Flexible Filtering Element on SOI With Wide Bandwidth Tunability and Full FSR tuning

Poulopoulos, Giannis; Giannoulis, Giannis; Iliadis, Nikos; Kalavrouziotis, D.; Apostolopoulos, D.; Avramopoulos, H.

doi:10.1109/jlt.2018.2885395

Cited by 15 publications

(5 citation statements)

References 22 publications

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“…The presented solution has been designed to overcome the main limitations of the competing technologies, such as fiber Bragg gratings, Mach-Zehnder interferometers (MZI), Ring Resonators (RRs) with MZI architecture [16], liquid crystal-on-silicon filters, and Stimulated Brillouin Scattering-based filters [15,17], mainly in terms of reconfigurability range, bandwidth (BW), and stopband rejection (SBR). During the last few years, great research effort has been spent on the design of fully reconfigurable filters with limited bandwidth and a large stopband rejection.…”

Section: Reconfigurable Photonic Filtersmentioning

confidence: 99%

Fully Reconfigurable Photonic Filter for Flexible Payloads

di Toma,

Brunetti,

Saha

et al. 2024

Applied Sciences

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Reconfigurable photonic filters represent cutting-edge technology that enhances the capabilities of space payloads. These advanced devices harness the unique properties of light to deliver superior performance in signal processing, filtering, and frequency selection. They offer broad filtering capabilities, allowing for the selection of specific frequency ranges while significantly reducing Size, Weight, and Power (SWaP). In scenarios where satellite communication channels are crowded with various signals sharing the same bandwidth, reconfigurable photonic filters enable efficient spectrum management and interference mitigation, ensuring reliable signal transmission. Furthermore, reconfigurable photonic filters demonstrate their ability to adapt to the dynamic space environment, withstanding extreme temperatures, radiation exposure, and mechanical stress while maintaining stable and reliable performance. Leveraging the inherent speed of light, these filters enable high-speed signal processing operations, paving the way to various space payload applications, such as agile frequency channelization. This capability allows for the simultaneous processing and analysis of different frequency bands. In this theoretical study, we introduce a fully reconfigurable filter comprising two decoupled ring resonators, each with the same radius. Each resonator can be independently thermally tuned to achieve reconfigurability in both central frequency and bandwidth. The precise reconfiguration of both central frequency and bandwidth is achieved by using the thermo-optic effect along the whole ring resonator path. A stopband rejection of 45 dB, with a reconfigurable bandwidth and central frequency of 20 MHz and 180 MHz, respectively, has been numerically achieved, with a maximum electrical power of 11.50 mW and a reconfiguration time of 9.20 µs, by using the scattering matrix approach, where the elements have been calculated through Finite Element Method-based and Beam Propagation Method-based simulations. This performance makes the proposed device suitable as key building block of RF optical filters, useful in the next-generation telecommunication payload domain.

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Section: Reconfigurable Photonic Filtersmentioning

confidence: 99%

Fully Reconfigurable Photonic Filter for Flexible Payloads

di Toma,

Brunetti,

Saha

et al. 2024

Applied Sciences

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“…Filters with tunable bandwidths are needed in gridless ROADMs, enabling optimal spectral efficiency and optical performance monitoring. [126] Based on the previously mentioned basic wavelength filters, a variety of silicon filtering configurations with multiple basic elements have been proposed to realize wavelength and bandwidth tunability, mainly including the MRRs, [127,128] cascaded MRRs, [129][130][131][132] MZIs, [133] MZI-MRRs, [134,135] and cascaded grating structures. [136,137] However, there are always trade-offs in the performance; only a few geometries manage to achieve wide bandwidth and wavelength tunability while maintaining good off-band suppression.…”

Section: Tunable Filtersmentioning

confidence: 99%

Silicon Photonic Platform for Passive Waveguide Devices: Materials, Fabrication, and Applications

Zhang

Qiu

et al. 2020

Adv Materials Technologies

154

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Silicon photonics has attracted tremendous interest from academia and industry, as the fabrication of the silicon family of photonic devices is mostly compatible with the microelectronics process using complementary metal‐oxide semiconductors (CMOS). Herein, three silicon‐family materials are discussed: silicon, silicon nitride, and silica. In addition, hybrid integration with a 2D material, graphene, is examined. First, the material and waveguide properties are reviewed. Second, typical fabrication processes for waveguide devices are introduced. Subsequently, a variety of passive waveguide devices, operating at different physical dimensions covering wavelength, polarization, and mode, are discussed. They correspond to fixed and tunable filters, polarization beam splitters and rotators, and mode conversion and multiplexing devices. These passive waveguide devices play important roles in a wide range of applications including telecom, interconnects, computing, sensing, quantum information processing, bio‐photonics, and energy.

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“…Poulopoulos et al proposed a scheme based on two coupled microring resonators, with the coupling regions replaced by Mach-Zehnder interferometers, and a 95-GHz (9-104 GHz) tunable range was achieved. However, six microheaters are required for accessing the bandwidth tuning function [7].…”

Section: Introductionmentioning

confidence: 99%

“…According to theoretical predictions, the bandwidth tuning range depends on the intrinsic loss of the microresonators, as well as on the coupling losses of two cavities, which may become significant if one of the coupling losses is much larger than the intrinsic losses. We note that similar structures are proposed for the design of optical filters [7,14,15], either demonstrated with a tunable central frequency [14,15] or a tunable bandwidth [7]. However, the analyses used in these works are based on the transfer matrix method and the bandwidth tunability is derived by scanning parameters, without a fundamental explanation.…”

Section: Introductionmentioning

confidence: 99%

Bandwidth Tunable Optical Bandpass Filter Based on Parity-Time Symmetry

Zhang

Lü

et al. 2022

Micromachines

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A chip-scale tunable optical filter is indispensable to meeting the demand for reconfigurability in wavelength division multiplexing systems, channel routing, and switching, etc. Here, we propose a new scheme of bandwidth tunable band-pass filters based on a parity-time (PT) symmetric coupled microresonator system. Large bandwidth tunability is realized on the basis of the tuning of the relative resonant frequency between coupled rings and by making use of the concept of the exception point (EP) in the PT symmetric systems. Theoretical investigations show that the bandwidth tuning range depends on the intrinsic loss of the microresonators, as well as on the loss contrast between the two cavities. Our proof-of-concept device confirms the tunability and shows a bandwidth tuning range from 21 GHz to 49 GHz, with an extinction ratio larger than 15 dB. The discrepancy between theory and experiment is due to the non-optimized design of the coupling coefficients, as well as to fabrication errors. Our design based on PT symmetry shows a distinct route towards the realization of tunable band-pass filters, providing new ways to explore non-Hermitian light manipulation in conventional integrated devices.

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Flexible Filtering Element on SOI With Wide Bandwidth Tunability and Full FSR tuning

Cited by 15 publications

References 22 publications

Fully Reconfigurable Photonic Filter for Flexible Payloads

Fully Reconfigurable Photonic Filter for Flexible Payloads

Silicon Photonic Platform for Passive Waveguide Devices: Materials, Fabrication, and Applications

Bandwidth Tunable Optical Bandpass Filter Based on Parity-Time Symmetry

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