How a Fiber Laser works & how a 30w fiber laser can output 24kw of laser power

[@ricklaser2846]

I´m physicist and work with laser since 1983. Dear Roger, I have never heard or even thought of such a simple yet complete way of explaining the operation of a fiber laser to a layman as you have done. Genious.

[@rogerwebb9600]

You are very welcome

[@Raddesigneng]

I'm a postman and I've never heard or even thought of such a simple yet complete way of explaining the operation of a fibre laser to a layman as you have done. Genius (without the o)

[@MappingRantauprapat]

really?

[@98f5]

A laser with a thin flexible glass rod to transmit the light

[@leonardveranojr5300]

You can always tell when someone knows what they are talking about by the simplistic analogies the use to explain something other people don't know. You are a master of your field. You made it very interesting and understandable. Thanks Len V

[@rogerwebb9600]

I appreciate that!

[@BinaryBlueBull]

Fully agreed. I often say the same, that the mark of a true master of a certain topic is that he can explain it in such simple (though 100% correct) terms and analogies, that any layman with a bit of intelligence can follow along and attain an understanding of how that particular very complex topic works and fits together. The terms "expert" or "master" are used waaaay too frequently. It's relatively "easy" to become a professional. Becoming an expert or master, even in one single part of one single area of expertise, takes a lifetime and most people will never get there. One of my main life goals is to be able to say that I'm an expert in one single section of the subject area I work in, which is IT and more specifically, enterprise datacenter virtualization. I really hope I'll get there some day but it will take many thousands of hours of applying myself

[@walterbrown8694]

Glad you clarified the 30 w / 24 kw issue as ave./peak power ratio. Retired radar/EW engineer - decades working with pulse radar (and other systems) where that distinction must be carefully stated and understood.

[@FullFrontalNerdity-e3z]

The ability to say "MY fiber laser..." just shows what amazing times we live in. This is just plain cool. It's a rail gun for photons.

[@Hellhound604]

Thank you for explaining this so clearly. I have always wondered about those specs of fibre-lasers.

[@programorprogrammed]

What a wonderful combination of complexity and simplicity in its design

[@annoorkhan4219]

It's very helpful, Thanks.

[@rogerwebb9600]

You're welcome!

[@karljolley8346]

thank you for that explanation ...

[@PY2JV]

Teacher, thanks for the explanation! we have an IPG laser source here.. God Blessed You

[@subdynoman]

I understand capacitive and inductive resonance in sound systems and in electrical circuit, as I discover more about light and sound it's amazing how their behavior is so similar. Now I'm beginning to see that light and it's effective mediums also obey the same laws kinda just wow and that you 👏

[@rogerwebb9600]

Yes, + speed of light over time!

[@rogerlikes]

Thank you Roger, Roger

[@sparktechedm]

Nice class, thanks for sharing

[@rogerwebb9600]

My pleasure!

[@jessetutterrow4320]

Excellent explanation! As an older person I just wish that the beginning still images were larger so I could see them better.

[@Queracus]

Lumentum makes good fiber lasers. Especially for industry material cutting

[@sto2779]

Excellent explanation, always wondered how fiber lasers worked...

[@loveengineering5775]

huge fan of your´s videos sir thanks for making such informative videos.

[@rogerwebb9600]

It's my pleasure

[@gayatrikheralia2580]

Thanks for the video

[@creo_designer]

It's like a light accumulator, WOW!

[@malakiblunt]

After watching styropyros fiber laser vid, to see what they can do 😱Came here to find out how they work

[@fookingsog]

I'm not so interested in the diode but moreso interested in the driver circuitry. Would be super interested to see what it looks like on an Oscilloscope!!!

[@sriramneravati5048]

Nice video!

[@rogerwebb9600]

Glad you enjoyed it

[@NRiggiKnives]

Helpful videos, been trying to dial in titanium color settings on a 20 watt fiber. Green has been elusive!

[@DSAK55]

I'm afraid to ask what experiment you'd doing with the chickens

[@MikeJohnson-hi1mu]

Thank you Roger for your video. I've worked with HEL's since 1973. I even got to play with ones used in the "Star Wars" projects (ABL). But I never had a chance to do any design of a fiber laser system. Please answer me this. Is the fiber used in the amplifier doped, and if so with what? What are the amplifier's absorption and emission frequencies? The oscillator laser diode operates at what wavelenght? Do you have any energy level diagrams and the timing and energy levels that are involved. Thank you very much for your time and help. Mike J.

[@constantinosschinas4503]

So you need to gather 800 laser pulses before the fiber releases the captured energy? Is it why many lasers are needed, to make the gaps smaller?

[@petevenuti7355]

Insightful , I learned something new, but, also seems overly simplified for someone who knows a little bit.. So is the control laser basically what gets amplified, and the fiber itself the lasing medium with the diode lasers as energy pumps? And if so why doesn't it spontaneously emit? Or Is it more like a q-switch, where all the energy of the diode lasers get stored in the fiber and the control laser operates a q-switch to let it out? And if that is the case how do you keep them phase matched? The way you described it , I could interpret it either way. Also, how long is that fiber? Thanks

[@rollmeister]

Pure genius

[@multiforc271]

hi, ty for the video. i have a very elementary question, optic is not my main field: how to introduce a series of laser beams into a single fiber optic ?

[@lazaryanya9407]

They use special fiber optic junctions that can introduce laser light from 3 sources into one optic cable. However not all of the laser light is in the middle core fiber. The loop or amplifier section moves all the laser light into the middle core fiber. You never get more power out than what you are putting in. The explanation is lacking in that regard.

[@hamedshanfari2493]

Thank you

[@rogerwebb9600]

You're welcome

[@srinathmallikarjunan1259]

Thank you for the beautiful explanation. How much energy can the fiber optics store ? I assume there would be a limit. Convetional lasers use a resonant cavity to build up the energy and release it in a burst. How does a fiber optic coil perform an equivalent function ?

[@dii1231]

I would buy at TOPTICA! Other than that, great video!

[@Aufenthalt]

Hello Roger, I di Not understand why the diodes have to fire in sequence. Couldn't they fire simultaneously? Thanks

[@bicates]

Thanks for this excellent explainer... out of interest, does the Dragon weapon grade laser, work on a similar principle?

[@martinotalotti8986]

Nice explanation. Talking about engraving results on metal of a particular q-switch fiver laser, which is the variable that affects the most the edge of engraving on steel? I have three different fiber galvo laser, one of these is equipped with a variable focusing head (3d galvo), this one gives the less amount of bevel on very small engravings on metal, for example brass or aluminum, and also steel. This is a raycus 50w q-switch generator with a 200x200mm work area (not change able ). I suppose it has a thinner ray but not sure it is for that reason. The other fibers raycus 30w and jot Mopa 60w. With 160 lenses.

[@FranktheDachshund]

Great explanation! What if you used 16 CO2 lasers to produce the pulses instead of the 16 diode lasers.

[@omsingharjit]

So this is similar to q switching in fiber right ! But what caused in fiber to q swich ? And in case of co2 laser this q switching process should be different right?

[@rogerwebb9600]

Totally different

[@Samuelir96]

I thought my local cockatoos had come to visit but it was in the video

[@gangleweed]

I have often wondered what happens when you shine a torch into a container with light impervious walls.......do the photons build up and then at some point burn through the side wall or am I on the wrong track?

[@qss6609]

Great tutorial, thank you! I have a question. There are numerous pumping laser diodes to produce rated output power. If pumping diode fails, I presume the output power will be reduced. Is there a way to test all pumping laser diodes functioning correctly? Does the fiber laser manufacture, like Raycus, provide the functional diagnostic tests?

[@mackenzieb-eu3mf]

I would also be keen to learn the answer to this question as well

[@cantstopthefunk22]

So there are currently laser welders on the market that list 1500w, 2000w, etc. outputs. What inputs would you machine need to be able to produce a similar beam which is capable of melting steel?

[@rogerwebb9600]

It all depends on the application, I have a video of this laser-cutting stainless steel on my channel

[@itamar8424]

Thats cool such a great explanation I have a few questions though how does a fiber laser increases its power is it by adding more diodes or using diodes with higher second completely theoretical if I want to make a very powerful fiber laser can I use c02 tubes instead of diodes or would having to wait for the chemical reaction in the tube take too long

[@zohirlon6059]

sir i have question is possible to run 50w fiber laser source with co2 laser controller such as ruida for exmple ? thank you sir

[@rogerwebb9600]

Sorry no

[@zarpli]

thanks!

[@rogerwebb9600]

No problem!

[@NotJustCreative]

So, basically, it works like multiple people shooting bb almost at the same time at the same target delivering equivalent output similar to a single shotgun firing a birdshot. That's what my brain got out of this. Does this apply to fiber lasers that can cut metal too?

[@vancelanger7749]

how do you get all those 2W lasers directed into a single fiber?

[@xiaotianchen9912]

Is it a CW laser? But why the laser diodes were switch on and off?

[@othoapproto9603]

Thanks, I think the word you were looking for is Pulse.

[@rogerwebb9600]

Yes! Thank you!

[@othoapproto9603]

@@rogerwebb9600 Again, thanks for the wonderful video. Was wondering how they worked. I understand elector magnetic coils and capacitors. Didn't know a photon could be stored up as a charge.

[@apocraphontripp4728]

Sir, respectfully, I have a technical question. A lot of the lasers light is waisted in an open beam. You can always see the beam, given proper optics. That light is wasted. Unless you focus the beam near infinity, then cram the beam into a fiber wire and take all the normally wasted light to increase the density of the beam. What happens without the seed lasers??? Think of it this way. Your holding a high-powered pointer thur a magnifying glass to its smallest point on to a glass top table. What do you see the laser looks like on the other side of the glass...Super diffused. That doesn't happen in the fiber. No room to diffuse. It harnesses the light that would normally be wasted, and it does that from 16 lasers. Not a capacitor, its a barrel. Could I be right?

[@AusWorkshop]

That's all well and good but will it generate the needed 1.21 gigawatts?

[@Yngvarr77]

you need multiple lasers for that

[@AusWorkshop]

@@Yngvarr77 Yes, and a flux capacitor I think. 😃

[@kurtbilinski1723]

I almost expected you to stop part way through your presentation, saying "Just a minute", we hear you go outside, there's a tremendous "Bang", and you come back in, continuing with "birds dealt with..."

[@bergfpv6486]

Yeah. Sounds like he lives in a tropical rainforest. In that case, it wouldn't be so easy to 'deal with' the birds.

[@capturepointltd6344]

​@@bergfpv6486.. could close the window!? Just a thought.

[@svocklit700]

Do the fiber laser in sink and how can you tell they fire in sink? What happens if the fiber laser didn’t make pulses and was just emitting power? would the heat of the laser increase.

[@herathliyanagerathna7459]

Tks sr.

[@hikolanikola8775]

looks like a mini particle accelerator to me

[@BriarBeats]

God Bless you Roger In Jesus Name Brother, Thank you for putting all this information together, your time and explanations!

[@JonnyFunFun1]

Maybe the word you searched for is accumulator?

[@africanelectron751]

I wonder how ipg is doing given the situation in the world.

[@Yngvarr77]

Judging by the Russian R&D and production centre they are are doing well.

[@jacobsvickers3945]

I have a background in physics and it's been awhile since I have played with the mathematics but I'm trying to combine diode lasers to melt and or weld steel wire. This is for purposes of additive manufacturing. Are fiber lasers practical for this application?

[@rogerwebb9600]

Yes I think a fiber laser will do this

[@moloysarkar1725]

Yes they are, we're already doing that work in our lab here in India.

[@jacobsvickers3945]

@@moloysarkar1725 how much do they cost?

[@fabiocamo]

Congratulations for the explanation, very good! But I still have a doubt, I want to buy a 1500W portable laser machine, its power consumption says it is 4.8Kw/h, input power is 220V... I need to use a power stabilizer to avoid fluctuations in the power grid wherever I go to work, but because of that peak power I'm in doubt now, will the machine power supply have this peak power of 24KW? Or in the power supply (energy input) will not have this peak? Thanks in advance for the tips.

[@marianodeanquin]

Se puede hacer una soldadora laser casera comprando componentes sueltos?

[@rogerwebb9600]

No sorry

[@JeffereryFlaherty-oe1ze]

I have a vision of the future when the spark plug of my lawnmower does not get fouled with carbon and gasoline. Do you think you can make a laser spark plug?

[@chunliu6232]

where i can buy this

[@rogerwebb9600]

Thunder Laser

[@varinaboy19]

Trumpf lasers best of the best

[@JinKee]

Have any Fusion researchers upgraded to fiber laser? Will the National Ignition Facility upgrade to fiber?

[@sajadsaber]

wanna let you know you are awesome

[@magiclay]

Soooo how i turn my 30w fiber into a 24kw???????

[@zaddle6883]

cascade more lasers and do optical loop

[@Didisixty]

First of all you have to understand the difference of pulse power and average power. A Fiberlaser is a Pulslaser. 24kW is the Pulse Power of 1 Pulse. 30W is the average performance. If you have a Pulse power of 24kW for a few Nanoseconds and a break for 500u Seconds to the next Pulse that means it is a average power of 30 Watts.

[@bendustin7609]

Is that a wand?

[@rogerwebb9600]

Yes it is!

[@kland15]

I have a 50 watt laser. So is the math 30-24=6 so 50-6=44. Is my laser 44kw? 0:01

[@rogerwebb9600]

Hi, it's not quite that linear, it is verry complex but the fiber itself is an accumulator of photon energy similar to a capacitor (impulse battery) it charges up over time and then discharges very quickly. this all happens in a timescale of billionths of seconds.

[@kland15]

@@rogerwebb9600 ok, thank you.

[@kland15]

@@rogerwebb9600 could you please tell me what a seed laser does? I’m guessing that it’s fired directly into the fibers core just enough to excite the other photons to attach to it to get out.

[@johnstarr2001]

Not sure how the amplification works. In my eyes I see something like this to mimic in other ways like electricity, water, air....

[@mohammedzaidkhan5687]

reminds me of yhbw

[@Sir-Dexter]

nice..3w in 1000w out ....ok