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That the origination of Laguerre-Gauss modes didn't mention "angular momentum" in their work seems like an incredibly weak distinction. Angular momentum is clearly a fundamentally required aspect by their very existence in any classic analysis. These days, there is a tendency to re-invent old physics by "inventing" new terminology across several areas of physics, but most egregiously in the areas surrounding so-called "optical crystals" including around these helical propagation modes.

The best teacher, supervisor, mentor & a pure soul Madame Isabelle <3

presented so clearly that I can understand it with only basic physics! well done!

Excellent.

thanks for the upload!

whatever nerd lmao

Great lecture, By the who else can see a dog's face on green board the behind professor. Writing has been cleaned in the way using a duster that formed an image.

At about 9:55: 1keV corresponds to about 1 nm wavelength, not 0.1A. 100x off...

the equations in the power point presentation are not clearly seen.

This professor is active and explains the topic OAM in a very interesting way. I like him and his talk as well.

Hi i have found an error in 18:00 to 19:00 you tell about solving the equations but d(S)/dt is not equal to Gamma S but maybe equals to S^(dagger), can you help me with this?

video presentation, is not comfortable, barbecue the laser pointer is not visible (i know technically the content is different screen than actual screen with laser pointer)

Wow, very useful. Unfortunately i get here by very specific coincidents so no doubts its have a not such much views. But i hope owners of this channel not running to idea "get more views", because as part of world wide community agreement of transfering knowlege and information to all people independently of their wealth its absolutely beautiful and perfect. Thanks for teaching me something new, Paul Corkum

Imperial college London PCA lecture of Dr Donna Strickland bring me here

great guy, great teacher, great lecture.

Great lecture!

Just throw me the textbook already

where i can get the lecture notes?

A very relaxed lecture. No one has explained things with this much clarity and like a story.

Amazing lecturer and very interesting content!

15:40

At 34:16 in equation 3, I don't understand why P2 is expressed in terms of E1?

excellent! I'm new to the topic, but the speaker makes every point very clear. Bravo!

@ 4:36 We only see that two laser beams are converted by a crystal in four laser beams. Without the crystal it does not happen. So scattering is not demonstrated here ... "in front of your eyes".

at 34:54, is there a typo for the expression of centrosymmetrical potential? The restoring force term should not contain order of even, rigtht?

What do you use as a "phase conjugate mirror" sir? A Prism?

I need help... I have assignment about optical fiber

Amazing lecture with a balanced portion of information. Thanks so much Prof. Boyd for the lecture.

1:11:17 THG

What a treat to find this lecture!

Excellent Lecture by Prof. Boyd

Where can I get these slides?

i read his book before knowing about this lecture, and i always imagined him as such a lovely humble person who is also fun and talks about this subject with joy, and i wasnt wrong. we are so honored for his personality

💡 🌊 🌍 🧲 🛑 ✋🏽

Legendary Robert W. Boyd.. I've been using his book for years now

I wish I could know where he's pointing to since whenever he's pointing to something it's not being shown

Father of nonlinear optics...

This video helped me very much

06:14 those eye glass remind of Prof Boyd :)

The best !

this video lecture was incorrectly uploaded.

19:19 Can femto lasers be turned into laser weapons? Can the laser actually be one squared centimeter, at least in principle? Companies like Honeywell, Lockheed Martin, Raytheon, Northrop Grumman, and Boeing promote 1mw lasers. The HHG pulse "probe" generates 8 orders of magnitude more power.

Very interesting. Its a bit frustrating to not have his laser pointer on the slide.

Fantastic explanation

Thank you so much for your kindness ❤

Damn a rare combo! Genius mind and a one who can deliver it well!

One thing that occurred to me when watching this is that the resolution of the image is independent of how far away the detector is from the object, in the configuration where the object is illuminated with the patterns. Of course, you might need a telescope or other optical devices to increase the signal to noise ratio at the detector. I'm not sure where that setup with a close projector, but a distant detector would be helpful, but who knows.

The lecture was very good. But I hope there is an English subtitle.

Very good lecture

This video blew my mind quite a few times. This is some amazing stuff!