Merci pour ce cours ! Étant débutant dedans vos explications m'ont vraiment beaucoup aidé.
@vishwasshankar1322Ай бұрын
bevarsi
@FlyingFredd2 ай бұрын
Booster l'algorithme
@sanjanasharma69022 ай бұрын
Thank u sir very helpful for understanding the concept
@yhfhgf76473 ай бұрын
À quel cour cet exercice est associé ?
@michaelspinks98226 ай бұрын
Looks like you picked up some astigmatism and/or coma on that beam... doubling really accentuates the wavefront. :)
@michalmarek85427 ай бұрын
Great, pls have you any about use KTP 1064/532 on high power fibre laser /200W CCW Raycus and how many is real as output? Pls is very important. Thx for your reply
@LuckyGuitar498 ай бұрын
la musique de fond est elle vraiment nécessaire ? Personnellement ca m'empêche de penser et ça m'agace , je coupe le son :-) merci
@joeberta3689 ай бұрын
What else can be expected from a trumpian political stooge?
@chang-ronglin84629 ай бұрын
Very helpful, thank you, and I'm also interesting in the difference-frequency generation.
@jacobvandijk652510 ай бұрын
Can you do parametric downconversion in your lab? If so, could you show it? I love to see a single-photon being split in two ;-)
@nvspraneeth946810 ай бұрын
very informative!! btw i work on plasmonics ans use a 780nm SLD to excited gold nanorods, the maximum power if SLD is 20mW, i was thinking of exciing the interband of nanorods, so if I use a BBO crystal can I get SHG, of sufficient power of say atleast 1 or 2mW? thanks..
@The.captive.eagle.1410 ай бұрын
I have a set of lenses and I was looking for how to arrange them to become a long -term endoscope as possible ... Will you help me, Professor 🥴
@The.captive.eagle.1410 ай бұрын
I tried to understand, but to no avail 😂😂 It seems that I am below the novice level 🥴
@nassibaliouane465410 ай бұрын
Très bon cours, merci beaucoup!
@pbbisht196511 ай бұрын
Great, whats the rep rate and pulse duration?
@dccote11 ай бұрын
6 picosecond and 76 MHz
@dccote11 ай бұрын
Je l'ai changé. Je peux le remettre.
@tcharland1311 ай бұрын
Merci pour le thumbnail très flatteur!
@nikhilsen900711 ай бұрын
Thanks a lot for this Python library. What will be the limit of this tool? At what limit, it can't do things that Zemax can. In short, when should I consider using Zemax, and when is this python library good enough?
@xavierlarouche6264 Жыл бұрын
J'ai écouté 6 fois et l'information qui domine est que ma note à l'examen 1 sera inférieure à 0 en raison de l'effet tunnel.
@dccote Жыл бұрын
Le mieux serait d’avoir plus de 50% grâce à l’effet tunnel. Plus positif.
@xavierlarouche6264 Жыл бұрын
@@dccote Oui c'est vrai que ca peut aller dans les deux sens ! Clairement je n'avais pas assez d'énergie pour passer la barrière de potentiel de l'examen 1, mais ca peut juste être mieux au deuxième !
@chantianseng Жыл бұрын
How about different frequency generation using the same setup?
@dccote Жыл бұрын
Very different process: it is called down-conversion, and it is very weak. Typically, these are put inside an Optical parametric Oscillator to amplify.
@ykc1109 Жыл бұрын
Thank you for your explanation. Very impressive video! I have a quick question about the beam shape, which looks very elliptical. Is it because the incident beam is not perfectly round? Does BiBO crystal affect the beam shape?
@dccote Жыл бұрын
It is elliptical for many reasons, it is partly because it is incident at angle angle and that phase matching works well along one direction, not both. I made no efforts to obtain a nice beam.
@irozbelka3600 Жыл бұрын
J'aimerais savoir s'il vous plaît comment vous avez fait pour trouver le terme général "Cn"
@dccote Жыл бұрын
Le terme général s’obtient par observation. Rendu la, il faut reconnaître les termes.
@arena7839 Жыл бұрын
Im sorry if you explained it in the video but im very new to this stuff and didnt understand all you said. But when you got the new frequency how much can that be shifted? Is it only possible to shift in one direction or is there any other limitations for the output? For example if I had a infrared light source, could it be doubled into visible light; and if so what frequencies could it have shifted to? Again sorry if my question is weirdly formulated, I dont know what Im doing 😅
@dccote Жыл бұрын
The technique I showed here only "reduces" the wavelength, and with a single beam you can only double the frequency (half the wavelength) via Second Harmonic Generation. You can double the frequency if an infrared beam and move it to the blue-green visible if it is infrared in the range 800 to 1100 nm. But don't forget you need ultrashort pulses and fairly high power. Reducing the frequency requires a different strategy (optical parametric conversion), which is very inefficient and requires a cavity for amplification (optical parametric oscillation or amplification).
@biswajitdattaju69 Жыл бұрын
Very helpful!
@danielbosque1033 Жыл бұрын
Merci pour cette vidéo. Les mesures d'intensités et d'angle possèdent des incertitudes. Ces incertitudes sont t'elles prisent en compte pas la matrice pcov ? Si non, comment prendres en comptes ces incertitudes dans l'incertitude final de la valeur que l'on recherche?
@petevenuti7355 Жыл бұрын
I've always thought of frequency summation and doubling as if one was talking about a FM radio, but I only now am realizing it's about the interaction of the electromagnetic waves when they are also interacting with a third physical medium, whether it be it a heterodyne circuit or a nonlinear material , the mixing doesn't happen in free space , only upon simultaneous interaction with matter. How can light be FM modulated? What *are* nonlinear properties of matter that effect this interaction? Under what circumstances does *air* have nonlinear properties and what are they? In the case of a CO2 or nitrogen lasers (for instance), where there is an intermediate excited state that is opaque to the intended output frequency , would it be possible to opticaly pump such a laser with two other lasers who's frequencies separately can pass through the gas lasing material but their combined frequency is exactly what is needed to bump the atoms back to the desired excited state, maintaining the population inversion, therefore eliminating the need for cooling such lasers? Is there such an interaction?
@alexandrebedard928 Жыл бұрын
Un chef-d'oeuvre cinématographique
@fastandfishious34 Жыл бұрын
Est-ce que créer des blockbusters fait partie de la tâche professorale de Daniel Côté?
@dccote Жыл бұрын
Clairement pas: je suis en grève et je le fais quand même.
@benjaminlacasse2387 Жыл бұрын
Absolutely genius, most relatable video of 2023.
@emilemarcotte2782 Жыл бұрын
Performance digne des plus grands studios d'Hollywood 👏🏻👏🏻👏🏻
@prestonpoling900 Жыл бұрын
So I’m new to this… haven’t been to school but I was diving into quantum entanglement and here I am. So from my understanding is that the experiment using BBO crystals and lasers is done to measure photons and their entanglement. Is there a way to capture a larger amount of particular even without a clear entanglement?
@BoomaxAtlqs Жыл бұрын
Pour vous, c'est l'équivalent de vous servir d'un auxiliaire d'enseignement en temps de grève, ce qui est interdit!
@wendychung7015 Жыл бұрын
Merci pour la recette, ça l'air délicieux 😋
@RicardoTolentino-km9zf Жыл бұрын
Hi Professor, thanks for the insightful video, I had a question about the mount for your BBO @ 2:34, i can see the thorlabs rotating mount is crm1l but could you tell me what the piece is inside that holds the BBO? also the dimension of your crystal? thank you again for the video!
@dccote Жыл бұрын
The BBO came mounted in this mount. It’s probably from Casix or Castix.
@RicardoTolentino-km9zf Жыл бұрын
@@dccote If i use a half wave plate to rotate my input polarization to the crystal, is that effectively the same as rotating the crystal in the mount you have?
@imjyun Жыл бұрын
thank you so much for the detailed explanation, those are some know-how that only acquire through hands on experience, people dont teach them on paper or books =(
@frankclausen2506 Жыл бұрын
Realy interesting thanks.
@dianeboyer4656 Жыл бұрын
Bravo LuLu j'ai bien hâte de faire ta sauce, avec une nutritionniste avec toi je pense que ca va goûter le ciel.
@mithgil-cool2 жыл бұрын
Thanks for your share. It is a great lecture.
@flora52712 жыл бұрын
🤣🤣🤣🤣🤣🤣
@FrancoisRigaut2 жыл бұрын
Super ta vidéo Daniel!
@danieldaoust94902 жыл бұрын
Bravo Daniel, c'est excellent et hilarant!
@charlesrichard43702 жыл бұрын
Ça pourrait percer sur tiktok tout ça :o
@dccote2 жыл бұрын
J'ai pris la peine de dire que c'était le plus compliqué, et tout le monde écoute celui-là. Allez écouter les autres avant celui-là!
@delmarphotonics2 жыл бұрын
SHG and THG BBO crystals kzbin.info/www/bejne/aJO2h4ZoZa6Lqac
@emilemarcotte27822 жыл бұрын
Wow! Incroyable! Félicitations au chef 👨🍳
@dccote2 жыл бұрын
J'aimerais dire, sans aucune arrière-pensée, qu'en tant que Professeur, je n'en ai jamais reçus. Je commence à vous trouver poches, cher.e.s étudiant.e.s.