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At beginning I found that was my eyes unable to deal with 405 nm :o :o But if you look carefully near the laser spot at 4-5 m leaving the laser ON, the spot is surrounded by a very large sphere of scattered light composed of interference figure(like thousands of blue-black point). This happens...

I have already linked the diode to a simple driver with LM317 which delivers 45 mA...so about 16 mW I suppose. The diode works, the light is very nice(first time I see it)and at night you can see a "moonlight" colored beam! (and is quite hot to the skin) The real problem is the collimation: I...

Finally my BR diode has arrived! Unfortunately the seller did not include some informations or datasheet, so I would know if this ps3 diode(18mW) are all equal and require about 45 mA to get full power... Tomorrow I'll try with an LM317 configuration with 28 Ohm resistor. Here the diode...

I'm interested above all in the physical- chemical process which make a laser works. I love also any visual effect of the visible lasers(my wish is to collect every lasers visible wavelenghts ::) ). Last but not least, the effects of high pulse power in a small point(in future I'll try to add a...

I have an He-Ne laser that emits at 632.8 nm and is very similar to 650 nm diode in color. You have to shine them at the same time to a white object to take the differences. 632 is a bit brighter in respect to the power

Here a video of my laser pointer with this diode... now I have 2 other diodes left for others(and I hope better :-/ )projects. http://www.youtube.com/watch?v=VxT2R9o1ed8

The strange thing is that the snow seems to be fluorescent at this wavelenght :o , but I think that was only a camera effect as you stated.

I've made a new video of my burning red pointer. link: http://www.youtube.com/watch?v=VxT2R9o1ed8

Thanks... this means that I'll be careful with the current.. ;)

I ordered them some month ago from a korean seller on ebay. Initially he called these diode " slv1236" but on the datasheet included is written "slv1236-jl54" (not 1239). I think that this diodes are very resistant. Once by a distraction I linked one to 4,5 v battery(for few seconds) without any...

Just for this reason I chose the 18 mW, he says that comes from a PS3.

What are the differences between the old and new diodes? I have 3 diodes "JL-54 ", I have mounted one of them in a died green laser pointer with nice results, but seems that a CR2 battery it is not enough, and the output is quite weak. Later I'll build a better driver with LM317...I want to run...

One can use CO2 (that's relatively inert) for this purpose. If you don't want to burn anything inside a closed jar, you can make a reaction bethween CaCO3(or CaHCO3-sodium bicarbonate) and HCl(or other strong acid) to make pure CO2 which can be used to fill the jar with a small tube.

and this is a photo ;) http://www.newport.com/images/web250w-EN/images/297.jpg

My girlfriend is indifferent to my laser hobby, :-/ ; Differently my mother was scared until I completely succeed in healing my angiomas on the skin with my green laser ;D ;D ...from that moment she want use this technology to beauty concerning questions :o :o

Incandescence can always appear, but in this case I think that the oxygen is involved because the power is too low to make a such brighter incandescence without the helping of combustion. I would try but for now I don't have any usable lenses :-/

140 mW 808 nm from aixiz laser: http://www.youtube.com/watch?v=kDOUPBHk1c8 Nitrogen TEA laser, 1 Hz pulsed(note that the camera frames often skip some pulse): http://www.youtube.com/watch?v=o-2rp60mXi8 Nd:YAG laser, 1 joule (not measured)...

This "flash" of light is a very simple phenomenon! you can obtain this with all high power laser, when they are focused to a spot that it's near to the wavelenght of the laser. The light actually is white/yellow and caused by the over-heating of the material hitted by laser: as example if you...

Ok thanks! The fact is that I'm new on the forum and I don't have idea of what/who are GB, DDL or "the group" :-/

In particular, one of this is kripton laser, but very expensive.