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

Help buying first blue laser!!

Joined
Feb 4, 2010
Messages
3,282
Points
113
Wavelength will usually shift up with power and heat but a lot of it is from luck of the draw - no two diodes are exactly alike. Some will be more efficient, some less. Some bluer, some greener. Some will have multiple dominant wavelengths. Some can be driven harder, others less so. All diodes have these slight variances, color is just more noticeable for these since our eyes pick up the changes more easily in this part of the spectrum... So much so that a 4nm difference is pretty noticeable.

Also, the pocket is somewhere between the diameter of a AA and AAA battery. What is pictured above is definitely not a pocket unless those are some tiny, tiny hands.
 





Tyetan

New member
Joined
Mar 24, 2020
Messages
9
Points
3
Ok thanks for the info guys. I was really more curious as francis from sanwu said that anything over 90mw and the wavelength would be over 490nm.

He said he does have a 80mw 487nm available, would the beam etc be significantly more visible etc between say a 80mw and a 120-130mw?

Oh and dylan, is that with a 3 element or a g2? Maybe thats where the increase is found?
 
Joined
Sep 20, 2013
Messages
17,630
Points
113
Ok thanks for the info guys. I was really more curious as francis from sanwu said that anything over 90mw and the wavelength would be over 490nm.

He said he does have a 80mw 487nm available, would the beam etc be significantly more visible etc between say a 80mw and a 120-130mw?

Oh and dylan, is that with a 3 element or a g2? Maybe thats where the increase is found?
I've binned a lot of these diodes by wavelength. They tend to shift more with heat than power. If they are adequately heat sunk they should be fairly stable as far as their wavelength goes. You may see a slight difference in brightness between 80 mW and 120 mW at this WL, but not much.
 
Joined
Dec 15, 2014
Messages
6,787
Points
113
Ok thanks for the info guys. I was really more curious as francis from sanwu said that anything over 90mw and the wavelength would be over 490nm.

He said he does have a 80mw 487nm available, would the beam etc be significantly more visible etc between say a 80mw and a 120-130mw?

Oh and dylan, is that with a 3 element or a g2? Maybe thats where the increase is found?

Hi, T..
Paul has binned countless numbers of diodes here at LPF for members. I think your best bet is buy a diode and send it to him to bin. But all diodes are different in efficiency . Is a luck of the draw so to so nothing is etched in stone in the diode world.. Binned and spectoed is a plus if your that serious about WL's output.
Rich:)
 

Tyetan

New member
Joined
Mar 24, 2020
Messages
9
Points
3
Thanks for the replies. I did a bit more research and they only have 60mw 488nm in the pocket but have 150mw listed in the guardian so might be as the above explained and bigger host better heat displacement so able to drive more power without wavelength shift. Not that i really know what im talking about lol but im grateful for everyones answers
 
Joined
Sep 20, 2013
Messages
17,630
Points
113
I would be happy to measure the wavelength of any laser for members here. You only need to pay for shipping both ways. Can also measure the power too.
 
Joined
Dec 2, 2008
Messages
342
Points
28
question 1. what does mean bin?? binned ??

question 2. when you are reffering to "shift" of 488nm diodes with heat and current do you refer to wawelenght/color, or it is also changing shape as "mod hopping" in green lasers ?

thanx
 
Joined
Sep 20, 2013
Messages
17,630
Points
113
question 1. what does mean bin?? binned ??

question 2. when you are reffering to "shift" of 488nm diodes with heat and current do you refer to wawelenght/color, or it is also changing shape as "mod hopping" in green lasers ?

thanx

Laser diodes are generally binned by wavelength and also by output power. A shift refers to the wavelength increasing or deceasing according to some change in the diode's heat, current or some other parameter. Hope that helps.
 




Top