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How do yellow lasers work?

mfo

mfo

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rhd said:
You could certainly be correct - this is all a bunch of speculation. But I can still remember (vividly) looking at $300 green lasers and thinking "oh my god, who would ever spend that much on a laser (haha), will that ever be something I can afford?"

And I'm sure that back then (it's really not THAT long ago) the concept of 532nm DPSS seemed pretty tough, especially to make portable. But progress is progress.

Maybe a more interesting question is what do you think will happen first? A yellow DPSS for under $50, or an alternate source of yellow, made into a portable?
Click to expand...

I remember back in 1998, I saw a 5mW green for $499.99.
 





JLSE

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mfo said:
I remember back in 1998, I saw a 5mW green for $499.99.
Click to expand...

In 2001 I got mine for 350$ US.. 7mW from z-bolt :san:


Trevor said:
Display is our next best source. But... why use yellow when a larger range of colors can be made with R/G? Again... that's out.


-Trevor
Click to expand...


Its been done once to up the competition, dont see why it may
not in laser projectors in the next 5 years..

Wishful thinking if you'd like :drool:

"This year, the Aquos LED LCD TV series is touting an impressive 1.6-inch
thin frame, Energy Start Version 4 compliancy, and four primary color technology"

Sharp debuts 60-inch 240Hz Aquos LED LCD TV, 68-inch set with a touch of yellow in its RGB -- Engadget
 
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Trevor

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JLSE

JLSE

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Trevor said:
I stand corrected!

-Trevor
Click to expand...

You sound surprised :na: :poke:

*EDIT*
I would put a guess on deeper UV and anything that will serve
purpose in a companies marketing for future colours, with
entertainment technology being the deciding factor..
 
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HIMNL9

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Well, LOL about the "4 primary colors" TV ..... especially considering that yellow is not a "primary" color, technically speaking :p :D

Anyway, as far as i remember, all the chinese "red and green" pens was only 2 independent lasers in a single package, not a "combined" yellow beam (i can be wrong, anyway, i don't know all their products) .....

I think a pocket-size one must be easy enough, to obtain (not pen-sized, probably, but maybe in a small box) ..... uhm ..... it's an intriguing idea ..... i think in the next days i may have something to experiment, time permitting :eg:
 
aryntha

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Wow. HIML9 -- Had to +1 you as well, (really) for showing me a technology that I didn't even know about. I wasn't even aware that watchmaking had progressed that much... Looking at those videos, I'm thinking to myself: "Wow, Humans made these?!" ... I can't even begin to think how that would go from concept to reality.

Also, Trevor, thanks for shedding some light on how 589 vs 593 DPSS works... Wasn't sure of the frequencies; Apparently there's *some* way to do 589 with some wavelength of a blue pump diode... Came across a paper on that a few years back. I wonder if it's simpler. (I'm guessing not or CNI would have gone that way.)

I know I've seen yellow (581?) out of ArKr lasers... Wish I could get my hands on one of those. I think Rob from Australia here has one. And even for a gas laser, I believe it's touchy.
 
BShanahan14rulz

BShanahan14rulz

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I reckon if 589nm is used to excite sodium molecules in the upper atmosphere to create a virtual "star" for computers to use to adjust for visibility (like, star flicker), why can't they be used to excite sodium molecules in the lab? And I always figure being excited is better than being dull...

Oh, may I link dump? http://www.youtube.com/watch?v=wFpeM3fxJoQ#t=158s

You can watch the whole thing if you want, but I think there is only a few seconds of 589 action.
 
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yobresal

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Hi there guys, Which pump diode is used in a 589nm handhelp. 1W 1064?
 
piferal

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yobresal said:
Hi there guys, Which pump diode is used in a 589nm handhelp. 1W 1064?
Click to expand...

You need a 808 infrared laser diode.

A 808nm pump diode is used to generate 1,064nm and 1,319nm, which are summed in parallel to to have the final 589nm

For the diode power necessary, I can say is that the efficiency of this system is approximately 2 ~ 3%

With that, it "easier" make an approximate calculation of the power required for achieve an output desired, "in theory" :)
 
R

robertkoa

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rhd said:
In all fairness, the OP did ask how many "years". So it's actually a decently realistic perspective he has. It will be "years", but I bet that before 2015 we'll see a yellow for under $50.

That said, technology changes so quickly these days that I wouldn't totally rule out a yellow diode by that point. That said, there's very little legitimate mainstream need for a yellow diode.

Although, there was also very little legitimate need for Furbys, but science still made em.
Click to expand...

So you're saying or were saying since this thread is months old that the Mainstream does NOT recognize my need to play around with an 8mw yellow and project it onto the walls etc. ?!

Hard to believe.....
 
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