Silicon photonic filters

Liu, Dajian; Xu, Hongnan; Tan, Ying; Shi, Yaocheng; Dai, Daoxin

doi:10.1002/mop.32509

Cited by 54 publications

(16 citation statements)

References 109 publications

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“…In addition to increasing channel capacity, WDM technique is also used as filters for the spectrum manipulation in various optical systems [112]. With unbalanced MZIs, an programmable filter has been demonstrated and showed the tunability of the filter central wavelength, bandwidth and variable passband shape [113].…”

Section: Wavelength and Mode Division Multiplexingmentioning

confidence: 99%

Silicon photonic devices for scalable quantum information applications

Feng¹,

Zhang

Wang

et al. 2022

Photon. Res.

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With high integration density and excellent optical properties, silicon photonics is becoming a promising platform for complete integration and large-scale optical quantum information processing. Scalable quantum information applications need photon generation and detection to be integrated on the same chip, and we have seen that various devices on the silicon photonic chip have been developed for this goal. This paper reviews the relevant research results and state-of-the-art technologies on the silicon photonic chip for scalable quantum applications. Despite the shortcomings, the properties of some components have already met the requirements for further expansion. Furthermore, we point out the challenges ahead and future research directions for on-chip scalable quantum information applications.

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Section: Wavelength and Mode Division Multiplexingmentioning

confidence: 99%

Silicon photonic devices for scalable quantum information applications

Feng¹,

Zhang

Wang

et al. 2022

Photon. Res.

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“…Optical tunable filters are one of the key elements in silicon photonic integrated circuits, which can be widely used in optical signal processing, wavelength division multiplexing (WDM), and infrared spectrometry systems due to their versatility in a variety of applications 1 . Highly energy-efficient tunability and a wide continuous tuning range are strongly desired for silicon photonics filters.…”

Section: Introductionmentioning

confidence: 99%

Ultra-high-efficiency tunable silicon photonic filter

Cao

Dai

2023

SPIE-CLP Conference on Advanced Photonics 2022

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Optical tunable filters play a key role in silicon photonic integrated circuits. Highly energy-efficient tunability and a wide continuous tuning range are strongly desired for silicon photonics filters. All-optically thermo-optic (TO) tunable devices based on the light absorbers integrated close to the silicon structure as localized heaters have attracted increasing attention because optical heaters, compared with electrical ones, can greatly reduce thermal loads and heat leakage for the device. They provide a new approach to implementing high-efficiency TO tuning with a fast response. In this work, we propose and experimentally demonstrate an on-chip all-optically tunable filter based on a suspended silicon microdisk resonator with an ultra-compact optical heater, which is a platinum absorber deposited directly on the top of the ridge waveguide. Attributed to the novel optical pumping scheme, ultra-small device size, and suspended waveguide structure, an ultra-high tuning efficiency of 37.70 nm/mW is achieved. Only 1.405 mW pump power is required to tune the single-resonance filter over a wide spectral range of ∼54.5 nm. The demonstrated tunable optical filter has the advantages of high tuning efficiency, compact footprint, and simple fabrication processes, which has significant applications for on-chip all-optical systems.

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“…Filters constitute one of the most commonly used class of photonic devices, utilized widely in optical interconnects and optical sensing, among several other applications [1]. The high integration density, low waveguide loss, compatibility with widely-used CMOS process, and low fabrication cost of silicon-based photonics have led to the development of various passive components, on-chip photonic filters being one of the most important.…”

Section: Introductionmentioning

confidence: 99%

“…1 is used to achieve a filtering characteristic by strongly reflecting back the light at a well-specified wavelength λB called the Bragg wavelength. If Λ is the periodicity of the grating structure and neff is its effective refractive index, then the Bragg wavelength λB is given by: λB = 2Λneff (1) neff can be determined by the index modulation via corrugation depth variation and duty cycle of the grating.…”

Section: Introductionmentioning

confidence: 99%

Inversely designed miniature light filtering structures with back-reflection minimization

Awan

Fasih²,

Yoon³

et al. 2023

Optical Components and Materials XX

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On-chip silicon photonic filters acting as spectral shapers for the input spectrum are important in various applications including optical communication, computing, and spectroscopy sensing. We used the photonics inverse design framework, aided by the Particle Swarm Optimization (PSO) algorithm, to obtain miniature and efficient filtering structures in the Silicon on Insulator (SOI) platform. These optical filters are less than 10 μm, or just a few wavelengths, in size along any dimension. The investigated structures demonstrate good light filtering characteristic, with various filter types and wavelength ranges. The performance of designed filters is comparable to widely-used mm-long Bragg grating filters, while being a tiny fraction of their size. We also study a class of filters to directly resolve the issue of removing back reflected light without using a circulator or adding a third port (as is generally done) using the optimization process. Our structures are expected to have a much wider range of applications than grating-type filters, primarily due to their miniature footprint, independence from external devices like circulators for back-reflection control, and greater tolerance to thermal effects. Our work also highlights the possibility of designing and fabricating photonic components as a next step, by inversely designing components that best match a given set of requirements instead of depending on general conventional devices.

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Silicon photonic filters

Cited by 54 publications

References 109 publications

Silicon photonic devices for scalable quantum information applications

Silicon photonic devices for scalable quantum information applications

Ultra-high-efficiency tunable silicon photonic filter

Inversely designed miniature light filtering structures with back-reflection minimization

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