China
Africa
Explore chapters and articles related to this topic
Review of Essential Basics
Published in Bethe A. Scalettar, James R. Abney, Cyan Cowap, Introductory Biomedical Imaging, 2022
Bethe A. Scalettar, James R. Abney, Cyan Cowap
[Refractive Index – Sellmeier Equation] The wavelength dependence of the refractive index can be described empirically by the Sellmeier equation: n2λ=1+B1λ2λ2-C1+B2λ2λ2-C2+B3λ2λ2-C3
Optical Materials
Published in Christoph Gerhard, Optics Manufacturing, 2018
Another parametric description of the dispersion characteristics of optical media is the Sellmeier equation, which is also referred to as Sellmeier dispersion formula. It is named after the German physicist Wolfgang von Sellmeier (1871). Similar to the Cauchy equation, it is based on material-specific coefficients, the Sellmeier coefficients B1, B2, B3, C1, C2, and C3. For known Sellmeier coefficients, the index of refraction can be determined for any wavelength according to
Effective d coefficient for Three-Wave mixing Processes
Published in Shekhar Guha, Leonel P. Gonzalez, Laser Beam Propagation in Nonlinear Optical Media, 2017
Shekhar Guha, Leonel P. Gonzalez
Since the principal dielectric permittivities are wavelength dependent, so are the principal dielectric indices nX, nY and nZ, to reflect which the indices are written as nX(λ), nY(λ) and nZ(λ). Empirical relationships between the refractive indices and wavelength are usually known as Sellmeier equations and
Highly birefringent large negative dispersion-flattened photonic crystal fibre for broadband residual dispersion compensation
Published in Journal of Modern Optics, 2018
Mohammad Faisal, Animesh Bala, Kanan Roy Chowdhury, Md. Borhan Mia
A full vector mode solver COMSOL Multiphysics 5.0 based on finite element method (FEM) is used for simulation. Perfectly matched layer (PML) boundary condition is applied to reduce the simulation window. Sellmeier equation is used to introduce material dispersion in consideration. For PML boundary condition, Maxwell’s equation is expressed as (20,21):