@pretoasted
Never lost me :) I appreciate having more technical videos around. So many dumbed-down videos out there, or just super dry/boring presentations of the information in PowerPoints or something, but you put it all together in a really entertaining, informative, and easily understood way.
@bensmith3304
As someone who works daily with ultrafast femtosecond lasers to watch neurons fire, I am really excited to see this video.
@michaelhess4825
As a network engineer designing fiber backhaul since 06, I’ve been fascinated with light and lasers for decades. Using EDFA’s and DWDM multiplexing, among other magic light tricks, I was super excited to get lasik. Best money I’ve ever spent by a long shot! And talking with the inventor was the cherry on top. However upon lying on the table and glancing over at the machine, seeing it boot Windows XP embedded, I did have a moment of panic!
@MarkMcCarty-i8n
Your videos are some of the best content on the entire Internet. I don't always get what you're saying, but you get me 50% of the way on some incredibly complicated subjects, which is saying something considering how little I know about these things. Please keep up the good work.
@yousefelsharkawy3723
I’m a laser physicist and I work in a company where we build and use femtosecond lasers! You have no idea how happy I was when I saw the title of this video 😭
@element_m2498
It is 1:50 AM in Germany (where I live) and I REALLY should have gone to bed by now. But the things you know and share with us are sooo interesting- I just could not stop watching! Thank you for sharing all your knowledge with us!!! 👍
@Muonium1
A couple hundred feet down the hall from me right now, hanging on the wall outside the room where it first happened, is the replica Nobel prize given to Strickland and Mourou in '18 for the invention of chirped pulse amplification in '85. We're designing a new laser now to join the 60 terawatt and 2 petawatt existing systems, which will compress half a kilojoule of laser light into 20 femtoseconds. We hope it will finally open the fully non-pertubative regime of strong-field quantum electrodynamics and permit the first exploration of true ultrarelativistic optics. The system should allow us to create extremely high energy >100 Gigaelectron volt electron beams in a SINGLE, 1 meter long, "flying-focus", dephasingless laser-wakefield acceleration pulse (an acceleration great enough to force the electrons to emit Unruh radiation!), to do direct neutron-neutron scattering, to squeeze hydrogen to over 1 terapascal pressures, and newly open a variety of other highly exotic physical phenomena to experimental investigation when the system is completed in about a decade. EDITED for clarity.
@AvocadoAfficionado
0 views after 3 femtoseconds. Bro fell off.
@hullinstruments
I'm always wishing you covered more photonics stuff. Super pleased to see this pop up today!
@Danji_Coppersmoke
Fan fact 1: Although we sometimes imagine a laser pulse to be a long beam, for a fs-laser which (common) diameter is ~1mm but for 10fs pulse, it is only 3 micron thick. So it is like a plate flying along its face direction. Fan fact 2 : Scientists can measure the oscillating electric field within a fs-pulse ( check SPIDER, FROG, yes real acronyms) and also modify the wiggling electric field inside that pulse ( check MIIPS ). That MIIPS is used to detect trace chemical ~10000 more sensitive(using resonant anti-stoke shift Raman in a single pulse). During Iraq war, an instrument was built using MIIPS technique to detect a trace IED chemical in the air from ~30 ft away by sending fs-pulses to nearby suspecting devices. Fan fact 3 : fs-crystallography (Nobel) once imaged/video atoms inside a nanocrystal gold during melting. In there, heating by fs-laser pulse was so fast that you can detect the electrons heating up first before the atoms (nucleus) heating up. (Edit. spelling)
@mekky3504
As an egyptian , ahmed zuweil is a celebrity to me and my people. I grew up with him as the idol to which every diligent student should look up to..he was a great man and philanthropist who always sought to increase the quality of education and the ability of people to access it. May allah have mercy on him
@TheMezzomorto
The last time I was gobsmacked by technology was one of your videos describing the complexity of euv semi conductor machines, before that it was another video of yours about semi conductor machines, but before that it was a TED talk about femtophotography quite a few years ago, thank you for bringing it all full circle with this one. You are without a doubt one of the most approachable explainers of your industry, and your channel has really expanded my horizons, THANK YOU!
@rbaile508
Finally a topic on something I work on. We use femtosecond lasers as they significantly decrease the heat affected zone created as they ablate the material before it can transfer heat to the adjacent material.
@ahmedhassan9485
15:56 Ahmed Zewail is an Egyptian role model. He inspired many youths and built a University in Egypt by his name where I graduated from. I am an admirer of his work and passion to help Egyptians with Love for his own country
@camo7716
I'm a former KLA employee, and spent a good chunk of my university years researching THz-TDS with a mode locked Ti:Saph fs laser system. Your recent videos have been hitting really close to home 😊
@bobdobs23
Brilliant, your ability to explicate a fundamental advance across disciplines is what makes YouTube a fundamental resource, indeed a library of Alexander .thankyou
@andrewpark7345
it’s so interesting seeing femtosecond lasers here, my dad had to get a femtosecond laser for work and talked a lot about the technology
@yannismarle7797
I work as field engineer in a well known german company specialized in lasers and i love your content. This video is actually very great explaining the whole history of technologic discoveries in laser field accurately, you even made me learn things i didn't know because i never bother looking up. Great content right there.
@tomasFL
Femtosecond lasers global market is dominated by Lithuanian country (to my latest knowledge is close to 80%) the market is small in dollars but it puts Lithuania 🇱🇹 on the level like ROC Taiwan 🇹🇼 in semiconductor league
@andersjjensen