- 标题
- 摘要
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- 实验方案
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Multi-channel silicon photonic receiver based on compact second-order microring resonators
摘要： A monolithically integrated multi-channel receiver fabricated on the Silicon-on-Insulator (SOI) platform is demonstrated experimentally. This receiver is composed of an eight-channel thermally tunable microring resonator (MRR) filter as the wavelength division multiplexing (WDM) demultiplexer and an array of high speed waveguide-integrated Ge-on-Si photodetectors (PDs) for light detection. Second-order MRRs were utilized in each channel to obtain steeper roll-off from passband to stopband and lower crosstalk. The receiver was fabricated by using CMOS-compatible fabrication process at IME A*STAR. With the thermal tunability, the channel spacing can be adjusted according to different channel grid. Lower than ?30 dB crosstalk and higher than 50 GHz 3-dB bandwidth was obtained for the demultiplexer with a channel spacing of 150 GHz. Proof-of-principle demonstration shows that each channel is capable of operating at a data rate of 10 Gb/s, resulting in an aggregate data rate of 80 Gb/s.
关键词： Silicon photonics,Wavelength division multiplexing,Optical receivers,Microring resonators,Optical interconnects
更新于2025-09-23 15:23:52
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Flexible Filtering Element on SOI with Wide Bandwidth tunability and Full FSR tuning
摘要： We demonstrate a Silicon-on-Insulator flexible filtering element, relying on two serially coupled micro ring resonators equipped with three thermo-optically tuned Mach-Zehnder interferometers, acting as variable optical couplers. A single electrode configuration is adopted, enabling the low-complexity thermo-optical control of the filtering element for bandwidth and wavelength tuneability. The module's performance has been studied in detail via simulation analysis and the obtained results were verified through experimental evaluation. Wide bandwidth tunability from 9 GHz to 103 GHz is achieved with a power efficiency of 0.284 mW/GHz, while full Free Spectral Range wavelength tuning is achieved with an efficiency of 0.297 mW/GHz. Module's insertion loss lays below 3 dB.
关键词： Silicon photonics,Optical switches,Microring resonators,Bandwidth flexibility,Thermo-optic control,Wavelength division multiplexing,Optical filters
更新于2025-09-23 15:22:29
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Demonstration of scalable microring weight bank control for large-scale photonic integrated circuits
摘要： Microring resonators (MRRs) are reconfigurable optical elements ubiquitous in photonic integrated circuits. Owing to its high sensitivity, MRR control is very challenging, especially in large-scale optical systems. In this work, we experimentally demonstrate continuous, multi-channel control of MRR weight banks using simple calibration procedures. A record-high accuracy and precision are achieved for all the controlled MRRs with negligible inter-channel crosstalk. Our approach allows accurate transmission calibration without the need for direct access to the output of the microring weight bank and without the need to lay out electrical and optical I/Os specific for calibration purpose. These features mean that our MRR control approach can be applied to large-scale photonic integrated circuits while maintaining its accuracy with manageable cost of chip area and I/O complexity.
关键词： weight banks,Microring resonators,silicon photonics,photonic integrated circuits,optical control
更新于2025-09-23 15:21:01
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[IEEE 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Singapore, Singapore (2019.8.28-2019.8.30)] 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Coupled-Resonator-Induced-Transparency on Germanium-on-Insulator Mid-Infrared Platform
摘要： We demonstrate the operation of a thermally tunable coupled-resonator-induced transparency system on a germanium-on-insulator photonic platform working at a mid-infrared wavelength of approximately 1.95 μm. A maximum coupling rate of 1.25 GHz is realized between the two evanescently coupled microring resonators.
关键词： Thermo-optic tuning,Mid-infrared,Microring resonators,Germanium-on-insulator
更新于2025-09-16 10:30:52
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Control and calibration recipes for photonic integrated circuits
摘要： This paper presents the key ingredients and the best practices for implementing simple, effective and robust control and calibration procedures for arbitrary photonic integrated circuit (PIC) architectures. Three main features are presented and discussed: a technique to cancel out the effects of mutual crosstalk among thermal tuners, the exploitation of labelling to identify different optical signals, the use of input modulated signal to automatically reshape the frequency response of the device. Examples of application are then illustrated to show the validity and generality of the approach, namely a cross-bar interconnect matrix router, a variable bandwidth filter and third order coupled microring filter. Further, the automatic and dynamic generation of the lookup table of add/drop hitless filters operating on a dense wavelength division multiplexing grid is demonstrated. The lookup table achieved with the proposed approach can dynamically update itself to new conditions of the chip or new requirements of operation, such as variations in channel modulation format or perturbation induced by neighboring devices due to a change in their working point.
关键词： control,optical filters,microring resonators,pilot tones,integrated photonics,calibration,look up tables,thermal cross talk,tuning,locking
更新于2025-09-16 10:30:52
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[IEEE 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Singapore, Singapore (2019.8.28-2019.8.30)] 2019 IEEE 16th International Conference on Group IV Photonics (GFP) - Coupled-Resonator-Induced-Transparency on Germanium-on-Insulator Mid-Infrared Platform
摘要： We demonstrate the operation of a thermally tunable coupled-resonator-induced transparency system on a germanium-on-insulator photonic platform working at a mid-infrared wavelength of approximately 1.95 μm. A maximum coupling rate of 1.25 GHz is realized between the two evanescently coupled microring resonators.
关键词： Mid-infrared,Germanium-on-insulator,Microring resonators,Thermo-optic tuning
更新于2025-09-12 10:27:22
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[IEEE 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Munich, Germany (2019.6.23-2019.6.27)] 2019 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC) - Sixth-Order 2D Microring Optical Filter with Sharp Transmission Zero
摘要： Microring resonators have been shown to be extremely versatile elements for constructing high-order optical filters. By coupling multiple microring resonators together, high-order optical transfer functions with flat-top passband and sharp skirt roll-offs can be realized. However, most coupled microring optical filters to date are based on the 1D serially-coupled configuration (also known as CROW filters), which can only realize transfer functions with all poles and no transmission zeros. The inability of the 1D configuration to realize transmission zeros limits the rate of skirt roll-off that can be achieved in the filter spectrum. In contrast, the 2D coupling configuration provides multiple pathways of light through the lattice, which can result in complete destructive interference of the transmitted light at certain frequencies. By positioning these transmission nulls near the edge of the passband, filter spectra with very sharp skirt roll-offs can be realized, which are important for applications requiring separation of two closely spaced wavelengths, such as in dense WDM communication systems, fluorescence spectroscopy and nonlinear pump-and-probe experiments.
关键词： 2D coupling configuration,optical filters,transmission zeros,microring resonators
更新于2025-09-11 14:15:04
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Dual wavelength optical duobinary modulation using GaAs–AlGaAs microring resonator
摘要： In this article, optical duobinary modulation technique has been used for modulating the dual-wavelength optical signal generated by the microring resonator system. The optical signals are de-multiplexed to two different optical signals with center wavelength of 1540 and 1545 nm afterward, these are modulated and transmitted over an optical fiber communication system, where the high performance of the transmitted signals is obtained. The NRZ binary signals are used to modulate the optical signals. The high-quality factor and performance of the system has been investigated by applying an optimization through the system parameters, where significant improvement could be obtained and highest quality factor of 32.871 shows the successful transmission. The second wavelength of the dual-wavelength has undergone the same modulation technique and has experienced the optical transmission after the system optimization has been performed, where the quality factor for the received optical signal at 1545 nm center wavelength is 39.282. These results show the introduced modulation technique is suitable to apply for the optical signals generated by the microring resonators.
关键词： microring resonators,dual-wavelength,Optical duobinary modulation technique
更新于2025-09-10 09:29:36
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Electronically programmable photonic molecule
摘要： Physical systems with discrete energy levels are ubiquitous in nature and are fundamental building blocks of quantum technology. Realizing controllable artificial atom- and molecule-like systems for light would enable coherent and dynamic control of the frequency, amplitude and phase of photons. In this work, we demonstrate a ‘photonic molecule’ with two distinct energy levels using coupled lithium niobate microring resonators and control it by external microwave excitation. We show that the frequency and phase of light can be precisely controlled by programmed microwave signals, using concepts of canonical two-level systems including Autler–Townes splitting, Stark shift, Rabi oscillation and Ramsey interference. Through such coherent control, we show on-demand optical storage and retrieval by reconfiguring the photonic molecule into a bright–dark mode pair. These results of dynamic control of light in a programmable and scalable electro-optic system open doors to applications in microwave signal processing, quantum photonic gates in the frequency domain and exploring concepts in optical computing and topological physics.
关键词： topological physics,coherent control,optical computing,microring resonators,lithium niobate,optical storage,microwave excitation,photonic molecule,quantum photonics
更新于2025-09-04 15:30:14