This isn’t DPSS, it’s just a frequency doubled diode - the thing you’re calling a resonator isn’t doing any resonating, it’s just a temperature controlled single pass SHG crystal (and prism pair) with no circulation

@Zenodilodon

7 ай бұрын

Correct on both counts. This comment has been pinned!

@snoopingas7554

4 ай бұрын

Same thing buddy. You are not that smart

@mjgd7624

4 ай бұрын

@@snoopingas7554 yeah, it’s not though. A diode pumped solid state laser, requires a diode to be pumping a solid state laser. This is just a diode being frequency doubled. Still cool, but not a diode pumped solid state laser.

0:37 I had to wipe down a spray of coffee from my monitor thanks to that. Fascinating, as usual. I'm slowly learning to live vicariously through watching others play with their toys. Thanks.

@Zenodilodon

2 жыл бұрын

My work here is done. :P

Just what I needed this morning, a great laser video by Zen, the laser wizard.👏 40 years ago, I tried pushing 5 watts into a 90 micron quartz fiber with a parabolic refractive index (to focus the beam into the middle, instead of reflecting off the outer wall). I stuck a lens onto the end of a glass tube filled with clear glycerol, which had ~ the same refractive index as the quartz fiber and lens. So, there was no problem with losses due to fiber cleavage nor internal surface reflections. Of course, the assembly had to be mounted vertically to avoid glycerol spillage. But, that provided a mirror for beam alignment. Didn't have any micro- manipulators, so I used a collet from the inside of a mechanical pencil to hold and focus the end of the fiber. Worked great on the input, as long as everything was perfectly aligned. Otherwise, the 5 watt argon beam would heat one side of the fiber's cladding , cause it to expand, bend, and bake. The main problem was recollimation at the output end of the fiber, because a parabolic refractive fiber has no specific focal distance (well du~uh). IOW, it was like a permanent beam brush effect, which your Pangolin/Kvant fans might appreciate. Missed your videos full of the wonderfully unique banter that only you can produce, Zen. Hope your repair business is doing great, but not overwhelming you. BR 😎

I use to build these lasers as a laser technician in Carlsbad, CA. That's my writing on the top label... I'm pretty sure that laser failed QC but we needed the PPLN Waveguide for a different unit. Precision optical stages were used to position all the components before being glued in place. I probably built several hundred of them. Good job on the overview.

@Zenodilodon

6 ай бұрын

These Lasers when working are fantastic and hold well against OPSL units. They are really difficult to work on though and I certainly can't fix them by hand. I am in the middle of making a precise optical positioner so I can work on these units and others. Another commenter who made these said there was a high fail rate when doing final testing on them. Nobody seemed to of liked working on these units and yet they seem to have some nostalgia as you're the second engineer to common on these. I don't think another Laser model has seen that sort of attention.

20 mins of Zeno. Just what I needed 😎😎 awesome...

Was able to get a working Melles Griot 35-IMA-830-012 Argon last year for under $100. Around 30mW @ 488.

@Zenodilodon

2 жыл бұрын

Nice! Argon ion lasers are really fun toys.

Video super! You, like me, were fully stocked with modules

@Zenodilodon

2 жыл бұрын

Fully stocked indeed, I am going to need taller ceilings!

this laser is absolutely beautiful! nice job on the video too!

@Zenodilodon

Жыл бұрын

This laser is still one of my favorite in the collection I have. The beam is astonishingly crisp, even compared to the Sapphire 488nm OPSL it still easily holds it's own. I did pick up another one since making this video, looks to have a trashed pump laser diode. I do have new 976nm fiber coupled pumps though I need a micromanipulator to position it.

The wizard at work great vid lildude!

lol the smoke hahaha you are so underrated... Educational and funny as always bud

Hello all, during the creation process of another video I have found an error in the schematic show at 20:10. The correction should be pin 2 of the LM385 connecting to the emitter of the D882 and not the base ( goofed up outer pins on the transistor ). Better Laser driver schematics are in the video linked below which will also help you out. kzread.info/dash/bejne/iZVrr86qmbXKpJc.html Apologies!

18:40 wow those gold bonding wires to the thermo-electric cooler are thick ! Some good gold retrieval here if nothing else left to do with it.

@Zenodilodon

2 жыл бұрын

Yeah they are. I bet they have copper along with the gold in those wire. They are much stiffer than gold alone, but I did not see any copper cross section when a cut the wire on one of them. I have been saving dead laser diodes because I do want to do a gold extraction one day at least for the fun of it.

@tradrudeboy

2 жыл бұрын

@@Zenodilodon When you do, what are the chances you'll talk like an old timey prospector?

0:30 LMAO.... omg.. I about pissed myself laughing so hard

loving the content.. but need more :)

Man, I haven't been watching your stuff recently, I stopped playing with lasers (I'm actually into flashlight modding), and now I started doing stuff with vcsels and accidently stumbled onto some of your old videos and I watched your videos - basically non-stop - FOR DAYS! You're definitely the most awesome laser nerd and absolute no1 when it comes to explaining how stuff works. Well, when you want to ;D I love you man! I wish I was gay...

@Zenodilodon

2 жыл бұрын

You don't have to be gay to share my fondness for rainbows. Heck I'm not and I will still spend all day with a room full of guys discussing rainbows. It's an optical thing! I am very glad to hear you have enjoyed my content, working with lighting and lasers is my passion and I want to help others further their abilities and passions. Stay tuned for more, there are many more lasers and optical devices to come!

Beautiful mate and I bet the component in front of the LD was a photo diode to measure output?👍👍

@Zenodilodon

2 жыл бұрын

Not sure. I tried to see if it was light sensitive and it was not The ends are conductive alone like a wire would be, but if I put one probe on the gold and one on the top of the black area it tests short one way and low has a 1.2 ish v drop the other way. I have no clue what it is at all given that result.

Just got one of those lasers with the controller for 50 €. Really nice stuff :). BTW, there's a sticker on the controller board, claiming that the serial number of the laser head must match the one of the controller. Maybe you can read both via the RS232 port and check if they match? If the don't, you could try to read the EEPROM content, change the number and write it back :).

@Zenodilodon

2 жыл бұрын

Usually they mark that because the controller is set to a specific current and temp setting, but to my knowledge the controller will physically try to run a laser, if the serial numbers don't match you risk destroying the pump diode and having improper temperature set points. My other MG drivers will all read the same laser head which is a 1123nm unit which also lends me to think the IC would not indefinitely lock out a laser head. You could be correct. Personally, I don't know much about using the serial port, to be honest I don't really care either in some aspects because I can at this point make my own driver and TEC controllers faster than trying to even figure out the command crap. I am a hardware person!

@christopherleubner6633

Жыл бұрын

Damn and i thought cars depreciated 😲 Laser stuff has extreme depreciation from what i've seen. Fwiw the driver alone is worth it.

I like the introduction! 🤣 All four drivers didn't work? Howwww did someone mess them up so badly, or do you think there is a single component failure/manufacture defect? Why is the fiber so long, feels like they'd cost less to make if they didn't contain 90 miles of thread 😂 Is their full name French or only griot? 🧐

Oh boy!!!😁👍🤘

I wonder what's the purpose of using such a long coil of fiber optic cable? Are these resonate tuned for a specific frequency of light by length?

@Zenodilodon

2 жыл бұрын

The fiber optic comes that long from the LD manufacturer, it's just far easier to coil it up than it is to cleave and remount the fiber optic end in a ceramic plug.

The blue epoxy can be removed using a drop of methylene chloride and time to let it soften it. Then use a fine tip soldering iron to melt it enough to let go. Be very careful not to touch the crystal itself. Put a dot on top of the crystal to indicate top and side closest to the OC as the poling depth is extremely shallow. Also these things work quite well with generic 9xx telecom pump diodes. Just use a TEC to control the temp of the crystal to match the input wavelength. They have a working input range of 989 to 914nm so you can get from teal to indego output. The catch is that the fiber output beam needs to be gausian as possible 🤓

@Zenodilodon

Жыл бұрын

That's the tip of the day on that epoxy. it's tough stuff and attack wouldn't even touch it. About the use of telecom diodes, yeah anything single mode and able to be fiber launched should work. I was considering the Nd line of 946nm would also be perfect. I also have a 530nm PPLN I want to play with pulled from a PL530 OPSL it would be fun to see what can be done with that too. I'd love to start getting into setting up multi-pump wavelength configurations and really start taking a practical spin at doing more with 3 harmonic susceptible crystals. The laser stuff just never ends!

I have a 488 nm cyan laser pointer.

Where do I go to purchase wizard hair?!

Hi zen, we have a similar laser which is not working anymore and keep beeping. could you help us fix it. of course, we will pay you any resonable price you asked

@Zenodilodon

Жыл бұрын

Beeping, I didn't even know they where capable of beeping lol. Are you using the laser driver made for the laser that has the same error LEDs as shown in the video? If so can you tell me which code is being flashed.

@qingkanglv9359

Жыл бұрын

@@Zenodilodon thanks for your reply. i checked the laser again. it seems the laser is ok. but the laser controller is not working. do you sell the laser controller? if not, could you tell me where i can buy one? thanks very much.

@Zenodilodon

Жыл бұрын

@@qingkanglv9359 It's not as simple as a controller swap. The Current of the pump and temperature of the XTAL/pump also needs to be configured to the laser head. This will need to be done if you get another controller. Here is a link for one. www.ebay.com/itm/123687943598?hash=item1ccc603dae:g:zecAAOSw~-ZciAuH&amdata=enc%3AAQAHAAAAsLaOnOpdjhMVx4Y3TKk2jC0Fpdu%2BtvVRA01Mft%2Bq6qbH%2FwE%2BMoFqwQd%2BCb1ja0mulPWseLmz%2FPvAgglk9a%2BtPFsbBk7AkndM83yRxUNCOm7ehKZ325a1xUYvLiFZbbTAqgZJ9xuKoSS4uA3bETdo1zvvuA7iGF91cpj604QQuvegzKcKotPqCbZrYR6dt18rd2R6wQha%2Fs4LXD%2F7iO6VdlwrxSrDzUwQx%2BvH5scrEXE%2F%7Ctkp%3ABk9SR_Lv9aP-YA

@qingkanglv9359

Жыл бұрын

@@Zenodilodon thanks very much. our laser is Melles Griot 85-BCD serial. do you think the controller is compatible? the link you shared seems good.

@Zenodilodon

Жыл бұрын

@@qingkanglv9359 The controller I linked is also serial. I do not know the commands, I personally only know the physical hardware and work on that. If you send me an email Zenodilodon@gmail.com I can send to you the information I have on the laser which may have more information.

Hi, I have a bit better equipped lab. I may try to align the lasers you have not working or at least rebuild them in free space (we have few thorlabs micromanipulators). I'd start by cutting and fusing the broken fiber for higher pump power.

@Minecraftmigapiku

Жыл бұрын

And we'd be specially I tested in periodically polled crystals from broken lasers

@Zenodilodon

Жыл бұрын

@@Minecraftmigapiku I need a micromanipulator badly! I have the full intend of rebuilding the dad ones into SFD based yellows. I already have new pumps, and crystals for 565 and 575 that work by being pumped by 976nm. It just needs to be assembled. This is an educational channel and I enjoy doing the work a lot. Currently I am in the process of putting together a micromanipulator, but also I don't have the free time for projects like I used to. It's a tough one but I would certainly like to build them myself, as it's where I get my kicks. If you have any tips please do share. Or mail a micromanuipulator to me lol :P

@Minecraftmigapiku

Жыл бұрын

@@Zenodilodon SFP yellow lasers rule! How you'll find time for it soon eonugh and show it off,

Hey zeno! I have a ophir LPM head i bought on ebay, and sadly I donèt know how to connect it. There are no markings on the connector. It is a 5 pin connector. Would you be able to help me? Seems like ive wasted $150 down the drain. I dont know of anyone else better that could help me on this :P I have a coherent head and that one is clearly marked and even has easily accessible information online. The ohpir head... not so much!

@Zenodilodon

2 жыл бұрын

Sure, send over pictures and the model number if you can to my e-mail address Zenodilodon@gmail.com

@Deadwindshadow

2 жыл бұрын

@@Zenodilodon thank you very much ! It has been sent a few days ago, hope you got it :) I appreciate your help. Keep the amazing content coming!

@Zenodilodon

2 жыл бұрын

@@Deadwindshadow Yes, I did get your e-mail. I have just been very busy this last week. I tried to find the pinout but no luck. I think my shop mate might know more but he has been out of town. I should be able to talk to him in the next day or 2 when he arrives back and he can also take a look at it.

@Deadwindshadow

2 жыл бұрын

@@Zenodilodon dont ever stop being so kind... we need more of that nowadays 😀 thanks so much. Im trying to start a laser business and need to measure my lasers before shipping them off and Id like two thermopiles to agree with eachother. Would it be possible to ship you a laser or LPM for you to calibrate? At my expense of course :) You can reply by email if you wish. Good day.

I use to work there building these. The yield was HORRIBLE, maybe 30% passed final testing. We had HORRIBLE sales people who would lie to the customers and sell marginal shit anyway.

@Zenodilodon

8 ай бұрын

On neat! I recently picked up another one to work on with a bad pump diode. These lasers gave me a solid challenge and it was enjoyable. 30% passed, ooph! I heard a similar situation with NovaLux and the Protera line of Lasers ( I'll be doing a video on those eventually ). They may seem marginal, but there is certainly skill put into them and it's admired. So you made the one that still does 60mw right? lol.