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Melles Griot 561nm Lab laser

Sigurthr

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That MG meter... man, your toys...
 



crazyspaz

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Yea, i think I am more impressed by your meter o_O how much did that set you back?
edit: see some on ebay for a few hundred. Not bad. Does yours only read up to 2W?
 
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ultimatekaiser

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yeah. they're normally about 500 bucks or so. I got mine for I think 400 or something new shape. often they don't come calibrated perfectly and with the filter, sometimes without a sensor, so double check.

I got it when the old lab closed down, so I took it with me to keep it from being trashed.

Mine is calibrated for up to 2W, but the sensor goes to 3W.
 
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ultimatekaiser

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Haven't had much chance to play with it again. Might try again Tuesday on my day off.
 

ultimatekaiser

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Ok, so I've played with it and I think it's a preset OEM controller, which is why I can't adjust the settings. But if I connect it and let it idle (laser off, but with power) for a long time, then turn it on, I get better performance. It becomes TEM00 and it's power climbs. I suspect that the target temps are set incorrectly (for another head), and the TECs run even when the laser is off, so I end up with a slightly pre-cooled cavity.

These heads are nice. Rock solid stable, and they have TEC ramping, which is nice to shorten the warmup time drastically, but still give it a nice slow start over a few seconds. It's very bright even during the day.
 
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Sigurthr

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So what does it level off to when you let the head run without pump power and then later turn on the pump?
 

Sigurthr

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That's not bad at all. If it were mine I'd probably crack it open and manually drive it though.
 
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What an interesting toy ;)

This is why we are friends, haha.

Interested in seeing where this goes. I am finally able to start my DPSS journey now :) Also, got some "dead" 473 heads from Sam on the way. I'll likely be in contact with you about them. Should be fun :)
 
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To clarify. I meant that we had similar interests. Not that we had toys. We like to tinker, and align things. Though maybe I am the latter.

'Nuff thread-jacking on my part :)

Enjoy the 561! Race to DIY 604/607? ;)
 

ultimatekaiser

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Indeed. I know how to do the 607 process, but finding parts would be a challenge. I'm on Skype a lot so anyone wanting to chat, that's the best way to get ahold of me. As for driving the head manually, I could, but I don't need to open it to do that. I'd just have to identify the pin out on the head. But I see no need to. It's enough power for me. I have a bigger project taking off in the form of a new white light laser.
 

ultimatekaiser

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It's just like yours actually. A melles griot 643-75 RYB deciding the best way to power it.
 




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