Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

Buy Site Supporter Role (remove some ads) | LPF Donations

Links below open in new window

FrozenGate by Avery

White laser diodes?






Bearded_Galaxy said:
Is it possible to have a laser diode that emits white light, like we have LEDs that emit white light?
Click to expand...

It may be, but we don't have the technology yet ;)

Generally, laser devices are monochromatic...
There are a few that produce several wavelengths simultaneously like Argons (and other gas lasers) and that badass white-light super-continuum laser...

White light can only be created by several wavelengths combined (Red, Green, and blue usually).
In white LEDs, the light is actually a product of using a blue LED and a yellow phosphor. This combination of yellow and blue wavelengths is perceived as white.
 
Interesting. Is that then why some seem bluer and some seem yellower? More blue or more yellow phosphor?
 
Bearded_Galaxy said:
Interesting. Is that then why some seem bluer and some seem yellower? More blue or more yellow phosphor?
Click to expand...

Yep.

The tint of a white LED is very sensitive to the amount of yellow phosphor applied to the LED die. Manufacturing variances during production result in different tints along the blue-yellow axis.
 
It could be done with deveral dyes on one can, but it would have no practicality, and no use. It could not be focused very far, and would cost way more than its more effective counterpart - the LED.
 
A white laser "diode" would have to consist of at least three separate diodes of different colors, joined into one module by optics and casing. It would be expensive, and at the time, impractical.

Remember how lasers work- the length of each laser cavity is very precisely measured.

-Mark
 
There is a post here somewhere (I cant seem to find it now) that talks about a new white laser diode(I think) released at some technology fair in shenzhen china. If I remember correctly it was demonstrated as a "pointer".
 
rocketparrotlet said:
A white laser "diode" would have to consist of at least three separate diodes of different colors, joined into one module by optics and casing. It would be expensive, and at the time, impractical.

Remember how lasers work- the length of each laser cavity is very precisely measured.

-Mark
Click to expand...

This ^

Remember, white doesn't have a wavelength of its own.
 
You must log in or register to reply here.





Back
Top