Slab Waveguide Explained

/ edmundsj
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The slab waveguide is the simplest and most important waveguide model you will ever learn. By analyzing the slab waveguide we can understand how interference causes self-perpetuating patters, known as modes, to successfully propagate down the waveguide. These modes are at the core of all waveguides, and understanding when they exist and how to arrive at them will allow you to grasp more complex waveguides and optical systems.
This is part of my graduate series on optoelectronics / photonics, and is based primarily on Coldren's book on Lasers as well as graduate-level coursework I have taken in the EECS department at UC Berkeley.
Hope you found this video helpful, please post in the comments below anything I can do to improve future videos, or suggestions you have for future videos.

[@hadigmail]

Excellent explanation but Can’t find the next video!

[@zakirreshi6737]

Thanks 😊...you told in last lecture about elliptical polarizated will be discussed in next one!

[@n33l85]

Can you make a video on rectangular waveguides

[@tomerkronik]

Great video. I can't find the next video referenced to in 9:32... Is it up on this channel?

[@knightofhyrulelink7531]

have you find it? I don't know what to watch next lol

[@desiyolo]

Woahh woahh woahh

[@gianlucamazzi7878]

It got me good

[@Kale514-pt8tg]

Where can one find your later waveguides videos?

[@tamaraamro7648]

Hi , Thanks it is a good explenation . But what is the title for the lecture that follow this ?

[@PradierLeo]

Hello, are these explanation also valid for an flexural wave propagating in a elastic plate ? Thank you !

[@khurin3938]

excellent explanation!!! which book you are following for modes in optical fibre waveguide

[@muntoia]

Thanks!

[@JordanEdmundsEECS]

Welcome!

[@Saptarshi.Sarkar]

I laugh so hard whenever he draws the O.o

[@dianaxie88516]

can you also give an explaination of how does the DBR reflectors work? THanks

[@JordanEdmundsEECS]

Ah this is such a great topic! Much of my Ph.D. is actually on distributed Bragg reflectors. I've added it to the list.

[@ryanyi8900]

Great video! I have a question about the reason why the wave can not construct with other fraction to infinity is that the wave in the waveguide is not a plane wave, according to your video. So if there are two waves in free space which are discribed as sin and -sin, they interfre with each other and get totally canceled. Will it happen or not? Does the process obey energy conservation? Thank you!

[@davide8228]

Hi Ryan, I can try to answer your questions. In free space if two waves meet each other, one sin and the other - sin they canceled, because in each point(in space time) they have the opposite value. For the conservation of energy there aren't problem because the avarege value don't change, in INPUT we have sin that have 0 as avarege, and in output again 0. This is only an intuitive explanation, analytically you have to consider the area of the signal for the energy and not the avarage value.

[@ryanyi8900]

​@@davide8228Thanks for your detailed answering! Now, I have some new perceptions about this questions which I came up with a year ago. And I want to share it with you. Recent, I learned a numerical software for simulating electromagnitic wave propagation called FDTD. I ejected two plane waves, which have a totally opposite amplitude. I set a monitor to record the propergation of two wave. No electric field is observed. So, it is just what you say, the two waves canceled. They did not disappear but propagate in the space at the totally oppsite pace.

[@davide8228]

@@ryanyi8900 thanks! I will try that software ( :

[@alexv2053]

Abrupt ending and next video doesn't follow the content

[@luphiax4239]

why dont we consider also the wavefront in the middle?

[@onurtans3363]

There is a problem at the end of the video :(