Question about 612nm(true orange)

[thechosenone]

Why is 612nm(true orange) only possible in gas/hene laser form ?, I have always wanted to know why true orange(612nm) isn't possible in normal portable laser pen style form like other wavelengths are.

I am guessing it's because 612nm diodes don't exist, but why haven't any big companies created any 612nm diodes ?, is it impossible or is it due to lack of interest from the big companies due to the color not being needed.

I think it would be a fascinating color to have in a portable laser pen like we do with the many other wavelengths(532nm, 405nm, 473nm, 445nm, etc)

 

[anselm]

...due to lack of interest from the big companies due to the color not being needed...

There.
Main reason we get cheap reds and blurays is they are so widespread and massproduced
in optical drives. Same line of thought for the 445nm nichias.

 

[Meatball]

The man who invents the NEED for yellow/orange diodes in industry will be a very famous and heavily praised man on this forum.

 

[Benm]

Well, its not only a matter of need, but also technical difficulty.

There is clearly a market for true green laser diodes, and there are developments in that direction, but they aren't on the market yet.

Orange would probably be approached from the red end of the spectrum, and there are some diodes that produce wavelengths in the order of 620-625... but those are rare. In reality, even 635-640 nm diodes are usually multimode and rather expensive.

If you want an orange laser, its going to be 594 nm, dpss, and bloody expensive for now.