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Nice! But sharp announced for the first quarter, to massproduce a 498nm Diode (yes ist super rare having the wavelength binned. And 80mW output on top!

Google for 497nm ecdl (Arxiv). They have the simplest design ever and still running at NASA/JPL. Singlemode

If your cavity is 100mm long, then your fsr is 1.5GHz. not 10GHz. This is easily detectable by a standard pd with a bias and an RF amp.

Sorry, after beeing a long time a scielent reader, I have to put my 50¢. By posting a how to build an ecdl was done 10000 times. Better than you could here. No results so far, but a lot to say. Modulating the laser within the cavity will give you the most side peaks at the FSR, but this is not...

I have too a bunch of binned ones from the first batch ( look into my thread about binning them and also the selling thread). I can get 497-502 directly from sharps factory (I posted their stock list in the removed channel some time ago). Best Singlemode

Nice from you. Lasers as intertaiment for a new laser fan is high priority. Nope, every bit added to this forum is additional information. Insightful or not depends on the contact Nope Of course there is no problem with a personal opinion. This statement makes every content here completely...

So what's the insight here? You can make perfect fringes with a lightbulb ( double slit experiment ) Congratulations to your long experience, but I don't see any additional information here ( The fringes look very nice though) Singlemode

This is why cyl lenses are used for astigmatism correction. Same divergence for every distance Singlemode

Coherent beam combining if they are single mode in frequency works like a charm. Singlemode

There are some cool applications, especially LIDAR (less background at 690nm from the sun than at lower WL) and blood flow monitoring through the skin. No idea how big this is compared to other applications but I bet 20$ that if some reseller buys 10k pcs. of these, the price will be much lower...

Ok, if you count some batches that were not hitting the target wl and somehow showed up somewhere, then you are right. These were a lucky draw for us. If there would be more demand for them, they would be now offered officially. Nichia has these WL as a stock item since years (and the price...

What diode got more expensive with time? PS: https://www.aptechnologies.co.uk/home/news/news/qdl-685nm

Have 4x the 690nm diode. Nice beam and the price will definitely fall, since these ones are samples from the first batch. Who can wait a bit, should get them cheaper soon. Also 100mw ones from another company are sold as a tester, they are way more cheaper and show no kink up to ~ 200 mW output...

Have you contacted them about the beam expander? Singlemode

Your argument won't get better if you just say the opposite of mine. Think what you want about temperature and MTBF. Every diode laser textbook has an exponential relationship between temperature and MTBF. But by your standards it's not relevant, right? The data in the paper I posted is from my...

The PLT5 450B is speced for 100mW, the Nichia for 500mW. Overdriving one diode at 3x the rating (and hugely reducing the lifetime) and comparing it to a non overdrived one is like apple and oranges. The Nichia can output 1000mW without seeing even a sign of thermal roll over with proper a...

I have a few of them in my lab. As far as I know only Nichia sells these blue singlemode diodes speced for 500mW (I run them at 700mW with temperature stabilization now for more than half a year) for a bit more above than 2k $ per piece (got one engeenering sample from the first batch they sold...

Please provide more information, diode datasheet, your measurement or. s.e. Otherwise I can only say: Nothing to add here

What measurement with the 375nm are you referring to? Singlemode

And the heating will kill the diode pretty fast Feel free to stand to every point you like. I am not interested in calculating part costs etc...