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Wow guys, I just stumble across this video. Looks to be a 12X that's pushing out over a Watt. That must be a burning beast!
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Wow guys, I just stumble across this video. Looks to be a 12X that's pushing out over a Watt. That must be a burning beast!
I won´t trust "Arenared" and his kenometer setup
In my experience with PHR's, the longer wavelength is more noticeable when not pushed!
I don't know if anybody else has ever noticed this, but it seems like if you keep it at 100mW's or so, you will get more 'long wavelength' builds!
I would really love to get my hands on a spectrometer.
These diodes blue shift with increasing current density, resulting in lower wavelength emission as you increase drive current. Congratulations, you deduced one of the big issues still being researched constantly with semiconductor light emitters, especially these violet laser diodes that are being grown on c-plane polar GaN and need very high current density.
Going to non-polar or semi-polar will reduce this current-induced blue shift, but this is still a ways from production, and may actually never happen for violet lasers, while it's much for likely for blue and almost guaranteed for green lasers.
I pushed a 12X over a watt 7 times for under 10 seconds a while back and I posted the results.
Good Luck -- Fun while it lasts. What current are you running?
HMike
These diodes blue shift with increasing current density, resulting in lower wavelength emission as you increase drive current. Congratulations, you deduced one of the big issues still being researched constantly with semiconductor light emitters, especially these violet laser diodes that are being grown on c-plane polar GaN and need very high current density.
Going to non-polar or semi-polar will reduce this current-induced blue shift, but this is still a ways from production, and may actually never happen for violet lasers, while it's much for likely for blue and almost guaranteed for green lasers.
I pushed a 12X over a watt 7 times for under 10 seconds about a month ago and I posted the sad results.
Good Luck -- Fun while it lasts. What current is he running?
HMike
IIRC when Arenared was here under one of his other names and posted about this laser, he said he was running it at 600mA
Peace,
dave
I just found the posting again. I did not remember correctly. He says he was running it at 800mA
Peace,
dave