A nice part of releasing code as open source is seeing what people do with it; nice work, Tim & co! opg.optica.org/oe/fulltext....

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.

www.nature.com/articles/s41... Our research on measuring the field of pulses that compress themselves below a femtosecond, just published in Nature Photonics (open access)

youtu.be/TmeMYNXZgh0 Here's a little video summary of our latest paper!

nickkarpowicz.github.io/widgets/grou... made a little web toy to show how group velocity works to my photonics class :)

Announcing a PhD position starting October 2025, on Applications of Machine Learning in Ultrafast Nonlinear Fibre Optics. The advertisement will be out soon, but my email is easy to find, so please send me a CV if interested. Experience in experimental & numerical photonics highly desirable!

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 nickkarpowicz.github.io/widgets/puls...

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! youtu.be/4njswvog4bo

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

Did you know that if you pay for Microsoft Office, they just opted you in to paying extra every year for access to their AI slop machine? Luckily, I've been dual-booting Linux for a while now, so it's the perfect opportunity to cut ties with them.

I'm hiring! Please share!

I'm seeking a talented and motivated scientist to lead a research programme developing ultrafast light-source technologies in collaboration with a major player in the semiconductor lithography sector.

Come and join my group at Heriot-Watt University, Edinburgh, Scotland!

youtu.be/v5O0UOUdfKE?...
New Lightwave Explorer/optics tutorial on birefringence 😊

I have two 3.5 year PhD positions available in my group (worldwide eligibility). Please share!

I'm seeking motivated and capable PhD candidates who wish to work on state-of-the-art ultrafast light source science and technology.

www.findaphd.com/phds/project...

www.findaphd.com/phds/project...

Steam replay informs me that I had some anxiety this year. #StardewValley

When a student comes to you after the lecture, and prefaces a question with "I was too embarrassed to ask in class since it's probably obvious," you know it's going to be the most insightful thing you've heard all week.

Honestly, I'm skeptical of social media platforms, but it seemed like joining this one now might help hasten the decline of a bad one, so I'm giving it a try

youtube.com/watch?v=qlcy...

Here's a new tutorial video for using Lightwave Explorer, my open source nonlinear optics project. This one's about adding new crystals!