Got this nice laser yesterday in the mail. Messed around with it. But then I misplaced it.
Searched it till a few hours ago within the 50m² where me and my gal livin. Found it today - it was in the freezer.
Guess I wanted to test if I can see a lower wavelength when totally cooled down.
Glad the laser was working after that without any problems




~Pics do the rest of the job... enjoy~









Comparison next to a 42mW 685nm and a 50mW 650nm




Comparison next to a 4mW 635nm (Atlasnova)






Strange changing output, looks a bit like mode shifting to me we know from DPSS lasers. Also see vid attached.






Random pics










Thanks Jordan

Awesome you got that one quick. Very strange on the output could the diode window be loose?

Guess this is the case here. It rattles when I shake it. Is there a way for me to repair it? Otherwise I´m just gonna live with it.

Nice red build

DTR is the MAN!

Other than decanning the diode not that I can think of. I have seen similar effects as shown in your video on a 405 build I had and it was a loose diode window then.

He is!

I like the red WL, my favorite red is 685nm.

Hope to get one with >500mW in a few years

Very strange that the output changes. Is this a sanyo? The output also seems elliptical. The diode I had was nearly perfect gaussian.

Guess the problem is the one DTR described in post #5 above. Luckily it doesn´t influence the " small point output" in any way.

lol in the freezer...

I like mine very much The color is just amazing nice especially next to a ~655nm it looks very orangish. If I got enough money I'd buy also a 671nm like the one Aryntha has. 671 dpss must look so develish red and that combined with the thin beam...
and also it's a little brighter than 685 ^^

Higher powered 685nm MUST come soon. I really like this very comfortable red.

But it's diode? or am I wrong?
I just like dpss more because of the beam specs..
and why must high power come soon? Is there a new projector?

It´s a diode, that´s right. But the beam specs and the output are very clean and good!

No new projector or something else (not afaik ) - I just hope to see a higher powered 685nm in the near future.

I dont think you will really. Most new visible diodes are going to come from projectors and 685nm is very inefficient for a projector because it will require much much more output to achieve visibility than say a 635nm.

At least I hope we see someone combining more than 5 of them to a single beam. A bit of fog/steam/smoke always helps.

is the color different from 658nm? I have heard that anything beyond 650nm is for all observable purposes visually the same color just dimmer.

I have a 685nm diode that I need to get lasing one of these days.

I think you can still differ the colors
For example as Aryntha described with his 671nm differs from a 655nm
or a high powered 808nm...
You can still see a very dim dot from that WL and it looks like purple with almost no more red in it

It´s definitely a optical noticable different wavelength.

Here is a quick comparison, gonna also add 650-660nm sometime.

Red wavelength comparison (ADD YOURS)


For your 685nm, make it lasing, you won´t regret it

Interesting. I will have to get mine going and see for myself.