Nick Karpowicz

@NickKarpowicz
16 Followers
55 Following
23 Posts
Physicist at the Max Planck Institute of Quantum Optics
Garching / Munich Germany
+ Ultrafast / attosecond / nonlinear optics + programming + indiepop + vegan
Lightwave Explorer is my open source nonlinear optics simulation
Lightwave Explorer Repohttps://github.com/NickKarpowicz/LightwaveExplorer
Pronounshe/him
Nick KarpowiczFeb 8
New Lightwave Explorer update video :) https://youtu.be/JY4wm2e7y_M
Lightwave Explorer 2026.1 Update: Complex input beams

YouTube
Nick KarpowiczJan 5
https://youtu.be/gk1X0ATHzMw I have opinions on operating systems 😅
Nick KarpowiczNov 8
A nice thing about releasing simulations as open source is seeing what people do with it; nice work Tim & co! https://opg.optica.org/oe/fulltext.cfm?uri=oe-33-23-47840
Nick KarpowiczSep 4, 2025
https://nickkarpowicz.github.io/widgets/frog/
Hi ultrafast people! I wrote a FROG reconstruction that will run entirely in your web browser. This I why I like #marimo so much :) The python/rust code for it is all in our attoworld github repository. Right now it only load the .dwc format that we've been using since ancient times, but if you want to use something else just send me an example!
Nick KarpowiczJun 13, 2025
https://www.nature.com/articles/s41566-025-01658-5 Our research on measuring the field of pulses that compress themselves below a femtosecond, just published in Nature Photonics (open access)
Field-resolved attosecond solitons - Nature Photonics

Combining attosecond metrology and soliton dynamics in hollow-core fibres, the generation of attosecond laser pulses from the deep-ultraviolet to the near-infrared regime and the measurement of attosecond solitons with 350-as durations at optical wavelengths are demonstrated, providing an efficient route to generate intense isolated attosecond pulses complementary to those based on high-harmonic generation in gases.

Nature
Nick KarpowiczJun 13, 2025
https://youtu.be/TmeMYNXZgh0 Here's a little video summary of our latest paper!
Paper chat: Field-Resolved Attosecond Solitons

YouTube
Nick KarpowiczMay 29, 2025
https://nickkarpowicz.github.io/widgets/group_velocity/ a little web toy with Python to show how group velocity works to my Photonics class, happy with what Marimo lets me do :)
Nick KarpowiczApr 16, 2025
Just upgraded my work PC to #Fedora 42 #KDE edition. If you haven't tried Linux in a while, I can strongly recommend this distribution. It's reliable and respects your autonomy, an increasingly rare thing.
Nick KarpowiczMar 21, 2025
I'm really enjoying marimo as a replacement for Jupyter notebooks! The fact that I can make little interactive widgets accessible by the web will be great for next semester's photonics course. Here's one for setting up ultrafast pulses for Lightwave Explorer https://nickkarpowicz.github.io/widgets/pulseviewer/
Nick KarpowiczFeb 12, 2025

I made a tutorial for using the finite-difference time-domain mode of my Lightwave Explorer open source project, if you'd like to have a look! https://youtu.be/4njswvog4bo

There's also a new release available on the github repo: https://github.com/NickKarpowicz/LightwaveExplorer

Lightwave Explorer tutorial: FDTD

YouTube