Osram PL530 530nm laser diodes tested @75mw SLM

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Expand view Topic review: Osram PL530 530nm laser diodes tested @75mw SLM

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by Tio » Thu Feb 09, 2023 2:35 am

Do you still sell those?

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by bostjan » Wed Jul 14, 2021 8:23 pm

Oh wow, that's cool!

How do you filter out all of the iodine (fluorescence) resonance peaks?

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by soda » Wed Jul 14, 2021 9:58 am

Hi all,
Recently my friend have ordered few PCBs for PL530 drivers. If all went well, soon will be available latest version, improved by soft start, integrated TEC PID driver and feature connector for external monitoring and controlling of the parameters. Complete PL530 lasers will come later, after extensive tests of new design.
I'm dealing with new extension of the PL530 project: I2 stabilized OPSL, which improve the stability to new level. Sample of the beam is diverted through iodine vapor cell to lock it to an iodine absorption line to achieve absolute stability.
Attachments
Iodine crystals and fluorescence of the iodine vapors visible inside quartz cell. Beam splitters on the left of the image and the PL530 module is overexposed by scattered light.
Iodine crystals and fluorescence of the iodine vapors visible inside quartz cell. Beam splitters on the left of the image and the PL530 module is overexposed by scattered light.
PL530I2.jpg (349.48 KiB) Viewed 22171 times

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by bostjan » Fri Jul 09, 2021 2:30 pm

Hi,

Sorry for the newbie old thread bump, but I'm looking for a PL530 with a driver. I'm sure all of these are gone by now, but in case anyone wants to sell one, please contact me and let me know.

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by Loic74 » Wed Apr 21, 2021 2:01 am

holomaker wrote: ↑Mon Apr 19, 2021 5:41 pm Remember these green lasers were in production for only a short period of time, and then quickly replaced w direct (easy to modulate) green diodes ....
Interesting, I did not realize that

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by holomaker » Mon Apr 19, 2021 5:41 pm

Remember these green lasers were in production for only a short period of time, and then quickly replaced w direct (easy to modulate) green diodes ....

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by Loic74 » Mon Apr 19, 2021 7:41 am

Thank you @Soda and @Holomaker,

I am surprized a regular diode could not be modulated fast enough for pico-displays. What's more, losing single longitudinal mode would probably be a bonus in case of a pico-projector since they get into large efforts to despeckle the images. But I am probably missing something obvious.

Anyhow, I am happy to help assemble some drivers if that is an option, @Soda I sent you a PM

Cheers
Loic

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by holomaker » Mon Apr 19, 2021 6:17 am

One of the reasons for all the technology in the 530, was so it could be modulated quicker than conventional DPSS configuration. As of Now I’ve not tested for SLM while modulated, the initial IR output at the diode is quite narrow frequency to begin ..(distributing feedback Laser using a Holographic grading in the laser cavity)..

Re: Osram PL530 530nm laser diodes tested @75mw SLM

by soda » Sun Apr 18, 2021 4:41 am

Hi Loic,
Very interesting idea, by my knowledge, the red and blue diodes cannot be modulated without lost of coherence. The green OPSL module is different kind of animal and I suppose that it's quite possible to modulate it without lost of SLM, but coherence should be somewhat reduced, mainly due to variation in thermal load.
Currently I have not the drivers, I m looking for someone who can assemble it, due to lack of the time. Anyway, I can help you with modification of the design to allow the modulation.

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