You should try buildinga pulsed HeNe by AOM based cavity dumping a similar setup

Can you do the teardown of spectroscope?

my understanding is that free space to fiber launch, especially in devices based on small numbers of relatively high power off the shelf emitters, use so called "coreless fiber end caps" to facilitate setup and mitigate practical problems. they can be >10x larger in diameter (800 micron outer cladding high power multimode fiber with 9 mm end cap), with much greater mass to sink thermal effecss, dampen resonance and alignment issues (from microscopic movement or resonance driven by ambient noise or thermally)

Looks like this is first step to fiber laser used in metal cutters. How to couple few laser diodes into one fiber?

i dont see the red and yellow orange full spectrum like i seen the first video you done?

what are these attenuators you are refering to?

is that the shirt worn by chris knight in real genius?

why is the spot tingling? and as if blinking different colors, i understand freq doubling crystal but what exactly is ha[[ening here to be getting full spectrum when you are using violet laser?

is it possible to run this with a cw laser? like a cw nitrogen laser to pump the dies and get a steady output?

spectacular to see such a large crystal and they are at a reasonable price now? amazing to see the green beam just emerging out of it like that it is a nice optical illusion , i tried making a lamp pumped ndyag-doubled laser long time ago my dream was to see if i can get that beast working using 4x500w halogen lamps in a circular array wired in parallel so i only built the pump part of it and tried to get it to work with a dimmer switch but it was acting strange it would work at first then the light got bright as if the dimmer was not even there im not to savvy when it comes to more complicated circuit and electrical design, i have a glass tube that would presumably hold the ndyag inside the circular array cavity then i wanted to get the mirrors with mounts and eventually a doubling crystal and maybe have the whole thing water cooled using distilled water but it never went any further than building the pump which i still have and enjoy looking at once in a while , i did not get the rest of the parts though perhaps i was too timid with the costs and not sure of the success although i heard sam did manage to build one and get it to slightly work although it was weak beam coming out every now and then

I built this model back in 2004 in New Jersey - interesting feedback of the design. Great product.

Hey I found a really interesting paper about supercontinuum lasers using a water bath. Intense white laser of high spectral flatness via optical-damage-free water-lithium niobate module You might want to give it a look :)

The fiber cables are to electrically and thermo isolate the hv/hf group in case there is a failure you want the shutdown to still be able to detect it and do its job. I'm sure you know this just Mentioning for others interested in rolling their own controller

If you put two crystals in a row, does it frequency double twice (resulting in ~350nm at 1/4 total power)? Or does the resulting green beam pass straight through the second crystal, unaltered? I'm curious how two in-line frequency doublers differ from a triple harmonic crystal, if any. Disclaimer: I do not understand the phsycial principles/mechanisms lol

How did you connect it to the toughbook?

what is the purpose of those brewster windows do they reflect discard certain unwanted frequencies or was it to polarize? i still do not comprehend what polarizing does but you still need an oc right?

If the bayergrid is organic. Why not try with enzymes?

It's like a smoke ring. You push a wave through the middle of another wave of course you're gonna get self-focusing

Can you do a video on a circuit to start up an arc lamp?? I have some CW xenon laser lamps and I can get a spark through them, but I can't transfer to the low voltage DC (180V@20A) quickly enough to keep it lit. It's for a CW NdYAG build and there's so little on the web 😵‍💫 love your videos!

Great project, thanks for sharing!!

that is a green color kot yellow color.Some green laser has this type of green instead of deeper green.

On the raspberry pi 5 I get an error "ModuleNotFoundError: No module named 'cv2' Solved, forget to install openCV :) Works now!

yeap, interesting video, thanks! Could you share how did the DS1054z? thanks.

I think you could improve the design using an elliptical cavity, that way a great percentage of the light is reflected to the laser rod

Now his I call a laser. Electrolytic capacitors are of short life, about 3000 to 5000 hours at nominal voltage and 70C or so. Then they fade out and usually the power suplies stop working. It is better to use other cap technologies to make them to work again.

Liked and subscribed

0:56 Yooooo! 😂 and @Les' Lab that shirt is so smart. Nice GaAs reference, among other things

Enjoyed this. Thanks. I look forward to scoping your channel. Subscribed. Cheers

The switch is very much similar to what I made for a Xenon tube switch working at 1500 V with a selector for various time delays. Those were made by different combinations L And C..I used HV thyristors as switches and inductive triggers

Thank you so much for this I'm very new to this things can you please help me how to interface the camera with the raspberry pi. What are the material needed for the same( model)...... I'm a student....Thank you so much in advance 🤝🤝.......please respond🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏🙏

Hey narrator... Aren't you the same guy that narrated Asianometri's channel? Sound guys sounds similar 😅

Really cool project. Possibly uneducated question, would you achieve greater resolution by tilting the spectrum scope relative to the camera? My thinking is that if your sampling line covers from the bottom left of the spectrum to the top right of the spectrum you’d have more pixels to sample?

Les, I was wondering about the series-injection xfmr: Can you tell me... 1) what turns ratio you used 2) the capacitance of the primary trigger caps 3) the voltage to which they are charged at firing I am assuming it's the toriod that is partially visible....would help greatly... THANKS MUCH!!! --dAle

might i ask how did you focus the 337nm beam into the fiber? how did you connect it to the ml100? how did you achive focus as everyy glass blocks 337nm, did you had to use a special fiber core?

I remember when I was about 11, doing a phd on fire. I was sitting by the window on a cool autumn day with a reasonable magnifying glass burning paper with the suns rays. I then had the brilliant idea to try using mirrors. I reached a point where I decided to reflect the tightly focussed light back at the sun and the stupid child I was , I was overcome by fear that I might blow up the sun so I did it anyway. That day I truly understood reflected light and the energy of absorbed light.

I bet the reason I cannot find the ED-100A on ebay is due to this video! I can't find the maximum pulse rate this unit is specified to be accurate at, does anyone know?

Would you be better off using ir less camara lens?

Would you publish a known set of peaks ? Will they work with a telescope?

Brilliant using a spark plug, this was just the great idea I needed! Thank you!

Awesome! What would be needed to make a spectrometer to measure something like 1200-1700nm spectrum?

// install if not exists pip install virtualenv // make environment if not exists virtualenv -p python3 env source ./env/bin/activate pip install a pip install b pip install c pip freeze > requirements.txt git add . git commit -m 'init project' ------------------ // install if not exists pip install virtualenv // make environment if not exists virtualenv -p python3 env source ./env/bin/activate git clone ... cd project pip install -r ./requirements.txt

That's nice - 30 minutes of useless chatter, 3 seconds of something I won't wait thar long to watch...

Gee. Thanks for that useless arrow in your thumbnail. There's no way anyone would have possibly known what the title of the video was referring to! /s/s/s/s. Blessed be the clickbaity useless arrows because it shows who values using clickbaity techniques over content and shows me which channels to block. Clowns. Another channel blocked. Blessed be.

Gee. Thanks for that useless arrow in your thumbnail. There's no way anyone would have possibly known what the title of the video was referring to! /s/s/s/s. Blessed be the clickbaity useless arrows because it shows who values using clickbaity techniques over content and shows me which channels to block. Clowns. Another channel blocked. Blessed be.

Gee. Thanks for that useless arrow in your thumbnail. There's no way anyone would have possibly known what the title of the video was referring to! /s/s/s/s. Blessed be the clickbaity useless arrows because it shows who values using clickbaity techniques over content and shows me which channels to block. Clowns. Another channel blocked. Blessed be.

Death to useless arrows in thumbnails.

Hi! Thank you for the informative videos, you did a great job. The question is, how to measure or test the power of the MNL-100 laser beam? It emits pulses with ultraviolet radiation. How much power should this radiation have?

Great project. Congrats !

I thought your were going to say that reflecting a LASER beam back on to itself could be used as a columnator for a telescope, I have such a laser for that purpose. BTW: I have two old, previously functioning HeNe LASER tubes, I know one is from Spectra Physics and it was bright!! It had a rating of 6.9 mW on it, but I suspect it was much more than that. I have no use for them, plus a solid-state HV power supply that powers them. When the tube sputtered and went out, I'm told that someone with the right equipment can revive them. If you're interested in them we can work out how to get them to you, only the cost of shipping. I'm in the SF Bay Area. I am cleaning up my electronics lab and really hate to junk things that potentially someone else could use.

Hi, I am a PhD student at ETH Zurich. I need a camera with as small pixel size as possible to image an optical lattice. The Pi camera v2 would be perfect for this except for the bayer filter. I tried removing it with various chemicals without success. I was wondering if I could pay you to debayer a few of these sensors