Is it possible to change the laser color without buying a new doide?

[laserpointersarecool]

Like with colored glass or something like that.

 

[Unown (WILD)]

No

 

[Encap]

Light has the physical property of frequency/wavelength.
Color is a function of the human visual system, and is not a physical property of lasers.
Lasers don't "have" color. Color exists only in the mind of the beholder.

 

[squish]

Technically yes it is possible to get different coloured light out of a laser device, but you are not changing the color of the diode. This process is called DPSSL. They usually use a high powered 808nm IR pump diode for this process, so unless you have a diode of this wavelength and the means to build a DPSSL, you can't change the color of your laser.

Due to how inefficient this process is, you usually need very high power diodes just to get 1mw of light output. For example, the process to get 473nm cyan light is about 5% efficient best case scenario. So you'd need an IR laser with about 100mw to produce 5mw of cyan light.

It'd be cheaper to just buy a new diode, these days you can pick up a 1-5w blue for less then 30usd. (Not that I'm reccomending you get such a high power laser)

I'd reccomend getting unique colors in low power so you can actually enjoy the beam without the risk of eye injury.

Explanation on DPSSL if you are interested, this is how most of these unique colors are generated such as cyan and yellow:
Its how 99% of 532nm green lasers work, it uses a high power 808nm IR laser to pump an Nd:YAG crystal (neodymium-doped yttrium aluminum garnet, not entirely sure how this works on a molecular level but this explains what these crystals are wikipedia.org/wiki/Nd:YAG_laser). This then produces 1064nm light which then frequency doubled (Which half's the wavelength) by using a KTP crystal (wikipedia.org/wiki/Potassium_titanyl_phosphate). Hence getting 532nm in the final result. This is how pretty much all green lasers are made, its very inefficient (20-35%) which is why green lasers are usually much less powerful then other colored direct diode lasers. Along with the crystals damaging a lot faster at higher powers.

This process can also create 473nm blue / cyan light (One of my fav laser colors) but is only 3-5% efficient.

And it can also be used for 593.5nm yellow light using a much more complicated process that still only yields less then 1% efficiency.

wikipedia.org/wiki/Diode-pumped_solid-state_laser
You'll find more information on this process on here if you're actually interested in laser technology and how they work.

 

[kecked]

For practical purposes the answer is no with one exception. Break it in half and it will be a black laser. Seriously thou. The nature of a laser is such that it emits a single or close to single wavelength. That’s part f it’s special abilities. Thus if you tried to filter it you’d see nothing at all unless at that one wavelength. Yes there are some odd balls and yes gas lasers do put out multiple wavelengths but for diode no go. Need to find a different diode that does what you want.

 

[dubious speculation]

Stick your pp in liquid nitrogen. It will shrink and so does a laser diodes wavelength when cooled.