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Jetlasers Pl-e Pro 532nm 300mW!! Cream Factor-10! *Pic-Heavy*

paul1598419

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Nice review, Av8tor. I was looking at the beam specs on the sheet you provided. 2 mrad is high for a quality 532nm laser at this power level. You might want to check into eBay for some of the lab lasers in this wavelength to be had in powers close to this one and higher. They have some that are quite good and very reasonable. If you are interested i could provide links for you. Thanks for sharing this. I can't rep you again so soon. :D
 

steve001

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I was looking at the beam specs on the sheet you provided. 2 mrad is high for a quality 532nm laser at this power level.
I wonder why. By using a longer focal length plano-convex lens the divergence can easily be lowered.
 

paul1598419

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I wonder why. By using a longer focal length plano-convex lens the divergence can easily be lowered.
Then why wasn't it? Sure the optics on these DPSS lasers can effect divergence, what about "near TEM00"? What does the qualifier "near" even mean?
 

steve001

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Then why wasn't it? Sure the optics on these DPSS lasers can effect divergence, what about "near TEM00"? What does the qualifier "near" even mean?
It don't know. I have a green laser from the now defunct company NovaLasers. I added a longer focal length pcx lens and got a lower divergence. Originally I believe the divergence was 1.2mrd.

About near tem00. I've looked around and cannot find any definition. For reference a true tem00 mode is round with a bell shaped power profile (gaussian). What I think is described by near tem00 is a beam mode with a profile that isn't perfectly round. It is still gaussian though.
 
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paul1598419

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Yes, I know very well what a TEM00 looks like and how the power curve behaves. I think the "near" TEM00 is a disclaimer for those who need it to be, so the manufacturer can't be held to account for lousy beam specs. Your original beam divergence of 1.2 mrad is not that bad to begin with. if you were able to improve that to 1 mrad that would be worth the effort IMO. But, one would hope the manufacturer would try to get the best divergence possible when the laser is supposed to be of high quality.
 

paul1598419

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Didn't really pay attention to the battery as he didn't show it, but looking at AW's complete inventory, it would seem they don't make a 26650, so I don't know what you got, but it aint that.
 

Radim

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Yes, I know very well what a TEM00 looks like and how the power curve behaves. I think the "near" TEM00 is a disclaimer for those who need it to be, so the manufacturer can't be held to account for lousy beam specs. Your original beam divergence of 1.2 mrad is not that bad to begin with. if you were able to improve that to 1 mrad that would be worth the effort IMO. But, one would hope the manufacturer would try to get the best divergence possible when the laser is supposed to be of high quality.
Paul, I think near TEM00 is something like mix of TEM01 for example and TEM00, where TEM00 is dominant - there is a slight decrease of intensity in the middle of beam. I did experiment with my Evo recently, where usually at TEM00 I discovered this as the conditions were out of optimum. I was not sure if it was some effect of projection surface, so I changed position and examined the beam and really - there was slight decrease even in beam, not only dot. The modes can switch rapidly and even go through some middle stages in DPSS.
Still my laser usually has at full power TEM00 - nice circular dot with gaussian intensity profile - just when it was warm enough it switched to this.

Check here the experiment: http://laserpointerforums.com/f48/radim-s-laser-painting-99824-8.html#post1478645

Edit: I would translate near TEM00 as TEM00 with occasional slight decrease of intensity in gaussian profile or not perfect gaussian profile.
 
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paul1598419

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Yes, if you look at the physics involved in TEM01, TEM10 or other modes you will see the parts of a Gaussian beam are actually out of phase with other parts of the beam. There are a whole set of equations to predict these types of mode incongruities. I have actually been studying them recently. There are many reasons a DPSS laser might do this, including changes in temperature of the pump diode(s) and/or the crystals. That is why lab lasers typically have better beam specs than pointers. My 1300+ mW labby has TEC temperature compensation of the pump diode and the Nd:YAG and KTP. It is fascinating to read the scientific papers on the design and and building of these kinds of lasers.
 

Radim

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I also do. :D The physics behind is so complex and fascinating. And of course entire design of cavity matters a lot in terms of what modes you might observe.
 

badboybilly

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Some really nice photos there, great quality laser and the divergence looks great in the pics! Awesome mate!
 

BowtieGuy

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In case someone caught on to the battery being used in the review
FYI https://www.e-cigarette-forum.com/forum/threads/aw-imr-26650-batteries-authentic-or-fake.605176/
Nice handheld though. Thanks for the beamshots.
Good catch dden, I didn't see that in the pics either, unless it has been edited.
AW hasn't used that black AW label for a couple of years, now they use the hologram label.

Here are a couple sites regarding legitimate AW batteries, and where to find them. The sites don't look like they've been updated for quite a while, but the info. should be helpful.

AW Batteries - Authorised Dealers
AW Batteries - Authorized Dealers - USA
 
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BowtieGuy

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All the time, wouldn't be without one; I'm a caffiene addict!
 




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