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Why would you solder with a laser ? :)

The wavelength is probably in the deep Infra Red region. 808nm + About the power,well at least 30W.

Pozdrav iz Srbije! :beer:

Do i need to post the exact same photo hakzaw did? We have killed so many diodes during tests,so we know what are we talking about. Trial and error my friend :) How about a photo of your setup? And a photo of your DMM. You must think this trough. Diode requires somewhere between 2.2-3v and lest...

Always put diodes in a heat sink. It doesn't matter that you don't feel it instantly,but they are heating up,a specially at 250mA. Big IR diodes run on 20c,if you go beyond that temperature they loose power and die. Laser diodes are very sensitive optoelectronic components. I see that you are a...

DVD burners have diodes that output almost 200mW ,readers on the other hand output 10-20mW. I suggest you do more research on how diodes work. If you have a LM317 driver,monitor the current,don't go over 400mA for 650nm and 300mA for 780-808nm. That way it will always work,if it dies again,its...

Hammer fixes everything :D I don't know about coating,but honestly,its not that important if used only for experiments. Buying adequate lenses and modules is always the way to go. :beer:

The lens is secured by a plastic black ring(its on the picture). U just unscrewed it with a screwdriver. The plastic is very weak so it tends to break if you force it. The metal holder part came of easy, it was secured via some kind of glue. :)

Depends on what would you like to engrave. I used 660nm an 808nm because i had no other choice. If i had a choice...445nm or 405nm. They are cheap and have a lot of power. If you want to experiment,you can use any DVD/CD burner. There are some open cans diodes out there,they seem to be the most...

I have built a CNC engraving machine that is used to custom etch chips. It is capable of some sick precision. I cant give you info on the CNC mechanics but i can tell you what you want to know. The lens form a laser printer is really good! I used a DVD RW diode and printers optics. It's darn...

It can work that way,for a couple of seconds at most before the semiconductor melts. I have tested that my self. That's is not the way to drive diodes,so never do that again. It also depends on the power supply. If you have a cheap supply,expect a lot of problems that can kill your diode. The...

Hmm. I might not understand you or you don't understand how laser diodes work(don't find this offensive). LD behaves like a zener diode. The difference is LDs are much more sensitive. Most IR diodes work on 2.2v. So if you give it 5 volt and there is no voltage drop due to no sinking resistor or...

5V directly to the diode?

Also,there is a specific threshold voltage/current for the diode. So its not that suspicious that there is a weak output from 200mW driver. It might require more than your giving it.

Your phone camera has a IR filter. Hope you have some protection glasses, even 100mW of IR is really dangerous,imagine 5000mW... Its not going to heat up anything cause there is no focus,or the material is transparent to 808nm. The diode looks fine in the video. I don't know much how faulty...

Are they mosfets or bipolar? Anyhow,if you have a DMM,you can measure the voltage on Gate/Base to see if there is anything there. Also,i would recommend getting them out and testing them on diode test. If they are fine,than its probably the drive/feedback circuit.

Shorting them,no. I i don't think that the problem is in the output transistors. I think that circuitry that drives them is faulty or it has no feedback. You might have unhooked something. How about some pictures? Maybe its something simple... Good thing is that its not the diode. For future...

The circuit that drives the pump diode is faulty. Sounds like a ground problem,or current feedback. If you don't know basic electronics,it will be impossible for you to solve this. :)

True! My mistake!

You seem to not have the basic knowledge,and yet playing with dangerous diodes. I suggest you do a little research instead of burning diodes and others stuff. People here can tell you there experience and a bit of knowledge,but they will not teach you basics. So,you want to drive your diode at...