Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers

LPF Donation via Stripe | LPF Donation - Other Methods

Links below open in new window

ArcticMyst Security by Avery

I thought lasers only were ONE wavelength? why is IR emitted?

Joined
Sep 29, 2013
Messages
97
Points
8
Excuse the dumb question.... but I thought lasers only emitted light in their ONE particular wavelength.... so WHY do I hear about various red/green/blue lasers containing INFRARED light as well???

Someone shine a beam on this please!!
 





djQUAN

0
Joined
May 27, 2013
Messages
1,154
Points
63
And you also have laser diodes with multiple dies inside each giving a different wavelength for a different purpose (ex: CD/DVD lasers which have both red and IR diodes in one case)
 
Joined
Sep 29, 2013
Messages
97
Points
8
I'm aware 532nm DPSS lasers are actually frequency doubled 1064nm IR so it makes sense if some leaks through... But what about red 632 and blue 405/445 lasers? I thought the emitted some IR too for some reason... Or am I mistaken?
 
Joined
Sep 5, 2013
Messages
8,549
Points
113
I'm aware 532nm DPSS lasers are actually frequency doubled 1064nm IR so it makes sense if some leaks through... But what about red 632 and blue 405/445 lasers? I thought the emitted some IR too for some reason... Or am I mistaken?

Those are just diodes, no crystals involved :san:
 
Joined
Feb 21, 2013
Messages
5,013
Points
0
MultiLine Argon, one beam, multiple lines of wavelengths until split

ArgonOutputLines2.jpg


23747d1255396370-important-fyi-your-buying-ur-first-argon-multiline-laser-bigeyes-001.jpg
 
Joined
Jan 14, 2011
Messages
424
Points
0
Do NOT forget, as noted by djQUAN, some older cd/dvd sleds have diode cans with two LASING elements (I.R & Red) for write (I.R.) & read (Red). few and far between, but they are out there.
 
Joined
Feb 4, 2010
Messages
3,278
Points
113
Or you can have a sample diode that spits out 476nm and 480nm from being overdriven like styropyro does :p

A few other sample diodes do this :shhh:
 




Top