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

What type this diode is?






Joined
Jan 29, 2014
Messages
12,031
Points
113
Well, you probably already know it is a infrared diode, the voltage, current and output power specs seem normal to me.
 
Joined
Jan 13, 2010
Messages
2,516
Points
63
Try asking the seller. I don't think anyone here could tell you "exactly" what you're buying unless you have a datasheet.
 
Joined
Feb 5, 2008
Messages
6,252
Points
83
Description given by seller said:
Typical operation voltage is 2.2V
Maximum operation voltage is 2.7V
.
Typical wavelength is 808nm
The wavelength ranges of these diodes are between 800 and 820nm
.
Typical operation current is 1.2A
Maximum operation current depends of the diode, the interval value is 1.2A - 1.6A

This looks normal to me. Why do you not trust it?
[FONT=&quot] [/FONT]
 

niiii

0
Joined
Jul 25, 2014
Messages
85
Points
8
Ive found some other diodes with different power that have same specs as this one. Ive asked the seller for the info but he told me the same answer as the description.
 
Joined
Jan 29, 2014
Messages
12,031
Points
113
From what I've seen, 808nm diodes are about 35-40 percent efficient, i.e. at 2.2 volts and 1 amp that should be close to 900mw, maybe the efficiency can be higher for some.

Perhaps the range of voltage and current are as wide as they are because he is selling slightly different diodes, or they vary by that much from unit to unit. I have to admit, those are some very wide differences and that would explain why you see some diodes which are specified within those voltage and current ranges to have much different output levels.

I don't know why the seller has specified such wide possible voltage and current ranges, ask him, it isn't common for a 808nm diode to require 2.7 volts but like I said, he might have mixed devices or lots which behave differently (or didn't know what they were doing when testing them and didn't account for the voltage drop from the power leads, or... knows others don't). Still, I'd expect he isn't misrepresenting anything and that those are indeed the differences which can happen from diode to diode that he sells. However, the lower voltage and current numbers he stated are completely normal for a 40% efficient 808nm diode.
 
Last edited:




Top