- 标题
- 摘要
- 关键词
- 实验方案
- 产品
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Handbook of Graphene || Hybrid Graphene–Silicon Photonic and Optoelectronic Integrated Devices
摘要： Graphene, a monolayer of carbon atoms arranged in a honeycomb pattern, has many intriguing optical and electrical properties, providing us numerous applications in optoelectronics, nonlinear optics, and biochemical sensing. However, due to the atomic thickness of the material, light–matter interactions in graphene are intrinsically weak, which greatly limit its practical applications. To overcome this challenge, graphene-on-silicon photonic integrated circuits (PICs) have been proposed and demonstrated in recent years. In such PICs, the propagating light in silicon waveguides can strongly interact with the top-layer graphene through in-plane evanescent–field coupling. On the other hand, with unique properties in photonics and optoelectronics, graphene is expected to open a new avenue for the development of revolutionized on-chip applications, which cannot be precedent based on traditional silicon photonic technology. Therefore, this emerging area has attracted a great deal of attention. In this Chapter, we comprehensively introduce theoretical principles, fabrication processes, and applications of graphene-on-silicon PICs, and review recent research progress in this topic.
关键词： silicon photonics,optoelectronics,photonic integrated circuits,optical interconnects,biochemical sensing,Graphene,mid-infrared photonics,nonlinear optics
更新于2025-09-11 14:15:04
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Parametric Nonlinear Silicon-Based Photonicsv
摘要： Integrated silicon photonics is revolutionizing the field of optical communications as hybrid photonic/electronic integrated circuits made from this semiconductor material can seamlessly process signals spanning both the optical and electrical domains. The enormous bandwidth afforded by optical signaling enables extremely high aggregate data-rate communication signals. Correspondingly, signal processing devices must employ new mechanisms to keep up with the ever increasing need for greater capacity in communications. To this end, parametric nonlinear optical interactions in silicon-based materials provide a route toward processing and handling signal bandwidths well beyond a THz. These integrated silicon-based photonic structures also benefit from high optical confinement, large nonlinear optical responses, and long interaction lengths, making them highly suitable for power-efficient parametric nonlinear optical interactions. In particular, the parametric nonlinear optical interaction of four-wave mixing (FWM) in silicon-based photonic devices has enabled a wealth of devices for next-generation information handling applications including communications, all-optical computing, metrology, and security, which will be highlighted in this review.
关键词： nonlinear optical devices,photonic integrated circuits,silicon photonics,Four-wave mixing
更新于2025-09-10 09:29:36
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SiGe-Driven Hybrid-Integrated Silicon Photonic Link Using Optical-Domain Equalization
摘要： We report 50 and 60-Gb/s hybrid-integrated optical links in the O-band with CMOS photonic components driven by feed-forward silicon-germanium equalization. The link includes a segmented-electrode Mach Zehnder modulator and a Ge photodetector that provide high bandwidths and the potential for tight integration with control and monitoring electronics. The combination of these features enable the demonstration of a 60-Gb/s AC-coupled link and a 50-Gb/s DC-coupled link with BERs below 10-12 without the use of forward-error correction codes. This result provides a promising path toward extending speeds in latency sensitive optical links.
关键词： high-speed transmission,photonic integrated circuits,optical interconnects,Feed-forward equalization
更新于2025-09-10 09:29:36
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Low-power-consumption optical interconnect on silicon by transfer-printing for used in opto-isolators
摘要： On-chip optical interconnects heterogeneously integrated on silicon wafers by transfer-print technology are presented for the first time. Thin (<5 μm), micron sized light-emitting diodes (LEDs) and photo diodes (PDs) are prefabricated and transfer-printed to silicon wafer with polymer waveguides built between them. Data transmission with total power consumption as low as 1 mW, signal to noise ratio of >250 and current transfer ratio of 0.1% in a compact volume of <0.0004 mm3 are demonstrated. Experiment shows that the polymer waveguide between the LED and PD plays a key role in enhancing the data transmission efficiency. Reciprocal performance for bidirectional transmission is also achieved. The results show the potential for cost-effective and low profile form-factor on-chip opto-isolators.
关键词： Photonic integrated circuits,Heterogeneous integration,Optical interconnects
更新于2025-09-10 09:29:36
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Reconfigurable On-Chip Mode Exchange for Mode-Division Multiplexing Optical Networks
摘要： Data exchange plays a key role in enhancing network resources utilization and optimizing network performance. In this paper, a data exchange device based on mode-division multiplexing (MDM) technology is proposed and demonstrated, which is capable of exchanging data information between a fundamental mode (TE0) signal and an arbitrary high-order mode (TEx) signal. We experimentally demonstrate the exchange between a TE0 mode signal and a TE1 mode signal using single microring resonator. The insertion loss is about 7.5 dB including terminal coupling loss, the extinction ratio is more than 20 dB within the C band. The crosstalk for the TE1-to-TE0 and TE0-to-TE1 mode conversions is measured to be less than -22 dB and -16 dB, respectively. Clear and open eye diagrams of two different wavelength signals at 10 Gb/s are obtained. The proposed scheme is expected to be used for on-chip MDM networks in future due to its scalability, compact size and low power consumption.
关键词： photonic integrated circuits,microring resonator (MRR),Silicon photonics,mode-division multiplexing,integrated optics
更新于2025-09-09 09:28:46
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Automatic Monitor-Based Tuning of an RF Silicon Photonic 1X4 Asymmetric Binary Tree True-Time-Delay Beamforming Network
摘要： Photonic beamforming networks are promising candidates to achieve power-efficient transmission in future cellular communication systems. However, sensitivity to process and temperature variations necessitates an automatic calibration solution to enable robust operation. This paper demonstrates fully automatic monitor-based tuning of an integrated optical ring resonator-based 1X4 asymmetric binary tree optical beamforming network (OBFN). The proposed monitor-based tuning algorithm compensates fabrication variations and thermal crosstalk by controlling micro-heaters individually using information from electrical monitors. This algorithm is demonstrated on an OBFN that operates at 30 GHz with 2 GHz bandwidth and is fabricated in a standard silicon photonics foundry process. Successful calibration of the OBFN from a severely degraded initial response to the well-defined group delay responses required for a targeted radiating angle over 60? (?30? to 30?) in a linear beamforming antenna array is achieved. This fully automatic tuning approach opens the possibility of employing silicon OBFNs in real wideband mm-wave wireless communication systems.
关键词： optical ring resonators,thermal crosstalk,photonic integrated circuits,phased arrays,RF photonics,optical beamforming,true time delays,Microwave photonics
更新于2025-09-09 09:28:46
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[Institution of Engineering and Technology 12th European Conference on Antennas and Propagation (EuCAP 2018) - London, UK (9-13 April 2018)] 12th European Conference on Antennas and Propagation (EuCAP 2018) - Engineering Modes of PT Symmetric Photonic Crystals
摘要： This work explores the effects of parity-time (PT) symmetry on the modes of photonic crystal defect waveguides. Two designs are considered. In the ?rst, the defect modes are protected from PT transitions, but edge modes in the complex conjugate frequency regime appear. In the second design, the defect modes exhibit thresholdless PT transitions.
关键词： photonic crystals,optical waveguides,parity-time symmetry,photonic integrated circuits,semiconductor waveguides
更新于2025-09-04 15:30:14
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Comparison of Optical Single Sideband Techniques for THz-over-fiber Systems
摘要： The use of single sideband (SSB) signals and envelope detection is a promising approach to enable the use of economic free-running lasers in photonic THz communications. To combat the signal-signal beat interference (SSBI) associated with envelope detection, broad guard bands (GBs) may be used given the large unregulated spectrum available at THz frequencies (100 GHz – 10 THz). In this scenario, the conventional way of generating SSB signals through a digital SSB filter (here referred to as the CSSB scheme) would require quite high analog digital-to-analog converter (DAC) bandwidths. Digital virtual SSB (DVSSB) and analog virtual SSB (AVSSB) have been proposed in direct-detection optical systems for relaxing the DAC bandwidth requirements. In this paper, we compare the three techniques through simulations and implement them, for the first time, in a THz-over-fiber (ToF) system operating at 250 GHz. For the transmission experiments we employ 5 GBd 16-QAM signals with three different GBs (5.5 GHz, 4.75 GHz and 3.5 GHz). The simulations show that the best performance is obtained with the AVSSB technique, while the worst is obtained with the DVSSB scheme, where the quality of the generated sideband degrades with carrier-to-sideband power ratio. In the experimental transmissions, where receiver noise was the main source of noise, similar behavior was found between the three techniques. At the 3.5 GHz GB, however, the DVSSB exhibited a penalty of 1 dB with respect to the other two. This is likely to be due to nonlinear distortions caused by the increase in the virtual tone power.
关键词： microwave photonics,Broadband communication,semiconductor lasers,photonic integrated circuits,digital signal processing,envelope detectors,optical mixing,millimeter wave communication
更新于2025-09-04 15:30:14