Questions tagged [waveguide]
The waveguide tag has no usage guidance.
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Hamiltonian of a system? [closed]
I have a three level lambda system with two ground states $\lvert1\rangle$ and $\lvert3\rangle$ and an excited state $\lvert2\rangle$, interacting with a classical field and the SPP mode of the ...
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Is it possible for both electric and magnetic fields to have longitudinal component in a rectangular waveguide?
I know a rectangular waveguide cannot support TEM waves, but supports TE and TM waves. In the TE mode, $E_z=0$ and in the TM mode, $H_z=0$ (where propagation direction is along the $z$-axis). I want ...
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How should I calculate the TE and TM modes on an anisotropic/uniaxial slab waveguide?
I want to find the equations governing the TE and TM modes on the following three-layered slab waveguide:
I know how to use the Helmholtz equation and solve for the boundary conditions on normal ...
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Mode propagation constant in optical fibers
$$\beta = k \sqrt{n_1^2 - \left(\frac{m\lambda}{2a}\right)^2}$$
where $m$ is one of the possible modes (from $0$ to $M-1$ where $M$ is no. of guided modes) and $a$ is the diameter of the optical fiber....
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Is there a generalization of mode coupling theory?
I am currently reading a lecture on coupled-modes theory and have a question regarding the ansatz:
$$E_\text{tot}=A(z)E_1(x,y,z) + B(z)E_2(x,y,z) \\ H_\text{tot}=A(z)H_1(x,y,z) + B(z)H_2(x,y,z)$$
and
$...
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Ambiguities in optical waveguide modes
While studying concept of slab waveguide mode, I got stuck on some problems.
In textbook(Yariv chapter 3 pg 112), for guided TE modes it tells that the mode function
is taken as
which means that the ...
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Helmholtz equation in a metal waveguide channel
I have a problem with the concept of solving the Helmholtz equation in a metal waveguide channel. An example in which I encountered a contradiction was that we have a waveguide channel with dimensions ...
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Phasors and propagating modes in a waveguide
I'm currently studying antennas. The notes I'm following, while discussing the EM fields at the antenna feed port, make the following statement:
It can be shown that a propagating mode in a ...
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How to determine the light rays difference according to book by Okamoto?
In the very beginning of the book "Fundamentals of Optical Waveguides" by Okamoto, there is a description of light ray propagation in the waveguide. I provided an updated Figure from it:
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How can evenescent coupling work if an evanescent field cannot transport energy?
This youtube video shows a simulation of evanescent coupling between a driven optical fiber and another that is not driven. I had never heard of evanescent fields so I looked it up on Wikipedia, where ...
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How to eliminate polarization mismatch in the Michelson interferometer based on single-mode optical fiber?
We are developing a mobile system for optical coherence tomography based on fiber optic Michelson interferometer. We are facing a problem of chenging the polarization during a movement of the fiber. ...
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Frequency and Wavenumbers in Rectangular Waveguide for TE01
In Chapter 9 of Principles of Electrodynamics by Schwartz, which is on waveguides and cavities, there is an analysis of a simple rectangular guide and a calculation of the lowest frequency that can ...
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Light scattering out of an optical waveguide?
I am trying to understand the concept of waveguiding, scattering, and total internal reflection. I have a question regarding the optical waveguides.
Let's consider an optical waveguide transmitting ...
user390982
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Dielectric wave guides vs metallic wave guides
I have a couples of questions regarding wave guides. First of all, why are dielectric wave guides better than metallic wave guides for wavelengths in the visible spectrum? Also, for non-ideal metallic ...
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Effective refractive index in waveguide
Suppose we have thin film with complex refractive index $n=4+1.5i$ placed on top of glass substrate. Does it make sense in this case to consider waveguide modes in the film? I used open source tools (...
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