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Prism to change color of green or violet laser

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jared1983

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I'm looking for a prism which could change the color of my green or violet laser. I saw a video online with what I believe was a 405 violet laser passing through a prism and a yellow and magenta beam came out. I don't know. Any help would be appreciated. Thanks
 





jared1983 said:
I'm looking for a prism which could change the color of my green or violet laser. I saw a video online with what I believe was a 405 violet laser passing through a prism and a yellow and magenta beam came out. I don't know. Any help would be appreciated. Thanks
Click to expand...

Unless it was a multi-wavelength gas laser, your memory of it is incorrect or the person who posted it is BS'ing the public.

One of the characteristics of diode lasers (and laser light in general) is that it is monochromatic. That means that there is only ONE color present. Passing it through a prism will only turn the beam, NOT change the color

In addition, I don't know of anything that combines yellow and magenta in a multi-wavelength beam

Peace,
dave
 
Could you post a link of the video?

The laser was mostly likely flourescing in the material, making it look like it had changed color,
however as Dave said, the beam that would exit the material would still be the same as it went in.
 
Uhm, if you've seen a violet laser incoming a crystal, and a magenta (or yellow ?) beam coming out, all that what come in mind to me is that it was, probably, a PBS cube, and it was combining violet with a red beam (obtaining magenta), or a dichro combining violet with green (obtaining yellow) ..... not changing the color, combining 2 different colors for obtain a third one ..... am i correct, imagining this ?
 
Its possible to combine 2 beams with a prism - optics work both ways: prisms can split sunlight into many colors over various angels. If you send lightbeams in at those angels they will combine.

Its not the most practical way of color mixing though: since the angels are quite close to eachothers, you'd have to put the lasers at considerable distance to make a practical set up. Bluray and red are pretty far apart though, and the result could look magenta.

Other than that, a prism will not change the color of a beam. It may fluoresce green or yellow etc when a bluray beam passes through it, but what comes out is still 405.
 
I just found this and was interested to find out what it was.
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I did a little looking around and found some Very hardcore material(far past most of my own understanding)
Raman scattering - Wikipedia, the free encyclopedia

Did find one link that was somewhat easier read.
Stimulated Raman Scattering - a simple way to change the color of light

This is very interesting stuff and perhaps this should move to gas laser section, not sure. If anyone has experimented with this I would be interested in hearing about it.
If not I think at least the links should be a good read!
 
subscribing to this thread. Read the easier to understand one and I too am intrigued....
 
Raman scattering... sure, that will give you lower wavelength, but the output will not be a nice laser beam with low divergence etc. This should not be confused with a Raman laser, which is an actual laser, but afaik has only been demonstrated in the ifrared (1.5 um or so).
 
Benm said:
Raman scattering... sure, that will give you lower wavelength, but the output will not be a nice laser beam with low divergence etc. This should not be confused with a Raman laser, which is an actual laser, but afaik has only been demonstrated in the ifrared (1.5 um or so).
Click to expand...

There are visible raman lasers, in both gas and solid form. There is a 690 nm Raman line that shows up in HENEs. Details are in the FAQ for say 6 lines.

But I ain't talking about how or what on the solids, its a trade secret I intend to keep.

I would not buy the liquid shifter unless you have a Qswitched laser with at least a few watts.

CW liquid raman shifters do exist, but you need about 10 watts of green pump for a less then stellar output of a few tens of mW.

Steve
 
daguin said:
Unless it was a multi-wavelength gas laser, your memory of it is incorrect or the person who posted it is BS'ing the public.

One of the characteristics of diode lasers (and laser light in general) is that it is monochromatic. That means that there is only ONE color present. Passing it through a prism will only turn the beam, NOT change the color

In addition, I don't know of anything that combines yellow and magenta in a multi-wavelength beam

Peace,
dave
Click to expand...

Okay, physics question. I have a 405 nm violet laser pointer . Where the laser passes through a porro prism removed from some binoculars the laser appears more like green 532 nm or so.Where the laser emerges from the prism and where a stray ray of the laser hits some clear plastic containers the light appears to be violet again. With a green 532 nm laser everything is what I would expect, green.
https://www.facebook.com/photo.php?fbid=10201086411632605&set=pcb.10201086469714057&type=1&theater
 
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It might appear to change color In the prism, but I can assure you, the exiting light is still 405nm


Edit, spelling
 
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chipdouglas said:
It might appear to change color In the prism, but I can sure the exiting light is still 405nm
Click to expand...


He may also be dealing with some fluorescence in the glass of the prism.
The fluorescence would be a different color than the laser beam
The color WOULD NOT come from the laser light though
The "new" color would have been produced by the laser light exciting the electrons in the glass of the prism

Peace,
dave
 
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