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



question about voltage for 405nm pointers

mathyou9

Member
Joined
Aug 2, 2007
Messages
38
Points
8
eBay user heruursciences sells these 405nm modules quite often. My first observation is, his units take a AAA battery.

I'm just wondering what he has done exactly to work down the voltage on these diodes. It seems that most 405nm modules use substantially more voltage than 1.5V My first guess is that he is simply using less voltage but he specifically states "E2-Li not recommended" I assume because the higher voltage.

Anyone care to enlighten me? Thanks
 



Switch

New member
Joined
Dec 9, 2007
Messages
3,327
Points
0
Laser Diode: GaAlInN, MQW gain guided, multi mode

Lasing wavelength: 404-407nm, 405nm typical (Royal purple-Violet Color)

Optical power throughput: 3 to 5mW

Est. Diode Lifetime: 20,000 hours at 5mW

Focus: Fixed at infinity, collimated

Operating voltage: 1.5V

Operating current draw: 180-200mA
I dont think these are the ps3 blu-ray diodes :-/
 

chimo

New member
Joined
Jun 20, 2007
Messages
650
Points
0
These are Bluray.

The Dorcy flashlight he has the LD in has a voltage boost circuit. If a 1.7V (E2) battery is used as a source, the voltage will boost too high and the LD will run at too high of a current.
 

Cyparagon

Well-known member
Joined
Sep 12, 2007
Messages
9,837
Points
113
I bought one of those a while back. He claimed 5mW output, but I read 100µW. I took it apart and it turned out the diode was dead. He used whatever driver was in the thing that previously drove the LED. It obviously didn't work too well. :-/
 

Switch

New member
Joined
Dec 9, 2007
Messages
3,327
Points
0
But are the standard blu-ray reader diodes everyone uses multimode like he states on his description? :-/
 

MarioMaster

Well-known member
Joined
Jul 27, 2007
Messages
3,642
Points
63
Switch said:
But are the standard blu-ray reader diodes everyone uses multimode like he states on his description? :-/

hmm that's strange, i'm pretty sure they are single mode, and i have one of the flashlights it does have a booster circuit inside it
 




Top