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Thanks! It was difficult to get them, and I know my emmisions point sizes are still larger than reality, and I think the glass lens in front could be causing some optical artifacts. Do you have a good process to get the glass lens off without damaging the diode?

I didn't know they used ball lenses and fiber, that's pretty amazing. I didn't want to disassemble it to look, because someone glued the optics aligned so well. Everytime I use fiber optics with lasers, I'm lucky if I can get 50% of the beam power into the fiber. They must have a great trick...

Ive got one of the dual diode combined into a single beam cutting modules from NEJE. The beam isn't collimated but comes to a focus point about 15-20mm away from the final output lens. They did some optical tricks to get the output spot size really tiny for a long section in the focused area...

This is a 670nm single mode at lase threshold. That above diode is a 808nm single mode diode, and it has a relatively large emission area (its also possible Im being tricked by local reflections and the source point is smaller). This one is a 450nm single mode diode, that somehow got its...

With your guidance, I took new measurements with the diodes outputting. The 2.1um x 8.2um face area appeared to be the source of the 505nm emissions. Here is a 940nm SM diode which appears to have a larger emission area. Not certain my widths are correct here, it was difficult to...

That is amazing. I could try similar tests with the Lasence 571nm module and see if they behave similarly.

Wow! Thanks for the education crew, I will see if I can re-capture the emission area with an improved perspective.

This is a sharp 505nm single mode laser diode. I measured the emission surface area, and 3d scanned the emission surface depth relative to the top face of the metal can. I plan to make each post I make in this thread another laser diode with the same measurements taken. The tool Im using to do...

Very cheap to buy new dye for 594nm https://www.ebay.com/itm/203242241966?hash=item2f522e7fae:g:aWcAAOSw6vpf9~wq For me, dye is too wide of an output spectra.

Thank you for your hard work and sharing the results my friend. I may copy you, but try to put 4 arrays together.

I chatted with Lasence, because on Alibaba they have a dozen listings for 575nm lasers, but in the conversation they said due to customer complaints about power stability. I remember in this thread people mentioned the humidity stability issues of the doubler crystal(S).

Do you have advice on sourcing a low mW output 575nm laser my friend? I have a 571nm, and it looks dirty green to me rather than yellow.

Our RnD facility is in El Segundo CA, and we live in Manhattan beach CA. It would be an honor to have Singlemode visit us anytime! I will give him a ride in a Tesla Plaid Model S that will blow his mind. I would love his help setting up an array of very narrow spectrum observing spectrometers...

A few folks here mentioned to me shifting a laser output wavelength with a diffraction grating. It seemed too amazing to be possible, but it works! The magic is getting a setup reflecting a portion of the gratings reflection right back down the laser diode. Able to shift this 660nm single...

I'm very interested in these diodes if you still have any my friend.

Lots of power in a single mode diode. Good luck with the extractions!

The cup and insulation wadding was added because condensation and frost formed faster and harder than I expected for how dry of a day it was. I gotta see how to shrink the spectrometer plots, because I took streaming data logs of sweeping the temperature vs wavelengths between a couple of...

The dominant energy wavelength (in the multi-mode spectra) was 375nm, and it remained stable across a wide temperature range.

Nice paper and nice experiment Singlemode. I've got a few diodes in the 460-495nm range to measure nm/degC drift and share results when I get a few hour. Do you understand how the 375nm multi-mode LD had no shifting with temperature from -20degC to 60degC, aside from getting dim at 60degC and...

I am so grateful for you sharing this information Singlemode. 25 wavelengths of blue to green transition for $10k in diodes is a lot, but also priceless for experiments if they offer any output level with a stable-ish single mode or at least repeatable double mode power level. I would mount...