1.8W 445nm Diodes
1.8W M140 A-Type 445nm Diodes
This is a 5.6mm diode
Status: Out of Production
First Ship: Jul 2011
Last Ship: Apr 2015
Out of Stock/Very low chance of finding a new diode just used ones pulled from EOL projectors being sold as new which please note the current suggestions if followed with used diodes leads to a lot of immediate failures.
These are the lower bin diodes out of the M140 projectors without the dot above the bar code which average 1.8W. Most sellers don't bother sorting these and selling them separately instead just sell all the diodes as 2W M140's leaving the buyer in a luck of the draw as to if they will receive an actual 2W+ M140 or a lower bin 1.8W diode. I don't want to call these A140 diodes as most the diodes sold as A140's elsewhere are from heavily used A140 projectors. The A140 projector has been discontinued for about 3 years now and there is no way to get a new one just used ones and these are out of new machines.
Check out these threads for information on these diodes
If this is your first laser build here is a great place to start.
The, "I want to build a laser", Thread
Diodes are current hungry and as they heat up their internal resistance is lowered causing them to want to draw more current. A "Real" Laser Driver is needed to properly drive the laser. For info on constant current laser drivers see this thread.
Laser Driver - It Can Be Done!
1.8W A-Type M140 445nm Laser Diode
This is 700mA it was just flashing between 6/7 at the time the picture was taken and I did not notice it.