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Old 05-09-2016, 01:09 PM #1
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Default Got my 589nm laser! Dragonlasers 589nm 50mW

Hi everybody, today I got my 589nm laser. I saved the money quite a time ago for this laser, but I was thinking literally for years if I should get one or not.
I mean the wavelength is awesome, but the're quite expensive, but the wavelength is really awesome, but they tend to be quite unstable and mode hopping, but the wavelength is really really awesome. So I couldn't resist and got one. It is the Dragonlasers Spartan 50mW laser.

From order to arrival it took about two weeks. The laser came well packed. I saw the first time ever chinese handwriting on the invoice. Damn that looks pretty artistic.

The laser is build into those Spartan hosts which I like actually pretty much.
I really like the lens cap.
I have no possibility to do a LPM test unfortunetaly, but I've tried to compare it visualy to a laser with known power and I tested to burn some stuff. Using a lens black rubber starts to smoke instantly.
All in all I really like this laser. It is a bit unstable and mode hopping a bit but not nearly as strong as I expected it to.

EDIT: So I did some stability tests:
Temperature:
I tested it at 26C the first time. It is not really stable in output power and mode.
Mode hopping occurs quite often, the power is quite consistant for a minute. After this minute it
drops quite a lot (still smokes black plastic with lens). Then after another 30 seconds it gains in power
and stays in TEM00 really stable in mode and power at this time. I guess it is then over 30C.
A weired thing that happens only while switching it on while it is at about 20C to 22C is a short flicker
and quite aggressive mode hop. After those two seconds it continues to operate like at 26C.
I left it in the basement for an hour to let it cool down to 16C and tested it then. It was really stable
in mode and power. There was some small mod hopping and small power changes but it operated for
2 minutes really well. I did not got to the point where it dropped as hard as at 26C. It did not
flicker like on a start at 20C to 22C.

I tested different currents:
550mA - 700mA: The laser is really stable in mode (TEM00) and power at this point, the power is really low too.
800mA - 1000mA: The laser starts to mode hop at 800mA the power is still low. Increasing the power at this point
increases the output power a lot. The laser gets really bright at 1000mA and starts mod hopping as usual.

When not using a lens you won't notice those mode hops. While operating it at 16C for two minutes I could not
actually see a output power change. It sure did, but it is almost not noticeable. If I operate the laser at 26C I do realize
the drop in power after about 1minute and a few seconds and then how it again regains some power.

So here are a few pictures:

The host itself, like I said, it is quite simple:


Here I compare it with a green DPSS through a lens. It is rated 80mW but I got it measured and it was pretty acurately 85mW. So the output of 589nm is quite close I'd say. However I have to get it tested somewhen.


For the beamshots I used a shutter speed of 2 seconds.







There is a picture of the dot through a better lens. This thing looks like a indoor sun. I bet Solaire approves



Well, that's it. I really love this laser. Damn this wavelength is so ***y.


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Want to make a simple diffraction grating?
http://laserpointerforums.com/f49/di...tml#post952546

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Old 05-09-2016, 01:44 PM #2
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Congrats on saving up and welcome to the 589ers
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Old 05-09-2016, 02:00 PM #3
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Yes, congrats! Now you can spread some sunshine. "Praise the sun"
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Old 05-09-2016, 02:25 PM #4
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Thanks . I just quick measured the input current. It is using 1.66A. Somehow I have expected more.
Edit: The laser threshold is at about 0.55A.
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Old 05-09-2016, 04:26 PM #5
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Another member with a 589 now, sweet! There isn't a day where I turn mine on. Just firing it up and seeing that bright beam of sun is enough to turn everyone's mood if your having a bad day!

Don't ever get rid of it

-Alex
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Old 05-09-2016, 05:19 PM #6
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Awesome photos/images! Best of luck with it---your are correct, they tend to be a little bit more unstable than some DPSS lasers howerver is also correct that the wavelength achieved is worth it---589nm is a very appealing, unusual, and rare wavelength---enjoy it .

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Old 05-09-2016, 06:24 PM #7
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Quote:
Originally Posted by Hap View Post
Don't ever get rid of it
I really hope I never have to!

There's something I noticed after turning it on a few times. When I start the laser completely cool it is flickering for about one second. It is quite noticeable but dissappears right away. If I turn it on after it was operated and is still warm this does not happen. If I "preheat" it with my hands this problem does not occur either. So I think I is something heat related. Is this common?
Another thing I noticed, which is quite nice, is the dot afer about 30 or 40 seconds. When the laser gets warm the dot stays TEM00 and does not jump at all.
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Lasers:
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<1mW 337,1nm TEA-laser HOMEMADE!*click me HARD*
150mW 405nm RIP HOMEMADE!
500mW 405nm pen HOMEMADE!*click me HARD*
1000mW 445nm 3D Printed Host Build HOMEMADE! *click me HARD*
1000mW 447nm Dragonlasers Spartan
300mW 532nm Skylaser 517mW peak H532L-S300B skylaser
50mW 589nm Dragonlasers Spartan Variable Power Mod *click me HARD*

500mW 635nm HOMEMADE!*click me HARD*

My first tesla coil! : *click me HARD*
My first BIG one! : *click me HARDER*


Want to make a simple diffraction grating?
http://laserpointerforums.com/f49/di...tml#post952546
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Old 05-09-2016, 07:21 PM #8
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Quote:
Originally Posted by MrMcChicken View Post
I really hope I never have to!

There's something I noticed after turning it on a few times. When I start the laser completely cool it is flickering for about one second. It is quite noticeable but dissappears right away. If I turn it on after it was operated and is still warm this does not happen. If I "preheat" it with my hands this problem does not occur either. So I think I is something heat related. Is this common?
Another thing I noticed, which is quite nice, is the dot afer about 30 or 40 seconds. When the laser gets warm the dot stays TEM00 and does not jump at all.
Hmmmm I don't that such a occurrence with mine. Upon firing it up(wether it be run before or not) I get no flickering and a solid TEM00 dot unit around 1min when it starts to reach its duty cycle and dims down.

-Alex
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Old 05-09-2016, 08:10 PM #9
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Quote:
Originally Posted by Hap View Post
Hmmmm I don't that such a occurrence with mine. Upon firing it up(wether it be run before or not) I get no flickering and a solid TEM00 dot unit around 1min when it starts to reach its duty cycle and dims down.

-Alex
I did a quick video through a lens to show the dot.
Like you see it mode hops till about 1:15. Then it dims down quite much.
After another 30 seconds it gains brightness and the dot is a really nice TEM00 but it is not a bright as within the first minute. I still can get black plastic to smoke with the lens.
What do you think?

20160509_214721.mp4 - DirectUpload.net Cloud
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What I have to say first: Sorry for all mistakes I make. But I hope everyone understands my english, thank's
Lasers:
RGB Laser *click me HARD*
<1mW 337,1nm TEA-laser HOMEMADE!*click me HARD*
150mW 405nm RIP HOMEMADE!
500mW 405nm pen HOMEMADE!*click me HARD*
1000mW 445nm 3D Printed Host Build HOMEMADE! *click me HARD*
1000mW 447nm Dragonlasers Spartan
300mW 532nm Skylaser 517mW peak H532L-S300B skylaser
50mW 589nm Dragonlasers Spartan Variable Power Mod *click me HARD*

500mW 635nm HOMEMADE!*click me HARD*

My first tesla coil! : *click me HARD*
My first BIG one! : *click me HARDER*


Want to make a simple diffraction grating?
http://laserpointerforums.com/f49/di...tml#post952546
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Old 05-09-2016, 08:40 PM #10
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Quote:
Originally Posted by MrMcChicken View Post
I did a quick video through a lens to show the dot.
Like you see it mode hops till about 1:15. Then it dims down quite much.
After another 30 seconds it gains brightness and the dot is a really nice TEM00 but it is not a bright as within the first minute. I still can get black plastic to smoke with the lens.
What do you think?

20160509_214721.mp4 - DirectUpload.net Cloud
Well the duty cycle on these Spartans is listed at 1 min. The fact yours mode hops during that entire duty cycle isn't right. You said after "pre-heating it" you don't have this problem? If so, your laser may like to run hot and that's it's preferred operating temperature.

Mine likes it cold. Try using it while warm and it won't nearly output as strongly as if you had it sit outside in 60 degree weather for a couple minutes. :P

-Alex
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Old 05-10-2016, 05:31 AM #11
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Here is a video of the flickering during a cold start

tmp_8177-20160510_071131720868235.mp4 - DirectUpload.net Cloud

I expexted some type of instability.
The mode hopping is only visible through the lens so I don't really care much. Within the first minute it is quite consistent in power output.
The preferred temperature seems so be quite high.
All in all I am happy with the laser, but can somebody confirm that the modhopping during warm up is normal if it is the case? I just want to make sure everyting is ok and it will work for some years.

Edit: Updated the first post with some information about stability.
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Old 05-10-2016, 03:41 PM #12
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Quote:
Originally Posted by MrMcChicken View Post
I did a quick video through a lens to show the dot.
Like you see it mode hops till about 1:15. Then it dims down quite much.
After another 30 seconds it gains brightness and the dot is a really nice TEM00 but it is not a bright as within the first minute. I still can get black plastic to smoke with the lens.
What do you think?

20160509_214721.mp4 - DirectUpload.net Cloud
Just mode hopping that's normal you should see my Protera as it warms up
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Old 05-10-2016, 06:18 PM #13
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

The thing that makes me a bit unsure is that the mode stabilizes after 1 minute ant 30 seconds which is after the duty cycle. I wonder how bad it is to stress the laser above the duty cycle.
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Old 05-10-2016, 06:24 PM #14
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Mine acts in a similar fashion. It performs best after around a minute of warmup time. Here's the graph
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Old 05-10-2016, 07:38 PM #15
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Nice review! I recently ordered a Spartan 589 myself. Did DL send you any e-mails along the way (tracking numbers, etc.) or was it just order-->wait-->arrival?
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Old 05-10-2016, 07:39 PM #16
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Default Re: Got my 589nm laser! Dragonlasers 589nm 50mW

Congrats! Yes the Spartan is a solid beautiful host I agree. I love my 589. It is truly my pride and joy. I got quite lucky with a very stable one and peaks close to 90mW. I have since also bought a 200mW 532nm Spartan because I love the host so much. Its also a great hand held. I wish I knew you were ordering one I would have suggested you buy a couple diffraction gratings from DL. They are loads and hours of fun.
Keep her safe and give her a name. A laser this beautiful needs a name lol.
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