Hello, I have heard about a project going on at Hong Kong University. Supposedly they are using coherent white light laser diodes. Has any one heard of such a thing? Wouldn't a white light diode require a red blue and green diode? How would those 3 diodes be coherent? Is there something that can be done externaly to increase coherence length? THANKS!
David - Thu, Jan 25, 01 07:47:33 PM
> How would those 3 diodes be coherent?
Colin - Tue, Feb 13, 01 10:17:13 AM
As long as each color diode is coherent with it's self it should work. I have read about labs using three exposures at three wavelengths to make true color holograms. In the Handbook of Holography there is a diagram of a method to take three laser beams and stack them into the same space using beam splitters to make a single exposure of three wavelengths. What you end up with is really three holograms exposed on the same plate superimposed on each other. 206.81.100.122
Jie Cui - Thu, Nov 01, 01 08:13:04 PM
I know there is a company under TOyota who do the white laser using GaN related materials, by using three quantum wells in one chip that are lighting at different wavelength (three colors), one can get a white laser. This results may already published in Canada two years ago.
posted at 17:11PM, West time. Nov.1, 2001. by