Trapping a Beam of Light In a Loop Of Fiber Optic Cable

A few published studies talking about microcurrent devices:

Wound care with electrical stimulation:

In this video I show you how optical fibers can trap light using total internal reflection

[qg]

I'm a telecoms engineer that installs fibre and we use red lights to find faults in our telecoms network. The light once shone through can be seen through the fibre at a few kilometers! 👌🏽

[calestolle]

I love how this channel brings a sense of whimsy to science. Thank you for your material!

[prestonburton]

Awesome thought experiment! i learned two things - why fiber needs to have repeater/amplifiers every several km, and - most importantly, i can purchase a device that will turn my 60+y old face, into someone only 20! its an awesome day, today! (seriously, i always enjoy your video's! it is so exciting for every youth - for me, it was transistors at they time they replaced vacuum tubes/valves! God bless you!

[bazoo]

This would be a good place to mention laser ring gyros and imperfect ("scratched") planar lightguides used to light opaque ePaper screens (like Kindle) from the front.

[StuffandThings_]

I wonder if you could use fiber optic cable and a laser to determine radius of curvature easily. Use different materials with different critical angles and different laser colors, wrap the fiber optics around the object, and boom the areas with a higher radius of curvature than a preset value will light up!

[georgedunkelberg]

Is photo synthesis a stored light by tree leaves? Is "stored-light, Energy?"

[malayali_here]

You don't have to open the joint between the ends of the cable. You can simply bend at any point 😊

[cristianbataturescu]

What if you add a mirror ball on that cable. Is it going to last longer ?

[carldalsasso]

Store a small amount of light for a period of time in a confined space? Tritium Vials was first to mind😂

[heroclixrz]

Could you hook up an oscope and probe before/after a long loop to see the delay?

[nfrl-hsly]

How to store light in a cable loop? Two words: Photonic superconductor. All we have to do is discover that.

[eskimocommotion]

How about in a vacuum inside mirror box with magnetic switch?

[darrylpioch]

Fiber optics + lasers is going in a certain direction towards a realm of really amazing and extremely dangerous devices (multi kW IR cleaning & welding lasers hahaha)

Can you bring out an extremely destructive laser soon? 🥹 With styropyro being dormant we need someone worthy to temporarily fill his role

[GeoffryGifari]

I thought the reason why we shouldn't bend the fiber optic cable too much is because the glass inside would snap

[BriShep]

Surprising that you didn't mention Lene Hau at all. In 2001 she became the first person to stop light completely, using a Bose Einstein Condensate.

[SIK_Mephisto]

The speed of light can be slowed down depending on the medium it travels through. This may be a fun concept to look into to further explore light confinement.

[kilroy]

The trouble is light is invisible until it illuminates something visible, and once that's true, light has left the system because it's dispersing everywhere.
So even if you successfully trap light in a perfectly reflecting fiber optic cable, it's such a tiny amount length wise that it would require an extremely slow motion camera to witness the exiting light illuminating anything.

[alexnather]

Action lab never fails to entertain and "enlighten" me 😀

[kalvincochran]

You’ve taught me so much physics and inspired me to take a physics class over the summer which has expanded my knowledge so much and I understand your videos so much better and I understand my other studies better because it’s changed the way I think about things

[WouterVerbruggen]

The thickness of a fible optic cable core depends on what kind it is. If it is multimode, it is typically 50 microns which is around the thinkness of a human hair. Single mode cables are around 9 microns, a 5th (not a 10th) of a human hair. The closup you show is a thicker multimode one, the one you play with a single mode.