- 标题
- 摘要
- 关键词
- 实验方案
- 产品
-
[IEEE 2019 49th European Microwave Conference (EuMC) - Paris, France (2019.10.1-2019.10.3)] 2019 49th European Microwave Conference (EuMC) - A 2 × 3 Hybrid Substrate Integrated Waveguide Coupler Applied to Beamforming Network
摘要： A 2 × 3 substrate integrated waveguide (SIW) H-plane hybrid coupler operating at 28 GHz with constant phase shifting outputs is proposed. This proposed 6-port hybrid junction coupler can equally divide the input power into the three output ports, with a constant relative phase difference +120?, 0?, ?120?. Simulation results indicate that within 5% relative bandwidth, our designs achieve a good impedance matching with high isolation, and equal power division having constant phase shifting.
关键词： hybrid coupler,six-port junction,H-plane directional coupler,substrate integrated waveguide (SIW),millimeter-wave techniques
更新于2025-09-12 10:27:22
-
AIP Conference Proceedings [AIP Publishing 15th International Conference on Concentrator Photovoltaic Systems (CPV-15) - Fes, Morocco (25–27 March 2019)] 15th International Conference on Concentrator Photovoltaic Systems (CPV-15) - Multilayer optical routing by means of vertical directional coupler with long range surface plasmons
摘要： We show that e?cient multilayer optical routing is achievable with long range surface plasmon polaritons (LR-SPP) through an accurate design of vertical directional couplers (VDC). Our theoretical results suggest that by suitably tuning some geometrical parameters, in particular the path length and bend radius, it is possible to obtain a good control on the overall interaction, even in presence of fabrication non-idealities. We present a top-down fabrication process ?ow for LR-SPP multilayer optical circuits, obtained by stacking multiple ultrathin nanometric metal ?lms within a polymeric dielectric background; the overall structure has a good degree of mechanical stability. By pro?ting from the topological advantage given by VDCs, as one of the useful applications of our work, we propose a new optical integrated circuit architecture scheme, capable of connecting two separate circuit paths without in?uencing the geometry or signi?cantly promoting crosstalk with any other path in the middle. The possibility to develop vertically stacked optical integrated circuits upon electronic integrated circuits makes LR-SPPs a good technology for the production of inexpensive and high-density network systems.
关键词： optical integrated circuits,long range surface plasmons,multilayer optical routing,vertical directional coupler
更新于2025-09-12 10:27:22
-
Femtosecond Laser Written Depressed-Cladding Waveguide 2 × 2, 1 × 2 and 3 × 3 Directional Couplers in Tm3+:YAG Crystal
摘要： Ion-doped crystal-based compact devices capable of beam splitting and coupling are enthralling for a broad range of classical and quantum integrated photonics applications. In this work, we report on the fabrication of depressed-cladding waveguide 2D 2×2, 1×2 and 3D 3×3 directional couplers in Tm3+:YAG crystal by femtosecond laser writing. The performances of the couplers are characterized at 810 nm, showing single-mode guidance, polarization independence, ?nely matched splitting ratios. These results open up new opportunities in the bene?cial fabrication of 3D circuits and devices in crystals.
关键词： crystal,femtosecond laser writing,directional coupler,depressed-cladding waveguide,integrated photonics,yttrium aluminum garnet,quantum memory
更新于2025-09-12 10:27:22
-
Insulator-Metal-Insulator-Metal-Insulator and Metal-Insulator-Metal Vertical Directional Couplers with Surface Plasmon Polariton Waveguides
摘要： We propose two vertical directional couplers (VDCs) based on surface plasmon polariton (SPP) waveguides. One is an SPP insulator-metal-insulator-metal-insulator (IMIMI) VDC. The SPP IMIMI VDC is composed of two 45-(cid:2)m-long S bends, an L (cid:2)m-long straight waveguide, a 4-(cid:2)m-long C gap, and a 500-nm-long M gap. The other is an SPP metal-insulator-metal (MIM) VDC. The SPP MIM VDC is composed of two 10-(cid:2)m-long S bends, an L (cid:2)m-long straight waveguide, a 60-nm-long C gap, and a 500-nm-long M gap. Au is used as the metal and a low-loss polymer is used as the insulator in the IMIMI and MIM waveguides. In the SPP IMIMI VDCs, the excited 5.0 (cid:2)m × 4.5 (cid:2)m input S-s0 mode propagates along the S bend_1, propagates and couples along the straight waveguide L, and propagates again along the S bend_2. The losses due to the L region of the SPP IMIMI VDC are 1.33 dB when L = 13 (cid:2)m and 2.26 dB when L = 23 (cid:2)m and the coupling length is ～10 (cid:2)m In the SPP MIM VDCs, the excited 1.7 (cid:2)m × 0.5 (cid:2)m input G-s0 mode propagates along the S bend_1, propagates and couples along the straight waveguide L, and propagates again along the S bend_2. The losses of L of the SPP MIM VDC are 1.50 dB when L = 5 (cid:2)m and 11.20 dB when L = 65 (cid:2)m and the coupling length is ～65 (cid:2)m. The SPP IMIMI and MIM VDCs can be a potential step in the process of integration from micro-scale to nano-scale.
关键词： Plasmonic Device,Directional Coupler,Plasmonic Based Integrated Circuit,Surface Plasmon Polariton
更新于2025-09-12 10:27:22
-
Contra-Directional Ridge Waveguide Couplers: Design and Applications
摘要： This article presents novel wideband contra-directional couplers based on single conductor ridge waveguide, and their applications. The couplers exhibit wide bandwidths and tight coupling while occupying very small volume due to the compactness of ridge waveguides. The methodology to design the couplers is presented. It is inspired by the even and odd modes used to design TEM coupled lines couplers but implemented with TE modes in this novel approach. The design starts with designing the coupling section in a quadruple-ridge waveguide that supports two independent even and odd TE modes. Proper choice of the cross section allows the designer to achieve the required impedance levels for the required coupling values. An S-band proof of concept prototype of a single coupler was synthesized, fabricated, and tested, demonstrating excellent measured results without any tuning. The couplers can be exploited in versatile applications, such as power sampling, beamforming, or high-power combiners. As an additional proof of concept design, a C-band three-way combiner was also designed and tested, showing the potential of the novel coupler for different applications.
关键词： ridge waveguide,power combiner,divider,Backward coupling,directional coupler
更新于2025-09-11 14:15:04
-
Applications of Silicon Photonics in Sensors and Waveguides || New Approach to Mach-Zehnder Interferometer (MZI) Cell Based on Silicon Waveguides for Nanophotonic Circuits
摘要： In this chapter, we present a new scheme for Mach-Zehnder Interferometer (MZI) structure based on only one 4×4 multimode interference (MMI) coupler. We design the new MZI cell on the silicon on insulator (SOI) platform. The MZI based on directional coupler and 2×2 MMI coupler is also investigated in detail. The new MZI cell is a basic building block for photonic applications such as optical quantum gate, optical computing and reconfigurable processors. The numerical simulations show that our approach has advantages of compact size, ease of fabrication with the current complementary metal oxide semiconductor (CMOS) circuitry.
关键词： multimode interference,finite difference time difference,directional coupler,modified effective index method,multimode waveguide,finite difference method,silicon on insulator
更新于2025-09-11 14:15:04
-
[IEEE 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Paris, France (2018.7.8-2018.7.13)] 2018 Conference on Precision Electromagnetic Measurements (CPEM 2018) - Medium Power Application of a Four-Port Reflectometer
摘要： This paper describes an application of a four-port reflectometer system to measure the reflection coefficient of a terminal load from 1 GHz to 2.5 GHz at about 150 W power level. The scattering parameters of the four-port reflectometer measured at low power have been experimentally proved to be applicable at medium power. The measurement results of the four-port reflectometer are presented and analyzed. This measurement method can be used at higher power level.
关键词： Medium Power,Four-Port Reflectometer,reflection coefficient,Directional Coupler
更新于2025-09-10 09:29:36
-
[IEEE 2018 IEEE 3rd Optoelectronics Global Conference (OGC) - Shenzhen, China (2018.9.4-2018.9.7)] 2018 IEEE 3rd Optoelectronics Global Conference (OGC) - Non-volatile Optical Switch Based on a GST-Loaded Directional Coupler
摘要： We present a non-volatile optical switch based on a directional coupler comprising a silicon-Ge2Sb2Te5 (GST) hybrid waveguide. The non-volatility of GST makes it attractive for reducing static power consumption in optical switching. Experimental results show that the optical switch has an extinction ratio of >20 dB in the bar state and >25 dB in the cross state around 1578 nm wavelength. The insertion loss is 2 dB and 7 dB for the bar and cross states, respectively.
关键词： directional coupler,silicon photonics,phase change material
更新于2025-09-10 09:29:36
-
Cavity model-based analysis of field propagation in a six-port Riblet-type directional coupler
摘要： A cavity model-based analysis of electric field propagation inside a six-port Riblet-type directional coupler has been presented in this paper. Though cavity modeling technique is not very new and was previously applied to different rectangular waveguide-based passive networks to find their network parameters, for the first time it has been used here to analyze the field propagation inside a six-port Riblet-type directional coupler. From the analysis, the frequency response of the network has been estimated. Since the main objective of this work is to analyze the field propagation inside a passive network, not to present another network, a six-port Riblet-type directional coupler that is already proposed in literature has been considered. The numerical analysis has been verified by comparing the scattering parameters data obtained from the cavity model analysis with CST Microwave Studio simulation data and measured data available in the literature.
关键词： Riblet-type directional coupler,cavity modeling technique,Aperture field distribution,method of moment,scattering parameters
更新于2025-09-09 09:28:46
-
Vertically symmetric broadband lumped element CMOS directional coupler
摘要： A vertically symmetric lumped element directional coupler (VSLEDC) providing broadband characteristics is proposed. In simulations, the proposed VSLEDC showed a 43.8% broader bandwidth than a horizontally and vertically symmetric lumped element directional coupler under similar design conditions for the same insertion loss. The proposed coupler was implemented in a Global Foundry 130 nm CMOS technology. The overall chip size was 1300 μm × 850 μm. The coupling was designed to be ?10 dB at 1 GHz. The S-parameter measurements showed an absolute bandwidth and a fractional bandwidth of 141.1 MHz and 14.11%, respectively. Within the bandwidth, the insertion loss was 1.6?1.8 dB.
关键词： lumped element,directional coupler,Vertically symmetric,broadband,CMOS
更新于2025-09-04 15:30:14