Hypothetical white light diode

[absolom7691]

Curious if there are any single-can multi-chip (rgb) diodes out there. Not sure about the feasibility of this but couldn't three chips be stacked to use the same broadband resonator optics and therefor produce "white" light with the red, blue, and green all having the same divergence and perfect alignment, similar to stacking an argon and krypton tube and lasing through both bores? I'm interested to know how difficult it would be to align three diode chips when we're talking sub 5µm emitter sizes (not for me but for LD producers). OSRAM? Oclaro? Nichia? You guys listening?? lol

Can you tell how much I hate aligning my projector and miss the simplicity of a mixed-gas or AR/KR setup with a perfect white-light beam? Also, imagine how simple and how small an optical deck would be in a projector!

[mixedgas]

problem is the die-air interface IS the output coupler, and some of these have stacked strained quantum well layers for tuning/HR mirror etc. Might be possible but would require a MAJOR research effort to do so, probably easier to put combining optics into the housing at a micro scale.

You need some one far more skilled then me to comment.

Also modern dies push the energy density limit, so...

Steve

[absolom7691]

problem is the die-air interface IS the output coupler, and some of these have stacked strained quantum well layers for tuning/HR mirror etc. Might be possible but would require a MAJOR research effort to do so, probably easier to put combining optics into the housing at a micro scale.

You need some one far more skilled then me to comment.

Also modern dies push the energy density limit, so...

Steve

Thanks, Steve! I can always count on you to pop my balloon with sound science! lol. I figured it was probably not feasible or not practical, otherwise LD manufacturers would probably be doing it. I would imagine such a diode would be great for miniaturizing light engines for all kinds of products.

Oh well, back to my kinematics!