Green Diode not only emitting green

[Wolfman29]

This is really neat! Glad to see some real science getting some results!

 

[offroadfreak8582]

Awesome man! This was the PL520 from my GB right? Pretty neat :beer: @ mariomaster great findings

 

[ZRaffleticket]

Yep, this is from the GB

 

[Marco Polo]

The orange/yellow colors are likely due to fluorescence, and can be observed using 532nm as well as 520nm. Organic oils (e.g. olive, vegetable, kerosene) tend to show an orange or yellow fluorescence to the naked eye, which appears red with anti-green safety glasses.

Try aiming at random things. If you aim a green laser at a yellow hi-liter cap, the cap with fluoresce bright yellow. Certain orange and red plastics and/or food dyes fluoresce as well. Sometimes things light up when you don't expect them to, it can be interesting.

 

[BShanahan14rulz]

While MM's results above don't rule out plastic or glass fluorescence, but coupled with the shape of the output of ~595.5nm, they do still make a strong case for the light source being the laser diode junction itself, rather than an accidental pumped glass laser.

But thanks, actually, for bumping this thread, I hadn't seen it yet. Always fun to see these weird questions and then some really good theories and data to support them.

 

[MarioMaster]

While MM's results above don't rule out plastic or glass fluorescence, but coupled with the shape of the output of ~595.5nm, they do still make a strong case for the light source being the laser diode junction itself, rather than an accidental pumped glass laser.

But thanks, actually, for bumping this thread, I hadn't seen it yet. Always fun to see these weird questions and then some really good theories and data to support them.

I would think if it were the diode window or glass lens fluorescing it would be in a different focal plane and as such you wouldn't get a focused dot.

If it were something in the spectrometer fluorescing (which there shouldn't be by design) then the intensity of the orange light would be reduced instead of amplified when I used the green blocking goggles.