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Old 01-05-2012, 03:57 PM #17
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Default Re: my dye laser project [ pic heavy ]

That's quite a big project you're starting, but definately interesting! What kind of pump laser do you have? You'll probably need a few watts to get above threshold. Does this laser use a dye jet or a cuvette?

Be careful with the dyes and their solutions, they can be quite toxic. Probably the main reason why I don't plan to get my dye laser running.


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Old 01-05-2012, 06:16 PM #18
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Default Re: my dye laser project [ pic heavy ]

Why do they use an argon to pump it at 514 and not a frequency doubled dpss?

Also, pics show a cuvette, right?
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Old 01-05-2012, 10:55 PM #19
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Default Re: my dye laser project [ pic heavy ]

Quote:
Originally Posted by Bluefan View Post
That's quite a big project you're starting, but definately interesting! What kind of pump laser do you have? You'll probably need a few watts to get above threshold. Does this laser use a dye jet or a cuvette?

Be careful with the dyes and their solutions, they can be quite toxic. Probably the main reason why I don't plan to get my dye laser running.
I will be using a 0.5W DPSS, not ideal but it will do for now (it's all i can afford). I will likely end up selling it and getting a higher power.

methanol - http://www.sciencelab.com/msds.php?msdsId=9927227

ethylene glycol - http://www.sciencelab.com/msds.php?msdsId=9927167

rhodamine 6g - http://www.sciencelab.com/msds.php?msdsId=9927579

yeah, all around nasty stuff.



Quote:
Originally Posted by BShanahan14rulz View Post
Why do they use an argon to pump it at 514 and not a frequency doubled dpss?

Also, pics show a cuvette, right?
This laser is 22 years old, DPSS was significantly less feasible then.
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Old 01-20-2012, 04:11 AM #20
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Default Re: my dye laser project [ pic heavy ]

A quick update:

I got my pump laser last Friday.



It's a 750mW, however the beam isn't perfect. The coherent rep i talked to said i could expect ~5% efficiency which is piss poor. I will probably end up selling it and getting a laser with some better beam specs down the road.



^my labby with some of Ash's portables
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Old 01-20-2012, 05:19 AM #21
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Default Re: my dye laser project [ pic heavy ]

Not a bad looking beam shot though. Just not tem00. Someone will take it off your hands.
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Old 01-20-2012, 11:20 AM #22
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Default Re: my dye laser project [ pic heavy ]

Beam quality is very important, with a good beam the efficiency will be far higher. But apparently dye laser also can have with a rather low threshold:
IEEE Xplore - Sign In
If diodes can pump one a mostly TEM00 DPSS will do even better. Of course not all dye lasers are created equal.
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Old 01-20-2012, 12:09 PM #23
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Default Re: my dye laser project [ pic heavy ]

This all looks like a lot of fun! I'v always been curious how these really worked....looking forward to a video. I'm also surprised that they are pumped by an Argon, for some reason I thought they would be pumped by a nitrogen laser.

Thanks for sharing and looking forward to more!
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Old 01-20-2012, 02:42 PM #24
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Default Re: my dye laser project [ pic heavy ]

For CW use they can be pumped by an argon laser or a 532nm DPSS. Pulsed dye lasers can be pumped by a flashlamp, nitrogen laser, doubled or tripled YAG. Lots of choices.
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Old 01-26-2012, 05:05 AM #25
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Default Re: my dye laser project [ pic heavy ]

Another update:

I took some power graphs

first 15 minutes:



A 10 minute graph after it had been on for some time:



After some warm up it does appear to be TEM00 though it has a parallel beam.
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Old 01-26-2012, 05:14 AM #26
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Default Re: my dye laser project [ pic heavy ]

Wow! That's pretty stable for a DPSS laser!
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Old 02-24-2012, 06:02 AM #27
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Default Re: my dye laser project [ pic heavy ]

A quick update:

I made my first attempt at running the laser.

I poured 750ml of ethylene glycol into the reservoir. After that, the reservoir promptly emptied all over the garage floor.



That part connects the reservoir to the pump motor. It was damaged in shipping and was just sitting in the pump socket.

I'll make a second attempt when the replacement parts arrive.
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Old 02-24-2012, 06:33 AM #28
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Default Re: my dye laser project [ pic heavy ]

Careful if you have any animals (pets) near by. EG tastes and smells sweet but is toxic unlike it's cousin propylene glycol.
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Old 02-24-2012, 03:05 PM #29
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Default Re: my dye laser project [ pic heavy ]

Thats a bummer, i hope you can get it all buttoned up, id love to see what this unit is capable of.
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Old 03-02-2012, 05:30 AM #30
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Default Re: my dye laser project [ pic heavy ]

I got the needed parts in the mail today.



Here is where the connector snapped.



I got the new hose in place.



And finally moved the utility module to better accommodate any unforeseen complications.



I'm getting more gloves tomorrow, then I'll make attempt #2.
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Old 03-03-2012, 05:00 AM #31
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Default Re: my dye laser project [ pic heavy ]

I have achieved yellow light!

Unfortunately this thing would still be more effective as a sieve and no lasing to report yet.

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Old 03-03-2012, 12:04 PM #32
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Default Re: my dye laser project [ pic heavy ]

How did you align the green laser? It should overlap with the cavity mode which requires a good and stable alignment.
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Highlights of my laser collection:
Big Sky Er:YAG - HP 8168D 1480-1570nm tunable laser source - Spectra Physics 3800 modelocked Nd:YAG - lots of IR diodes and bars - LPC-815 200mW 650nm - DL 6353TL 635nm 5mW - HP5501A stabilized HeNe - 2x Melles Griot 05-STP-910 stabilized HeNe - Spectra Physics 3500 Dye laser - REO 30536 543nm 2mW - Coherent DPY315-100 532nm 100mW SLM DPSS - Lexel 85 - 3x B&W tek 10mW 473nm - 445nm 3W Bluefan Sabre module - SF-AW210 150mW 405nm - DPSS inc 355nm 100mW Q-switched

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