What exactly does "near TEM00" mean (aka the mode and stability thread)

**ElektroFreak** · 10-07-2009, 16:49

I can't say I've ever seen a system use DPSS and AOMs together, but I've thought about it myself. There's a bit of loss involved with AOMs and I was thinking also of using galvo blanking. It's limited to TTL without getting too complicted but for a green-only beam show I don't think that's really a major problem.

Can't wait for some green diodes!!! I like DPSS because I'm fascinated by how they work, but I'm ready for all-diode RGB..

**sugeek** · 10-07-2009, 18:44

Originally Posted by ElektroFreak

I can't say I've ever seen a system use DPSS and AOMs together, but I've thought about it myself. There's a bit of loss involved with AOMs and I was thinking also of using galvo blanking. It's limited to TTL without getting too complicted but for a green-only beam show I don't think that's really a major problem.

Can't wait for some green diodes!!! I like DPSS because I'm fascinated by how they work, but I'm ready for all-diode RGB..

AOM's are used in DPSS lasers all the time for engraving etc... I actually have been looking at buying some to have around (make sure you get the driver to if you do so). But the real thing I want is going back to ion lasers, a PCAOM so you can make white light then get the colors you want. The issue with AOM's in general is the losses which occur. You could almost do a separate show with the waste beam... Mixedgas, Laserman532, or Laseronics can chime in about PCAOMs and correct things now.

-Adam

**mixedgas** · 10-07-2009, 18:58

Many pros use AOs on DPSS green. Gets rid of a lot of issues fast. And the loss is negligible with modern AOs. Makes blanking something like a verdi or mellenia childs play.

Steve

**Laserman532** · 10-07-2009, 21:24

if you start off with enough power...losses dont mean much

AO on good green...mo betta

**Laser Ben** · 10-07-2009, 21:28

Originally Posted by mixedgas

Many pros use AOs on DPSS green. Gets rid of a lot of issues fast. And the loss is negligible with modern AOs. Makes blanking something like a verdi or mellenia childs play.

Steve

Exactly! Coherent tells you to use a AOM on the Viper (Verdi w/o Etalon) because of the poor modulation quality.

**dave** · 10-07-2009, 21:37

Originally Posted by weartronics

I think the highest quality projectors run the DPSS modules CW, and modulate the output using an AOM. I've only heard about this anecdotally though. I would be very interested to hear if anybody knows of a specific company/projector that is doing this.

laser animation sollinger once did this with their high power greenies I believe

Thread: What exactly does "near TEM00" mean (aka the mode and stability thread)

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