Questions tagged [fiber-optics]
Fiber optics is the study of optical fibers, which are thin pieces of high quality optical materials which are able to act as a waveguide for some frequencies of light. This waveguide or 'light pipe' feature of optical fibers allows them to transmit light with very low loss from one end of the fiber to the other.
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Reflectogram deconvolution via bilinear forms
I work with highly coherent laser light 1550 nm source traveling through singlemode fiber. EOM creates laser pulses ~100 ns length corresponding to $m\approx 10$ m length of pulse. I can tune laser ...
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How exactly was the quantity $\Delta \nu^{\text{clock}}$ measured in the PTB-MPQ long-distance chronometric levelling experiment (J. Grotti _et al._)?
An experiment involving two "ultra-stable" ${}^{87}{\rm Sr}$ lattice clocks has been reported recently [physics.atom-ph/2309.14953v3].
Of great importance there appears the quantity which J. ...
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Capacitance and propagation delay of straight optical fiber
Computer scientist by trade here, please excuse any bad usage of terminology or overgeneralization.
Today I finally understood how electrical capacitance turns every element of a circuit into a low-...
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Is the frequency difference between transfer lasers being measured in Strasbourg expected to shift when linking the SYRTE Sr^87 clock to one at MPQ?
Linking extremely stable optical clocks via an (suitably performative) "optical frequency transfer system" ("stabilized fiber links") is complicated business -- obviously. While my ...
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Why does supercontinuum generation look like hydrogen orbitals?
I have been researching online about supercontinuum generation, and came across the website of the Ultrafast and Nonlinear Optics Lab at Penn State. The site provides some info about ultrafast optics ...
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Model of a optical transmission line
The intensity of light through a medium can be modelised as $$I(x)=I_0\cdot e^{-sx}$$ where $s=a+bj$.
The real part of $s$ is the attenuation of the signal across the axis of transmission and $b$ is ...
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Transfer light using fiber optic cable
I wish to transfer light of a LED diode to a bit further distance. LED is soldered on a pcb, and I wish to see the light 20cm further from the PCB.
I could desolder the LEDs and use electric wiring ...
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How does the small radius of a fibre optic cable help in Total Internal Reflection?
I think my doubt is clear from the heading, I can't understand why small diameter of a fibre optic cable will help in increasing the rate of Total Internal Reflection? Everywhere it is answered that ...
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Power spectral density of a laser's frequency noise
I am a bit confused about what power spectral density (PSD) is in the context of a laser. In particular, I came across this paper. In Fig. 1 they show PSD vs frequency. As far as I understand, PSD is ...
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Is the divergence of the output beam of a collimator dependent on the NA of the fiber used or just on the core size and lens' $f$-number?
I have a single-lens collimator, which collimates the light emitted by a single mode fiber, which needs to emit a beam with a very specific divergence. Does a change in fiber NA (i.e., the fiber NA is ...
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Why the refractive index difference in a fiber waveguide between the core and cladding in a fiber has to be small? $n_1 - n_0 = 0.01$
I have seen this in every textbook on fiber waveguides. Why is the refractive index difference so small? Isn't it easier to have the difference larger because with a large refractive index difference ...
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Out-of-Phase Transverse and Longitudinal Components of the EM Field in a Step-Index Optical Fiber?
I'm trying to get a little bit of intuition, or even mathematically understand, the following statement:
Whenever a fiber is twisted, the resulting shear stress couples the longitudinal electric ...
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What exactly happens as light is exiting a fiber?
I am currently trying to learn the fundamentals of optical fibers, however most literature stops within the fiber itself.
What I gathered is that as the light comes out, it is no longer guided and ...
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What is photon direction of backward amplified spontaneous emission (ASE)?
While "laser causes excitation" is natural, CPT symmetry requires also "laser causes deexcitation" scenario, both used e.g. in STED microscopes through diode lasers.
In common ...
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Simulation tool for beam propagation in bent multi mode fiber
I am trying to simulate a beam propagation in multi mode fiber, I am looking for simulation tool that can simulate a multi mode fiber one meter long. Also I would like to add bends to the fiber, so it ...
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