Are there diodes out that are 473nm "blue" yet?

[pullbangdead]

Diodes have been made in the entire wavelength range from below 380nm (UV) up to 531nm (very green).

Really!? I've never heard about most of these.
Does anyone on this forum have one of these diodes? (Except the Blu-ray)

Yep, really.

Blue has been around a few years. Only in the last year have the wavelengths been pushed up above 500nm, and only since last summer have the wavelengths been pushed up to green (520nm+). Sumitomo has published up to 531nm, Kaai 520nm+, OSRAM 515nm, Nichia 515nm, Rohm 500nm, etc.

Nobody on here has one in a pointer that I know of, but the group I work in makes these laser diodes, and I'm doing my Ph.D research in making them. We make lasers from violet through blue, and beyond: our highest published wavelength is at about 506nm (which is almost green, I'd say; it's a very pretty color, but it's hard to describe degrees of color like that). So I've made and handled them many times, but don't have any packaged up in a handheld or anything like that.

 

[LSRFAQ]

Yep, really.

Blue has been around a few years. Only in the last year have the wavelengths been pushed up above 500nm, and only since last summer have the wavelengths been pushed up to green (520nm+). Sumitomo has published up to 531nm, Kaai 520nm+, OSRAM 515nm, Nichia 515nm, Rohm 500nm, etc.


Rohm 1688$ for 50 mW production blue . Roughly 450 nm.

They announced 688$ and then pulled that quote and added 1K more to it at some point..

Nichia 1800-2400$ for 100-200 mW 440-445 nm production blue sample pricing.

I requested samples for my day job..No go, those devices are very much pay to play..

No price breaks until you are ordering 100s, so kiss that group buy is cheaper idea good bye. Having done business with Nichia on LEDs in the past, they stick with a corporate to corporate sales scheme and DO NOT allow resale of their parts direct to consumers..

Steve

 

[davidgdg]

Ultimately these things are driven by consumer demand; laser projectors and TVs in particular.

What I don't know is the extent to which those products will create demand for blue and green diodes as opposed to DPSS systems. My guess is that 532 DPSS is now so cheap and established that there won't be much incentive to research mass-market green diodes. Blue is another matter. 473 is still pricey and consumes a lot of power and the price advantage over native blue diodes is nothing like that for 532. Interestingly, Evans and Sutherland's laser projectors use 532 for the green but 461 (which I presume is a native blue diode) rather than 473 DPSS for the blue:
http://es.com/products/displays/ESLaser/resources/ESLP_Datasheet.pdf

 

[FireMyLaser]

Green and blue laser diodes will be far superior to DPSS in size, stability, speed and power consumption. Which is why the demand is great.

 

[HIMNL9]

Nobody on here has one in a pointer that I know of, but the group I work in makes these laser diodes, and I'm doing my Ph.D research in making them......

Then i guess you may be the first one having a 473nm pen-size pointer ..... :eg: :eg: :eg:

j/k :crackup: :beer: