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Right: Stopband at a 700-nm wavelength.
Modeling a Photonic Crystal Fiber
A step-index fiber guides light through the high refractive index of the core, while a photonic crystal fiber (PCF) is made up of microstructured optical fibers that guide light either through index guiding or band gap confinement.
COMSOL Blog -
www.comsol.com/blogs/engineering-the-flow-of-light-using-photonic-crystals
This model represents index guided photonic crystal fiber as discussed in the J. Joannopoulus, R.D. Meade, and J.N. Winn, Photonic Crystals (Modeling the Flow of Light), Princeton University Press, 2008.
This model file relate to the blog post: https://www.comsol.com/blogs/engineering-the-flow-of-light-using-photonic-crystals
Application Gallery -
www.comsol.com/model/75371
The optical fiber communication has been popular topics besides robot study nowadays. In the process of the Dense Wave-Length Division Multiplexing (DWDM) study, the dispersion compensate for the traditional optical fiber is difficult to solve for long distance transport information. The structural parameters are adjusted for the traditional hexagonal photonic crystal fiber and the negative dispersion coefficient is obtained as larger as possible.
Technical Papers and Presentations -
www.comsol.com/paper/43493
Photonic crystal fiber (PCF) is also known as micro structured or holey fiber that uses Photonic crystal, which is formed using a periodic array of microscopic air holes that run along the entire fiber length. Light propagation in PCFs is far superior to standard fiber, which uses constant lower refractive index cladding.
Technical Papers and Presentations -
www.comsol.com/paper/83601
It is a complex problem to calculate the photonic crystal fiber model, and the methods of plane wave expansion, Hermite-Guasssian function and beam propagation have been analyzed.
Technical Papers and Presentations -
www.comsol.com/paper/20011
This paper evaluates some of commercially available solid core photonic crystal fibers. The dispersion coefficients and sensitivity of these fibers are estimated using COMSOL Multiphysics®, and compared with the theoretical values wherever available. SCPCFs cross-section presents a periodic array of air holes surrounding a solid core, which extends invariably along the fiber length. When using a single material in the fiber manufacturing, this cross-sectional configuration leads to a lowering of the cladding’s effective refractive index given that the solid core is made of the same material.
Technical Papers and Presentations -
www.comsol.com/paper/19371
We present the utilization RF module of COMSOL Multiphysics® for understanding three different types of wave guidance mechanisms in photonic crystal fibers (PCFs), like modified total internal reflection, Bragg’s reflection and resonant trapping of defect mode at Dirac frequency. Effective refractive indices of the core and cladding are calculated using mode analysis study to verify total internal reflection in a solid core PCF. The photonic band structure (PBS) of the cladding is calculated using eigen frequency study to identify photonic band gap (PBG) region and Dirac point.
Technical Papers and Presentations -
www.comsol.com/paper/27181
There has been a growing interest in optical parametric amplifiers (OPA) for light generation and amplification in because of the possibility for arbitrary operation wavelength and wideband tenability [1]. PCFs are of particular interest in such nonlinear optics applications because of the enhanced light confinement and the resultant high nonlinearity (γ) achievable with air-cladded designs. Additionally, the geometric parameters of PCFs provide multiple degrees of freedom for dispersion engineering.
Technical Papers and Presentations -
www.comsol.com/paper/28631
We modify a Tunnel Effect Microscope (STM) with the purpose of analyzing the local production of photons in the electrostatic junction during the image taking process. The novelty of this project compared to previous studies is that it is intended to be developed from the beginning as part of a global research that covers other techniques of Scanning Probe Microscopy (SPM), incorporating all the elements in the same experimental configuration. The starting point is the appropriate simulation and optimization of the creation and detection of light using the Ray Optics Module of COMSOL Multiphysics®, adapting ideas from the models luneburglensgo and light_pipe in the Application Libraries.
Technical Papers and Presentations -
www.comsol.com/paper/67311
This paper presents techniques for modeling annealed proton exchange (APE) and reverse proton exchange (RPE) waveguides in periodically poled lithium niobate for application to optical frequency conversion. A combination of time-dependent diffusion modeling and electromagnetic mode analysis using the RF module are used to predict the relationship between the poling period and the second harmonic generation (SHG) spectrum. Experimental SHG data are used to adjust the model, and calculated periodic poling periods are compared with measured results.
Technical Papers and Presentations -
www.comsol.com/paper/18699
The environments in which sensors are most integral are often the most harsh and unforgiving, such as vacuum chambers, the ocean floor, and petroleum reservoirs. Traditional sensing techniques are not ideal in these applications, whereas optical fiber sensors can provide a versatile pressure sensing solution, as they are sensitive and electromagnetically immune. Researchers at Universidade Estadual de Campinas (Unicamp) and the Instituto de Estudos Avançados (IEAv) in Brazil are developing optical fibers with a microstructure that exhibits high sensing capabilities.
User Story Gallery -
www.comsol.com/story/58151
COMSOL Multiphysics® software was used to simulate and analyze the transmission attenuation spectra of the negative curvature hollow-core fiber (NCHCF) over the wavelength from 2.7 μm to 4.2 μm. The effect of thickness of capillaries and the effect of the distance between the capillaries on confinement loss spectra were studied, which agreed well with the high-loss and low-loss bands predicted by the ARROW model. Based on mode confinement factor, a criterion for selecting the fundamental mode was proposed.
Technical Papers and Presentations -
www.comsol.com/paper/19929
Design and optimization of the nanophotonic devices are critical in realizing advanced photonic integrations in the future. COMSOL can be used for simulating various types of nanophotonic devices involving different materials and dimensions. This report talks about some recent work of Prof. Zheng’s team, including the simulation of dielectric photonic waveguides, optic fibers and surface plasmon polariton (SPP) waveguides and devices.
Technical Papers and Presentations -
www.comsol.com/paper/9804
We present a study of an optofluidic biosensor. The sensor operates in a transmission mode wherein detection is based on a shift in the transmission spectrum caused by the contrast in refractive index between the carrier fluid and the target biomaterial. We study the behavior of the sensor using 2D full-wave electromagnetic analysis, and perform parametric studies of sensitivity as a function of key device parameters. Device optimization can be accomplished using the COMSOL RF Module, and parametric designs can be completed within a few minutes on a modern workstation.
Technical Papers and Presentations -
www.comsol.com/paper/6396
Microstructured optical fiber (MOF) has carved out a niche in the field of photonics in the last decade. On the other hand, the field of plasmonics is also rapidly emerging as a fascinating research area. Combining the advantages of both these fields therefore seems imperative for newer applications in interdisciplinary areas, thereby leading to the development of metal-incorporated MOFs.
Technical Papers and Presentations -
www.comsol.com/paper/61041
Anisotropic materials, such as the crystal from the stone and bench experiment described above, are found in applications ranging from detecting harmful gases to beam splitting for photonic integrated circuits.
There are basically two kinds of anisotropic crystal: uniaxial and biaxial crystal.
COMSOL Blog -
www.comsol.com/blogs/how-to-model-optical-anisotropic-media-with-comsol ...
Wave Optics Module Analyze Micro- and Nano-Optical Devices The Wave Optics Module, an add-on to the COMSOL Multiphysics® software platform, is used by engineers and scientists to understand, predict, and study electromagnetic wave propagation and resonance effects in optical applications. By analyzing electromagnetic field distributions, transmission and reflections coefficients, and power dissipation in a proposed design, simulation of this kind leads to more powerful and efficient products and engineering methods. In order to optimize designs for photonic devices, integrated optics, optical waveguides, couplers, fiber optics, and more, you need to account for real-world scenarios.
Products -
www.comsol.com/wave-optics-module
The use of grating couplers to couple conventionally phased and polarized light near vertically in and out of optical slab or film waveguides [1] represents an attractive method to interface optical fiber to photonic ICs. Previously developed grating coupler designs use transversely uniform grating structures matched to conventional scalar fiber modes. The performance of these geometries can be predicted and optimized with good accuracy using specialized 2D electromagnetic modeling tools [2].
Technical Papers and Presentations -
www.comsol.com/paper/25072
In 1870, an audience watched as a stage was set with two buckets, one on top of the other. Due to a small hole in the upper bucket, water poured into the lower bucket, bending as it did so. To the audience's amazement, sunlight followed the bend of water — a phenomenon later termed total internal reflection.
COMSOL Blog -
www.comsol.com/blogs/silicon-photonics-designing-and-prototyping-silicon ...
Ever since its advent optical fibers have revolutionized the communication technology but apart from communication they are being used in a variety of other areas such as medical technology, sensing, laser sources in the form of fiber lasers, amplifiers, cutting and drilling, defense applications etc. Optical fibers are manufactured by drawing techniques which have largely limited the materials that can be incorporated in them. High pressure chemical vapor deposition (HPCVD) has emerged as an important technique to deposit various materials inside pre-drawn hollow optical fibers.
Technical Papers and Presentations -
www.comsol.com/paper/26342