Cheap 450nm laser - single mode?

[Atomicrox]

Do you guys think this is a PL450 or just an underpowered multi mode? I know that site isn't trustworthy and the laser is probably underspec but it'd still be a good deal for me if it's single mode.

Powerful 200 mw 450 nm Adjustable Focus Water Resistant Blue Laser Pointer (Black) with * Laser Pointer * Box * 18650 Battery - Free Shipping

 

[scumbagatheist]

By the look of those pics, I'd say A-140 or worse, multi-mode

 

[bloompyle]

That's EXACTLY what my single mode looks like unfocused. It's not like red diodes where, single mode, it's a perfect even circle of light. Same with the 520nm diodes, there's a brighter center part. Not full on multimode though.

Multimode unfocused will be a RECTANGLE with some spread around it. You'll know

I say this is a 450nm single mode laser.

Here's a pic of my 450nm's raw output:

 

[Speedy78]

Definitely looks single mode to me. Unless its ran at a lower current and the "multi-mode lines" are not visible to the camera yet. I'd bet single in Vegas though.

 

[norbyx]

For a single mode laser I think it is quite powerfull and cheap...

 

[Atomicrox]

Thanks guys, I was about to buy it but unfortunately the site doesn't take PP. Probably not worth the risk of paying with my card...

 

[Zathras]

deleted

 

[Atomicrox]

Just mailed them asking if paying by PP is possible. Thanks for the idea