Negative Temperatures? #thermodynamics #temperature #laser @yourfavouriteta

Uploaded July 2026 | Updated September 2026, 2 weeks ago

Temperature is NOT a measure of the energy of a system; it tells you how much energy it costs to increase the number of ways it can be configured!

Negative Temperatures? #thermodynamics #temperature #laser

Distributed Feedback Laser (DFB) demonstration

Phase Modulators for fiber optics - demonstration

$Phase- and frequency noise spectra explained! Link to python notebook used for simulations: https://github.com/OleKrarup123/NLSE-vector-solver/tree/main/TutorialVideos/PhaseAndFreqNoise-Video General explanation of amplitude, phase and frequency noise: https://ieeexplore.ieee.org/document/9973001 Explanation of electric field spectrum measurement and phase noise: https://www.youtube.com/watch?v=hfgaEjf1154 Thorough explanation of phase and frequency noise: https://silentsys.com/white-papers/laser-noise-metrological-metrics In-depth explanations of phase noise: https://www.youtube.com/watch?v=ggPdXWejMb8 https://youtu.be/qPUEhBeG2zM?is=ZOxWMkkv52HX3iv2 https://books.google.dk/books?id=iUld6xblvo0C&pg=PA45&source=gbs_toc_r&cad=2#v=onepage&q&f=false https://www.youtube.com/watch?v=McTOAFFK74s Examples of 1/f behavior: https://dsp.stackexchange.com/questions/74816/signal-of-frac1f-noise https://arxiv.org/pdf/physics/0204033 https://ieeexplore.ieee.org/document/1456550 https://www.analog.com/en/resources/analog-dialogue/articles/understanding-and-eliminating-1-f-noise.html Phase noise application notes: https://www.nktphotonics.com/wp-content/uploads/2022/01/koheras-laser-phase-noise.pdf Freq. noise application notes: https://www.nktphotonics.com/wp-content/uploads/2022/01/frequency-stability-application-note-version-1-1-.pdf https://www.researchgate.net/publication/282135028 https://www.koheron.com/blog/2021/07/08/measuring-laser-phase-noise/$

Nonlinear noise in optical fibers explained!

Erbium Doped Fiber Amplifiers (EDFA) demonstration

I am publishing a Textbook on nonlinear optics!