An improved phase detection scheme for Mach-Zehnder and bimodal interferometers is presented. By using a 90° hybrid, always two outputs operate at a highly sensitive point and the phase-shift-unambiguousness is extended to a range of 2π. The phase detection is independent of mode attenuations and input power fluctuations.
Optical interconnections are a promising step forward to overcome the intrinsic limitations of electrical interconnections in integrated circuits. In this work, we present a finite element method (FEM) simulation study of a dielectric waveguide etched through the full thickness of a silicon substrate. In particular, it is investigated the effect of the bridge-to-core size ratio […]
IS03–Simulation and design of plasmonic directional couplers: application to interference-based all-optical gates
The paper is focused on the design of optical components based on plasmonic multi-slot directional couplers. In particular, the design of an all-optical gate is proposed, whose operation is based on the coupling between three plasmonic slots. The device input wavelength is 1550 nm, typical of long-haul telecommunication systems. The device footprint is as small […]
In this paper three types of Silicon Photonics OPA architectures are proposed and investigated. Edge-fire optical phased array, that simplifies the design of the OPA. Second architecture is OPA with grating coupler antennas. Maximum steering angle for edge-fire OPA is ±44◦, FWHM is 0.10986◦. For GC OPA steering angle is ±20◦ and FWHM=1.003116◦. Third architecture […]
We model the third-order material susceptibility chi3 in silicon waveguides for integrated optics. Analysis of four-wave mixing in these waveguides requires an in-depth study of material nonlinearity – in contrast to modeling light propagation in fibers with the optical nonlinear Schrödinger equation. We include electronic and atomic lattice (Raman) responses of the material and present […]
In this paper, we develop a time domain model of a Semiconductor Optical Amplifiers Fiber Cavity Laser (SOAFCL). The time domain characteristics of two different cavity configurations (bidirectional and one-way cavity) are compared. The study shows that one-way cavity is less noisy compared to the bidirectional cavity which presents higher output power.
An integrated directional coupler is designed for a bidirectional communication on a single waveguide by separating both data streams within individual branches. Thereby, an adjustment of the numerical aperture of the transmitting branch is a promising optimization approach. As the couplers are manufactured by a field-assisted diffusion process the numerical aperture is directly related to […]
A product-sum photonic integrated circuit consisting of SOI-based cascaded microring modulators and a 4×1 multimode interference coupler is proposed for CNN computing. A basic product-sum operation is numerically demonstrated for 2×2 matrix.
IS09–Modeling of polarization-rotation based photonic D flip-flop using a compact micro-ring resonator
This paper demonstrates the modeling and simulation of all-optical polarization rotation based clocked D flip-flop using a single micro-ring resonator. The simulated results show the switching time of 0.5 ps and the on-off ratio of 25.27 dB.
IS10–Reconfigurability Analysis of Single and Dual Wavelength Millimeter Wave Photonic Generation Techniques
Optimizing the operating conditions of a Mach-Zhender modulator (MZM) for different design requirements has drawn considerable research interests due to its key role as an electro-optic (EO) interface in hybrid access radio-over-fiber networks. In this work, we compare the modulation efficiency and the bit error rate (BER) performances of single and dual-wavelength-modulated millimeter-wave (MMW) photonic […]
The field of designing photonic crystal based all optical devices is the recent research trend as it remarkably promises an opportunity to diminish circuit complexity. The main intention of this present work is to contrive novel photonic crystal waveguide based all optical chalcogenide T-flip flop. Finally the efficient performance is numerically demonstrated to show elevated […]
We propose a generic model that can simulate the functioning of doppler LiDAR system from given target speed, working distance and modulation pattern. Simulations confirm that our model yield system performance consistent with the theoretical calculations.
IS13pd–6‑Channel Plasmonic Demultiplexer using Metal/Insulator/Metal Based Circular Resonators with Silver Nano Rods Arrays
In this paper, we design and propose a compact 6-channel plasmonic demultiplexer (DMUX), utilizing of metal/insulator/metal (MIM) circular resonators (CRs) with metal nano‑rod arrays (NRAs). The resonance wavelengths of the output ports depend on the number of metallic NRAs in the CRs. For the numerical examination of the designed scheme, the finite‑difference time‑domain (FDTD) technique […]
IS14pd–Real-time Thickness Measurement with a Modified Sagnac Interferometer Using Phase Shift Technique
The modified Sagnac interferometer with a phase-shift approach is given here for measuring Ta2O5 thin-film thickness. The input light is split into reference and sample beams. A real-time signal measurement is performed to get the output intensities of both beams with four different polarizer settings. These intensities can then be effectively converted into film thickness.