tanto a la entrada como a la salida del chip.…”

Section: Diseño Y Fabricaciónunclassified

Fourier-Transform spectrometer implemented in silicon-based spiral waveguides

Velasco¹

2013

Opt. Pura Apl.

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RESUMEN:En este trabajo se presenta el diseño, fabricación y caracterización de un micro-espectrómetro de transformada de Fourier implementado mediante guías de ondas planas. El dispositivo comprende un array de 32 interferómetros Mach-Zehnder con diferencias de caminos ópticos crecientes entre los brazos de los interferómetros, alcanzando una resolución de 0.1 nm en un rango espectral libre de 1.6 nm. Se han utilizado guías de onda de silicio en estructuras espirales en los brazos de los interferómetros para conseguir reducir el tamaño del dispositivo por debajo de 12 mm 2 .Palabras clave: Espectrómetro, Silicio, Transformada de Fourier. ABSTRACT:In this work we present the design, fabrication and characterization of a Fourier-Transform microspectrometer implemented with planar waveguides. The device comprises an array of 32 MachZehnder interferometers with increasing optical path differences between the arms of the interferometer, reaching a resolution of 0.1 nm in a free spectral range of 1.6 nm. Silicon waveguides in a spiral structure have been used in the arms of the interferometer, reducing the footprint of the device below 12 mm 2 .

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Refractive index engineering with subwavelength gratings for efficient microphotonic couplers and planar waveguide multiplexers

Cited by 282 publications

References 7 publications

Fourier Based Combined Techniques to Design Novel Sub-Wavelength Optical Integrated Devices

Fourier Based Combined Techniques to Design Novel Sub-Wavelength Optical Integrated Devices

Grating-Assisted Fiber to Chip Coupling for SOI Photonic Circuits

Fourier-Transform spectrometer implemented in silicon-based spiral waveguides

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