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Weird PHR laser

Glutton

Glutton

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So today I built my first laser and after killing my XBOX 360 HD DVD player diode, then ordering a new PHR sled it feels AWESOME having accomplished this. Thank you DRlava, stonetek and jayrob for supplies and thanks to this entire forum for all the great laser knowledge posted here. Ok, to the point, my PHR laser has a very bright violet dot but there is a second dot right outside of the main dot that contains all the colors of the rainbow (ROYGBIV). Has anyone seen this before or is just my eyes? Maybe a fluke prism effect? Its kinda cool!

Thanks
Jesse (newcomer)
 





J

jeffd

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Hmm i never heard of that before. Can you take a pic?

And i cant stop watching your avatar.
 
Mrcrouse

Mrcrouse

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That is very interesting, I have never heard of the before either. Also, your avatar is like hyptnotizing. I find myself just staring at it! It's pretty sweet!
 
Glutton

Glutton

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jeffd said:
Hmm i never heard of that before. Can you take a pic?

And i cant stop watching your avatar.
Click to expand...

I will try to get a pic up tomorrow when I have a camera. I do wear glasses but my girlfriend sees the same thing I do and she does not wear glasses, so thats ruled out.
 
J

jeffd

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Haha wow you must not like your girlfriend very much if you wear the glasses and she takes the eye abuse:crackup:
 
Glutton

Glutton

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jeffd said:
Haha wow you must not like your girlfriend very much if you wear the glasses and she takes the eye abuse:crackup:
Click to expand...

Ha ha, well I dont have "blueblockers" yet, just corrective glasses. We both took eye abuse but I was shining it outside a good distance away. Yes I am still waiting on several pairs of safety glasses.
 
yobresal

yobresal

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This is common with PHR diodes, more specifically those that have suffered some kind of damage and especially those that have suffered catastrophic failure. Neat effect, especially in a dark dark room.
 
Glutton

Glutton

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yobresal said:
This is common with PHR diodes, more specifically those that have suffered some kind of damage and especially those that have suffered catastrophic failure. Neat effect, especially in a dark dark room.
Click to expand...

Damn, major buzz kill. You think its gonna die on me soon? I was really rough with it and couldn't believe it actually worked in the first place. Oh well I still got a few sleds left to mess with.
 
Crossfire

Crossfire

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yobresal said:
This is common with PHR diodes, more specifically those that have suffered some kind of damage and especially those that have suffered catastrophic failure. Neat effect, especially in a dark dark room.
Click to expand...

My PHR laser has that sort of effect, but it's more like a blotch or scatter rather than a dot, separate from the main dot. I thought it was something fluorescing in the diode.

Otherwise it seems efficient - I get 97mW from 90mA current with a 405-G-1 lens.
 
yobresal

yobresal

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I have the effect with one of my strongest PHR diodes. Try to focus your blotch to a spot. It focuses seperately from the violet. You can get it focused but it is not laser light. It diverges much like a focus LED would. Start out up close and then work your way back while focussing.
 
styropyro

styropyro

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This usually happens with violet laser diodes that have been damaged in some way. One of my first ps3 builds had this artifact, it lasted for months until I lost it. :D
 
matrixcs

matrixcs

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I got a situation like this, Im using a driver similar to o-like (405nm driver) current is set to 100mA. the first day i installed the PHR(extracted carefully) it worked and then the driver is being powered via 3.7V CR123a, it worked fine for the first 3 days, then early this morning, first it emmitted a bright beam, then after i switched it off, and have it rested for a while when i turned it on the beam goes dim and im seing a White-Yellowish rectangle thing on the dot of it...

At first i thought its the driver so i checked, the driver is fine, then the battery is fine too..i tried a new battery still nothing...

its still emmiting a low beam but one thing i found out...
the diodes temparature rises so quickly...

what do you think?? is the PHR dying??
 
styropyro

styropyro

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Dead laser diodes usually still emit a little bit of light, that's why we call it the LED effect.
 
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