Demonstration of a curved sidewall grating demultiplexer on silicon

Bock, Przemek J.; Cheben, Pavel; Schmid, Jens H.; Velasco, Aitor V.; Delâge, A.; Janz, Siegfried; Xu, Dan‐Xia; Lapointe, J.; Hall, Trevor J.; Calvo, M. L.

doi:10.1364/oe.20.019882

Cited by 35 publications

(18 citation statements)

References 35 publications

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“…At the same time, the SWG is gradually transformed to a slab waveguide using a triangular (moth‐eye‐like) index‐matching transition. This results in efficient coupling of the diffracted light to the slab waveguide as evident by a remarkable 4 dB loss reduction . The total intrinsic device loss, which includes diffraction loss, coupling loss from the waveguide grating to the slab waveguide, and excess loss due to the field mismatch at the receiver waveguide, was measured to be 3–4 dB .…”

Section: Applications Of Crosswise Swgsmentioning

confidence: 98%

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Waveguide sub‐wavelength structures: a review of principles and applications

Halir

Bock

Cheben

et al. 2014

Laser & Photonics Reviews

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551

317

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Periodic structures with a sub-wavelength pitch have been known since Hertz conducted his first experiments on the polarization of electromagnetic waves. While the use of these structures in waveguide optics was proposed in the 1990s, it has been with the more recent developments of silicon photonics and high-precision lithography techniques that sub-wavelength structures have found widespread application in the field of photonics. This review first provides an introduction to the physics of sub-wavelength structures. An overview of the applications of sub-wavelength structures is then given including: anti-reflective coatings, polarization rotators, high-efficiency fiber-chip couplers, spectrometers, high-reflectivity mirrors, athermal waveguides, multimode interference couplers, and dispersion engineered, ultra-broadband waveguide couplers among others. Particular attention is paid to providing insight into the design strategies for these devices. The concluding remarks provide an outlook on the future development of sub-wavelength structures and their impact in photonics.

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Section: Applications Of Crosswise Swgsmentioning

confidence: 98%

“…This results in efficient coupling of diffracted light to the slab waveguide. The complete device has a compact footprint of

100 \times 160 μ

m 2 . The measured transmission spectra in Fig.…”

Section: Applications Of Crosswise Swgsmentioning

confidence: 99%

Waveguide sub‐wavelength structures: a review of principles and applications

Halir

Bock

Cheben

et al. 2014

Laser & Photonics Reviews

Self Cite

551

317

View full text Add to dashboard Cite

show abstract

“…This is because CWDM has wider channel bandwidths and spacings (e.g., sidewall gratings. 37 However, these devices suffer from non-flat-top responses, which makes athermal operation challenging.…”

Section: Wavelength-division (De-)multiplexers For On-chip Optical Inmentioning

confidence: 99%

Silicon photonic Bragg-grating couplers for optical communications

et al. 2014

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We discuss recent progress and challenges in realizing Bragg-grating devices on the submicron silicon-on-insulator platform for next-generation optical communications applications, such as on-chip optical interconnects and signal processing. In particular, we focus on grating-assisted, wavelength-selective couplers, known as contra-directional couplers (contra-DCs). In contrast to conventional two-port Bragg gratings operating in the reflection mode, contra-DCs are four-port devices with very weak backreflections and, therefore, can be easily integrated with other photonic components on a chip. In order to provide a reliable on-chip wavelength-division multiplexing (WDM) solution for high-speed optical interconnects, we have developed high-performance add-drop filters and, furthermore, wavelength multiplexers/demultiplexers with combined advantages of flat-top responses, low insertion loss (< 1 dB), and low crosstalk (< -23 dB). These WDM devices are ultra-compact and highly tolerant to temperature fluctuations (up to ± 50 0 C), showing great potential for large-scale integration and low-power consumption. We further discuss a novel four-port Bragg photonic resonator for high-speed, low-power optical switching. Using a coupler-chirped design with uniform Bragg gratings, we have recently achieved an on-chip, continuously tunable photonic delay line with low insertion loss. These system-orientated devices indicate great potential for large-scale integration of Bragg-grating-defined functions using CMOS-compatible silicon photonics technology.

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“…Puesto que la configuración SHFT únicamente requiere elementos pasivos, es posible su implementación en óptica integrada mediante guías de ondas planas [5,6]. Los espectrómetros SHFT integrados pueden ser diseñados con una elevada apertura de entrada, proporcionando una notable ventaja en términos de rendimiento óptico (étendue) [7] respecto a otros espectrómetros integrados convencionales basados en AWGs [8] o redes de difracción [9], limitados a una única guía de onda monomodo de entrada. Adicionalmente, su implementación en silicio sobre aislante (SOI) permite integrar interferómetros de gran longitud en una superficie muy reducida, aumentando así la resolución del dispositivo [10].…”

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Temperature drift compensation in Fourier-transform integrated micro-spectrometers

Velasco¹,

Galindo-Santos²,

Cheben³

et al. 2015

Opt. Pura Apl.

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ABSTRACT:In this work, we analyze the effect of temperature drifts in a spatial heterodyne Fourier-transform micro-spectrometer fabricated in a Silicon-on-insulator chip. The device comprises an array of 32 Mach-Zehnder interferometers implemented with microphotonic spirals of linearly increasing length. This configuration provides a resolution of 42 pm in a footprint under 12 mm 2 . However, this resolution enhancement implies a greater sensitivity to environmental variations during the spectrometer operation. In this work, the effect of temperature drifts in the spectral retrieval algorithm is studied, and compensation techniques based on multiple calibration matrices is presented.

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Demonstration of a curved sidewall grating demultiplexer on silicon

Cited by 35 publications

References 35 publications

Waveguide sub‐wavelength structures: a review of principles and applications

Waveguide sub‐wavelength structures: a review of principles and applications

Silicon photonic Bragg-grating couplers for optical communications

Temperature drift compensation in Fourier-transform integrated micro-spectrometers

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