The arbitrary ratio power splitter is widely used in photonic integrated circuits (PICs), for signal monitoring, equalization, feedback, and so on. Here we designed a fabrication-tolerant, compact, broadband, low-loss splitter. proposed was realized with an adiabatically tapered silicon rib waveguide 70 nm shallow etches <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"> <mml:mrow class="MJX-TeXAtom-ORD"> <mml:mi mathvariant="normal">S</mml:mi> </mml:mrow> <mml:msub>...

We demonstrate a 3-dB power splitter optimized by an enhanced particle swarm optimization algorithm based on curved directional coupler, with set of silicon columns introduced into the coupling region. The proposed device exhibits compact size, low loss and wavelength dependence in O-band. employ to engineer dispersion designing radius automatically. demonstrated enabled silicon-on-insulator can achieve multiple performance metrics simultaneously according our simulation results, footprint...

A 32×32 100 GHz silicon photonic integrated arrayed waveguide grating router (AWGR) is experimentally demonstrated for dense wavelength division multiplexing (DWDM) applications. The dimension of the AWGR 2.57 mm×1.09 mm with a core size 1.31 mm×0.64 mm. It exhibits 6.07 dB maximum channel loss non-uniformity −1.66 best-case insertion and average crosstalk −15.74 dB. In addition, in case 25 Gb/s signals, device successfully realizes high-speed data routing. AWG provides clear optical eye...

3D doping structure has significant advantages in modulation efficiency and loss compared with 2D modulator profiles. However, to the best of our knowledge, previous work on simulation methods for interdigitated designs applied simplified models, which prohibited complex doping. In this work, innovative omni junctions, based effective Monte-Carlo method, are believed be first proposed high-performance modulators. Simulation results show that reaches 0.88 V·cm, while is only 16 dB/cm,...

A concatenated LSTM (Long Short-Term Memory) architecture for CHP (combined heat and power) load forecasting was presented. Firstly, input data normalized separated into historical climate data. Then feed the two neural networks. Finally, models were as inputs to another model followed by dense layers. Relu function is used activation layers ADAM (Adaptive moment) method gradient based optimizer. The trained tested on from Nov.2016 Feb.2017 of Rizhao, Shandong. Experimental results show an...

Wepropose and experimentally demonstrate the ultra-compact mode (de)multiplexers polarization beam splitter (PBS) based on tapered bent asymmetric directional couplers. The strong coupling strength introduced by waveguides significantly shortens length. As a result, high conversion efficiencies over broad bandwidth can be obtained with small footprint. length of fabricated PBS are less than 4.9 μm 8.7 μm, respectively. From 1534-1600 nm, measured insertion loss (IL) is 1.4 1.55 dB for TE...

We propose a compact, ultrabroadband and temperature-insensitive adiabatic directional coupler based on rib silicon waveguide-enabling arbitrary splitting ratios. Simulation results show that the device can achieve ratios from 1400 to 1600 nm, equal 50%:50%, 60%:40%, 70%:30%, 80%:20%, 90%:10% for fundamental transverse electric mode. The designed has an excess loss of less than 0.19 dB operational waveband. Furthermore, proposed shows great robustness fabrication imperfection, with waveguide...

In silicon modulator design, implantation is always a key factor, significantly influencing the doping profile and carrier distribution. As waveguide limited by compact footprint of rib, three-dimensional complex optimization viable option to improve performance. This work proposes an X-intersected based on two inversely slanted junctions using effective 3D Monte Carlo method for junction generation. The optimized results show that modulation efficiency design 1.09 V·cm, while loss 18 dB/cm,...

A silicon-on-insulator polarization diversity scheme is proposed. Based on an asymmetrical evanescent coupler, a broadband and compact splitter-rotator comprising mode conversion tapers sorting asymmetric Y junctions optimized with silicon dioxide upper cladding nitride waveguide. The simulation results show loss less than 0.2 dB, the extinction ratio lower -17dB in wavelength range of 1.48µm to 1.67µm.

We experimentally demonstrate a low-loss and lowcrosstalk 16-channel 200 GHz-channel-spacing arrayed waveguide grating router (AWGR) with size of 0.67 × 0.37 mm 2 , targeting for C-band wavelength division multiplexing (WDM) interconnect routing applications.As result, the AWGR features channel spacing 200±10 GHz, free spectral range 25.62 nm 3 dB bandwidth 0.9 nm.Based on comprehensive optimal design, measured characterization revealed 5.55 maximum loss non-uniformity 1.13 best-case...

Optimizing doping profiles has always been a key approach to enhance the performance of silicon modulators. Nevertheless, pursuit innovative encountered barriers in recent times. To tackle this issue, idea inverse design, widely adopted passive photonic devices, can be employed active devices. As result, we incorporate design method with particle swarm optimization (PSO) algorithm and achieve G-shaped profile for modulator, exhibiting superior <inline-formula...

Terahertz metamaterial absorbers can effectively modulate terahertz waves by design due to the ability shape, structure and size of cells. Therefore, they have great potential in nondestructive testing are widely used insulation equipment detection, aerospace, biomedical fields. To address current problems single absorption band non-tunable, a new three-band tunable absorber/reflector is designed this paper. The device consists elliptical vanadium dioxide metal base plane separated silica...

Compared to the 2D doping design of modulator, 3D has significant advantages in modulation efficiency and loss. However, as far we know, complex three dimensions hardly been studied. This work proposes a modulator based on two inversely oblique junctions using Monte-Carlo simulation. The results show that is 1.09 V•cm, while loss 14.3 dB/cm bandwidth reaches over 35 GHz. demonstrates benefits direction light propagation utilized transport carriers, provides solution for high-speed datacom.

As one of the vital forces social governance, volunteer teams play a significant role in COVID-19 Pandemic prevention and control.On premise literature review field research, study investigated current situation service organization for pandemic Dinghai District, Zhoushan City post-pandemic era.We dives into realistic problems such as homogeneous model, professional efficacy volunteers, inadequate participation volunteers.The article analyzes proposes some optimization paths, exploring its...

An ultra-compact star-coupler based 1×10 power splitter is proposed in this paper. By introducing nano-pixel structures with direct binary search algorithm, an excess loss and channel-power non-uniformity less than -0.21 dB 0.22 are obtained, improvement of 0.3 5.4 dB.

As a widely studied fundamental block in photonic integrated circuits, multimode interferometer (MMI) is excellent coupling of multiple light sources with equal intensity. However, unacceptable excess loss occurs if phase-matching not satisfied at any input port. In this paper, we proceed direct binary search (DBS) algorithm to optimize an inverse designed 3 × 1 MMI coupler nano-pixel structure and realize high-efficiency (intensity phase) 1550 nm TE mode, compact footprint 2.5...

Doping profiles are always a key factor in the design of silicon modulators. As doping waveguide cross-section is limited by compact footprint, three-dimensional complex optimization presents itself as viable option for improved performance. This work proposes two different types unequal-proportioned omni-junction modulators obtained linear-decline weight particle swarm algorithm with appropriate figure merits (FOM). With FOM targeting at overall performance, modulator composed vertical and...

Doping profiles in the rib waveguide have been significant silicon modulator design. As doping regulation cross-section reaches limitation, complex optimization three dimensions has great potential to improve performance remarkably. This work proposes a based on L-shaped and vertical junctions for high-speed communication. The results show that at -1V bias, modulation efficiency of design is 0.81 V$\cdot$ cm, while loss 14.3 dB/cm, bandwidth over 45 GHz. applicable high-baud optical links...

In order to achieve effective modulation, researchers have studied various doping profiles within silicon modulators, but optimization has so far mainly been carried out in the cross-section or solely propagation direction. Generating 3D profile can add more optimizing dimensions modulator design. This work proposes a based on U-shaped and L-shaped junctions by Monte-Carlo method. The simulation results show that modulation efficiency is 0.67 V·cm, loss 25.7 dB/cm, with bandwidth than 36.3...

Silicon modulators play an important role in silicon photonics for efficient modulation and transmission of optical signals. Enhancing the performance has largely relied on optimizing doping profiles. However, recent years, progress finding superior solutions to optimize faced obstacles. To address this challenge, concept inverse design, which gained popularity passive photonic devices, can be applied active devices by dividing region into segments adjusting each segment based feedback from...

Doping profiles have significantly affected the trade-off of modulator performance. The optimization doping has been limited by compact rib waveguide, which leads to thoughts introducing another dimension, namely optical propagation direction, thus realizing 3D optimization. A silicon microring composed V-shaped and L-shaped junctions is demonstrated with <tex xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">$\mathrm{V}_{\pi}\mathrm{L}$</tex> 0.78...