Apodized Silicon-on-Insulator Bragg Gratings

Simard, Alexandre D.; Belhadj, Nezih; Painchaud, Yves; LaRochelle, Sophie

doi:10.1109/lpt.2012.2194278

Cited by 83 publications

(28 citation statements)

References 8 publications

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“…A continuously tunable delay line using linearly chirped Bragg gratings was recently demonstrated in micrometer-scale SOI waveguides. 44 Realization of nanophotonic Bragg-grating devices is important for their applications in large-scale integrated photonic systems, 8,9,45 since most CMOS-compatible active devices, such as high-speed optical modulators and detectors, are developed on submicron SOI wafers. 46 Tunable delay lines on submicron silicon were recently demonstrated using PS gratings 38 and serial/step-chirped gratings, 45 where the delay was tuned by changing laser wavelength.…”

Section: Integrated Tunable Optical Delay Linesmentioning

confidence: 99%

“…5 As silicon photonics has quickly emerged as a main-stream technology for integrated photonic circuits, there is great interest to develop integrated Bragg gratings on the silicon-on-insulator (SOI) platform. [6][7][8][9] Silicon photonic Bragg gratings can be implemented by physically corrugating silicon waveguides. A series of Bragg grating devices have been developed on the submicron SOI platform using CMOS-compatible fabrication process.…”

Section: Introductionmentioning

confidence: 99%

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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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Section: Integrated Tunable Optical Delay Linesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Silicon photonic Bragg-grating couplers for optical communications

et al. 2014

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“…A similar concept has been implemented in grating-assisted contra-directional couplers to suppress the back reflections [12]. The superposition of two gratings can also be used to achieve apodized gratings [2,13]. Note that all the corrugations here have the same period.…”

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confidence: 99%

Precise control of the coupling coefficient through destructive interference in silicon waveguide Bragg gratings

et al. 2014

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We present waveguide Bragg gratings with misaligned sidewall corrugations on a silicon-on-insulator platform. The grating strength can be tuned by varying the misalignment between the corrugations on the two sidewalls. This approach allows for a wide range of grating coupling coefficients to be achieved with precise control, and substantially reduces the effects of quantization error due to the finite mask grid size. The experimental results are in very good agreement with simulations using the finite-difference time-domain (FDTD) method.

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“…As this material system has a very high refractive index contrast, the difficulty is to obtain sufficient control over the fabrication technology to cause a very small effective refractive index variation with the required accuracy. As gratings offer many possibilities [6], [7], we propose to implement these weak gratings by modulating the shallow etched sides of a ridge waveguide [8].…”

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confidence: 99%

Design of Weak 1-D Bragg Grating Filters in SOI Waveguides Using Volume Holography Techniques

Verbist

Bogaerts

Thourhout

2014

J. Lightwave Technol.

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Abstract-To answer the growing need for more versatile integrated spectral filters, we show that weak one-dimensional gratings can be designed towards any desired target spectrum. We follow a very straightforward design procedure to demonstrate the performance of these devices. Measurements and simulations show a very good correspondence with the target spectra. By analyzing the results, we also found that the design procedure can be refined by using simulated reflections, instead of relying on the calculated Fresnel reflections.

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Apodized Silicon-on-Insulator Bragg Gratings

Cited by 83 publications

References 8 publications

Silicon photonic Bragg-grating couplers for optical communications

Silicon photonic Bragg-grating couplers for optical communications

Precise control of the coupling coefficient through destructive interference in silicon waveguide Bragg gratings

Design of Weak 1-D Bragg Grating Filters in SOI Waveguides Using Volume Holography Techniques

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