2x2 Optical Switch Based on Silicon-on-Insulator Microring Resonator

2011 ◽  
Vol 378-379 ◽  
pp. 531-534
Author(s):  
B. Mardiana ◽  
Hanim Abdul Razak ◽  
H. Hazura ◽  
S. Shaari ◽  
P. Susthitha Menon ◽  
...  
Keyword(s):  
Optical Switch ◽  
Free Spectral Range ◽  
Fdtd Method ◽  
Single Mode ◽  
Microring Resonator ◽  
Silicon On Insulator ◽  
Electric Signal ◽  
Compact Size ◽  
Near Future ◽  
Difference Time

In near future, silicon-on-insulator (SOI) microring resonator are expected to be basic components for wavelength filtering and switching due to their compact size and wide free spectral range (FSR). In this paper, a 2X2 optical switch by using active microring resonator is proposed. The switch is consists of second order serially cascaded microring coupled to a pair of waveguide. The ON/OFF state of the design is control by electric signal which will vary the refractive index. The device is design to operate at 1.55µm wavelength. With a 500nm x 200nm rib dimensions, the design is proven to have single mode behaviour. Finite-Difference Time-Domain (FDTD) method simulation by RSOFT software is use to characterize the device performance. The results show that the 2X2 optical switch proposed can be an efficient device to be functioning in WDM application.

DESIGN AND CHARACTERIZATION OF MULTIPLE COUPLED MICRORING BASED WAVELENGTH DEMULTIPLEXER IN SILICON–ON–INSULATOR (SOI)

2012 ◽  
Vol 21 (01) ◽  
pp. 1250004 ◽  
Author(s):  
HAZURA HAROON ◽  
SAHBUDIN SHAARI ◽  
P. S. MENON ◽  
B. MARDIANA ◽  
A. R. HANIM ◽  
...  
Keyword(s):  
Free Spectral Range ◽  
Single Mode ◽  
Silicon On Insulator ◽  
Optimized Design ◽  
Third Order ◽  
Wavelength Division ◽  
Wavelength Demultiplexer ◽  
Planar Lightwave ◽  
Difference Time

We report in this paper, an optimized design and characterization of SOI based single mode, four channels wavelength demultiplexer using microrings. The usage of silicon-on-insulator (SOI) allows a wide free spectral range (FSR) for the device that is crucial in developing ultra-compact integrations of planar lightwave circuits (PLCs). The characterizations are done using Finite-Difference Time-Domain (FDTD) mode simulations from RSOFT. Serially cascaded microring arrays up to the third order are presented to study the design trade-off among the FSR, Q-factor and optical losses of the laterally coupled wavelength demultiplexer. The demultiplexer is expected to be working at C-band region of Wavelength Division Multilplexing (WDM) for a wavelength around 1550 nm. Our proposed demultiplexer has low insertion loss (< 0.5 dB) and a crosstalk around 12 ~ 19 dB.

A Multi-Slot-Waveguide-Based Ring Resonator Sensor on Silicon-on-Insulator Platform: Design and Simulation

2013 ◽  
Vol 710 ◽  
pp. 404-407
Author(s):  
Liang Gao ◽  
Guo Hui Yuan ◽  
Xing Li Liu ◽  
Yu Ren Chen
Keyword(s):  
Ring Resonator ◽  
Free Spectral Range ◽  
Fdtd Method ◽  
Silicon On Insulator ◽  
Asymmetric Structure ◽  
Slot Waveguide ◽  
A Value ◽  
Organic Solutions ◽  
Difference Time ◽  
Sensing Characteristics

We design a double slots based on micro-ring resonator on silicon-on-insulator (SOI). An asymmetric structure is considered for the ring waveguide in order to improve the sensor's bending efficiency. Finite-difference time-domain (FDTD) method is used to analyze and optimize this sensor. The optimized size of the sensor is below 25×15μm2. Numerical analysis shows that when the radius of the micro-ring is about 5μm, the sensitivity reaches a value of 708nm/RIU, which is ten times of that of the conventional micro-ring sensor. Quality factor (Qfactor) of 580 and free spectral range (FSR) of 33nm are also obtained. Our analysis also shows that the sensor has good sensing characteristics to different organic solutions.

scholarly journals Fully three-dimensional analysis of a photonic crystal assisted silicon on insulator waveguide bend

2018 ◽  
Vol 32 (31) ◽  
pp. 1850344 ◽  
Author(s):  
N. Eti ◽  
Z. Çetin ◽  
H. S. Sözüer
Keyword(s):  
Photonic Crystal ◽  
Numerical Study ◽  
Fdtd Method ◽  
Three Dimensional ◽  
Silicon On Insulator ◽  
Geometrical Parameters ◽  
Low Loss ◽  
Bending Loss ◽  
Difference Time ◽  
Waveguide Bend

A detailed numerical study of low-loss silicon on insulator (SOI) waveguide bend is presented using the fully three-dimensional (3D) finite-difference time-domain (FDTD) method. The geometrical parameters are optimized to minimize the bending loss over a range of frequencies. Transmission results for the conventional single bend and photonic crystal assisted SOI waveguide bend are compared. Calculations are performed for the transmission values of TE-like modes where the electric field is strongly transverse to the direction of propagation. The best obtained transmission is over 95% for TE-like modes.

scholarly journals Enhanced Sensitivity of Microring Resonator-Based Sensors Using the Finite Difference Time Domain Method to Detect Glucose Levels for Diabetes Monitoring

2020 ◽  
Vol 10 (12) ◽  
pp. 4191
Author(s):  
Lilik Hasanah ◽  
Harbi Setyo Nugroho ◽  
Chandra Wulandari ◽  
Budi Mulyanti ◽  
Dilla Duryha Berhanuddin ◽  
...  
Keyword(s):  
Finite Difference ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Microring Resonator ◽  
Silicon On Insulator ◽  
Laser Source ◽  
Quality Factors ◽  
Simulation Design ◽  
Glucose Levels ◽  
Difference Time

The properties of light and its interaction with biological analytes have made it possible to design sophisticated and reliable optical-based biomedical sensors. In this paper, we report the simulation, design, and fabrication of microring resonator (MRR)-based sensors for the detection of diabetic glucose levels. Electron Beam Lithography (EBL) with 1:1 hydrogen silsesquioxane (HSQ) negative tone resist were used to fabricate MRR on a Silicon-on-Insulator (SOI) platform. Scanning Electron Microscopy (SEM) was then used to characterize the morphology of the MRR device. The full-width at half-maximum (FWHM) and quality factors of MRR were obtained by using a tunable laser source (TLS) and optical spectrum analyzer (OSA). In this paper, the three-dimensional Finite Difference Time Domain (3D FDTD) approach has been used to simulate the proposed design. The simulation results show an accurate approximation with the experimental results. Next, the sensitivity of MRR-based sensors to detect glucose levels is obtained. The sensitivity value for glucose level detection in the range 0% to 18% is 69.44 nm/RIU. This proved that our MRR design has a great potential as a sensor to detect diabetic glucose levels.

All-Optical Switching in Ultrashort Photonic Crystal Couplers Modified Y-branch Structure

2015 ◽  
Vol 36 (3) ◽  
Author(s):  
Masoud Zahravi ◽  
Mitra Zahravi ◽  
Hamed Alipour-Banaei
Keyword(s):  
Photonic Crystal ◽  
Optical Switching ◽  
Optical Switch ◽  
Fdtd Method ◽  
Wavelength Division ◽  
All Optical ◽  
Channel Wavelength ◽  
All Optical Switch ◽  
Difference Time ◽  
All Optical Switching

AbstractIn this paper, an all-optical switch based on photonic crystal directional coupler has been simulated and analyzed by the finite difference time domain (FDTD) method. An ultra small 3-channel wavelength division demultiplexer based on 2D photonic crystal was modified into all-optical switch suitable for integration. The output wavelengths of designed structure can be tuned for communication applications (around 1.5 µm, 1.4 µm, 1.3 µm) by locating suitable defect parameters in the corner of each resonance cavity and input waveguides. The bandwidth of each channel is about 1 nm.

Investigation of Adhesion Materials for Gold Line-and-Space Surface Plasmon Antenna on SOI-MOS Photodiode

2011 ◽  
Vol 222 ◽  
pp. 201-204 ◽  
Author(s):  
Hiroaki Satoh ◽  
Yuki Matsuo ◽  
Hiroshi Inokawa ◽  
Atsushi Ono
Keyword(s):  
Finite Difference ◽  
Surface Plasmon ◽  
Time Domain ◽  
Finite Difference Time Domain ◽  
Fdtd Method ◽  
Light Sensitivity ◽  
Silicon On Insulator ◽  
Electromagnetic Simulation ◽  
Metal Insulator ◽  
Difference Time

In order to improve the light sensitivity of silicon-on-insulator metal-insulator-semiconductor (SOI-MOS) photodiode, differences caused by the adhesion materials for gold (Au) line-and-space (L/S) surface plasmon (SP) antenna in MOS structure are evaluated based on the electromagnetic simulation using finite difference time domain (FDTD) method.

scholarly journals 2x4 Hybrid MZI-MMI Configuration with MMI Phase-shifters as a High-speed Optical Switch with Low Power Consumption

2019 ◽  
Author(s):  
Boris Niraula ◽  
Conrad Rizal
Keyword(s):  
Power Consumption ◽  
High Speed ◽  
Optical Switching ◽  
Phase Shifter ◽  
Optical Switch ◽  
Cmos Technology ◽  
Phase Shifters ◽  
Silicon On Insulator ◽  
Coupling Loss ◽  
Compact Size

This paper reports 2 × 4 hybrid Mach-zehnder interferometer (MZI) - multi-mode interferometers (MMI) based compact thermo-optical switch consisting of slab waveguides on silicon-on-insulator, SOI, platform. The device consists of two identical MMIs, each of 6 μm wide and 140 μm long connected with two phase shifters MMIs each with 2 μm wide and 8 μm long and linear tappers each 4 μm long, connected at both ends of the MMIs to minimize the power coupling loss. The loss for linear taper is found to be below 0.02dB. The footprint of the whole device is six 6 μm × 324 μm. This structure is based on unique multimode region shape, which leads optical switch to have less coupling loss and reduced cross-talk. The average thermo-optical switching power consumption is 1.4 mW, the excess losses are 0.8 dB, and the imbalances are 0.1 dB. Aluminum is used as a heating pad, and a trench is created around this pad to prevent from spreading of heat and reduce power loss almost by a factor of 2 to the adjacent phase shifter. Our new heating method has advantages of compact size and ease of fabrication with the current CMOS technology.

scholarly journals Vertical Injection and Wideband Grating Coupler Based on Asymmetric Grating Trenches

2021 ◽  
Author(s):  
Md Asaduzzaman ◽  
Robert J. Chapman ◽  
Brett C. Johnson ◽  
Alberto Peruzzo
Keyword(s):  
Fdtd Method ◽  
Coupling Efficiency ◽  
Silicon On Insulator ◽  
Subwavelength Structures ◽  
Grating Coupler ◽  
Subwavelength Gratings ◽  
Vertical Injection ◽  
Index Variation ◽  
2D Fdtd ◽  
Difference Time

Abstract A Silicon-on-insulator (SOI) perfectly vertical fibre-to-chip grating coupler is proposed and designed based on engineered subwavelength structures. The high directionality of the coupler is achieved by implementing step gratings to realize asymmetric diffraction and by applying effective index variation with auxiliary ultra-subwavelength gratings. The proposed structure is numerically analysed by using two-dimensional Finite Difference Time Domain (2D FDTD) method and achieves 76% (-1.19 dB) coupling efficiency and 39 nm 1-dB bandwidth.

Compact 2X2 Optical Switch Using Silicon Photonics Technology for Optical Beam Forming Network

2014 ◽  
Vol 614 ◽  
pp. 233-236
Author(s):  
Wan Jun Wang ◽  
Heng Zhao ◽  
Wei Feng Guo ◽  
Hai Feng Shao ◽  
Ting Hu ◽  
...  
Keyword(s):  
Silicon Photonics ◽  
Phase Shifter ◽  
Optical Switch ◽  
Cmos Technology ◽  
Optical Beam ◽  
Silicon On Insulator ◽  
Beam Forming ◽  
Experimental Demonstration ◽  
Output Waveguide ◽  
Compact Size

We report the experimental demonstration of a 2×2 electro-optical switch in silicon-on-insulator. By controlling electro-optical phase shifter, light from any input waveguide can be directed to any output waveguide. Furthermore, the proposed optical switch can be expanded to be 1×N and N×N optical switch for optical beam forming network. The switch is fabricated by CMOS technology. In experiment, full 2×2 switching functionality is demonstrated at wavelength of 1.55 μm, with an average crosstalk of-14.6 dB and compact size of 300X100 um2.

scholarly journals Tunable Mid-Infrared Graphene Plasmonic Cross-Shaped Resonator for Demultiplexing Application

2020 ◽  
Vol 10 (3) ◽  
pp. 1193 ◽  
Author(s):  
Somayyeh Asgari ◽  
Tapio Fabritius
Keyword(s):  
Fdtd Method ◽  
Three Dimensional ◽  
Single Mode ◽  
Transmission Spectra ◽  
Mid Infrared ◽  
Coupled Mode ◽  
Light Waves ◽  
Dimensional Parameters ◽  
Difference Time ◽  
Sub Wavelength

In this study, a tunable graphene plasmonic filter and a two-channel demultiplexer are proposed, simulated, and analyzed in the mid-infrared (MIR) region. We discuss the optical transmission spectra of the proposed cross-shaped resonator and the two-channel demultiplexer. The transmission spectra of the proposed MIR resonator are tunable by change of its dimensional parameters and the Fermi energy of the graphene. Our proposed structures have a single mode in the wavelength range of 5–12 µm. The minimum full width at half maximum (FWHM) and the maximum transmission ratio of the proposed resonator respectively reached 220 nm and 55%. Simulations are performed by use of three-dimensional finite-difference time-domain (3D-FDTD) method. Coupled mode theory (CMT) is used to investigate the structure theoretically. The numerical and the theoretical results are in good agreement. The performance of the proposed two-channel demultiplexer is investigated based on its crosstalk. The minimum value of crosstalk reaches −48.30 dB. Our proposed structures are capable of providing sub-wavelength confinement of light waves, useful in applications in MIR region.

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