5000mW 808nm C-Mount

billg519 said:

Here's a fairly simple and cheap solution, but needs lithium battery voltage to run. (4.2v) Get some DX flashlight regulators, these are a negative side regulator and are available in 350, 700, 1050, and 1400 ma sizes. These can be stacked to increase the current. The regulator stack in the attached photo  delivers about 5.5 amps. The photo shows how to stack them. The regulator stack is small, 5/8" diameter, 1/2" long.

Click to expand...

Midknight said:

What is the Threshold current though?

Click to expand...

billg519 said:

Kenom:

I used 2 x 25500 lithiums (in parallel) for the laser in the attached photo.
It is 960nm and puts out about 3.5 watts.
Battery life is not too bad so far.
Diode is c-mount, rated 4 watts, so diode life should be good.

Click to expand...

billg519 said:

Kenom:

I used 2 x 25500 lithiums (in parallel) for the laser in the attached photo.
It is 960nm and puts out about 3.5 watts.
Battery life is not too bad so far.
Diode is c-mount, rated 4 watts, so diode life should be good.

Click to expand...

billg519 said:

Midknight :

If 5250 ma is close enough, try the following. Get 3 x DX 1400ma flashlight current regulators, and also one 1050 ma. This adds up to 5250ma and will be a compact unit. Assemble the stack as in my photo in my earlier post above. These are great regulators because they are negative side regulators. C-mount diodes are usually positive ground devices, so a negative side regulator is convenient for ease of construction of the final unit. You seem to have a nice diode there. Should give you a great laser! This regulator would only require one D-cell lithium to run the laser.

Spyderz20x6 :

Believe it or not, this diode actually collimates, at close range for burning, with an Aixiz glass lens.
I simply put the lens in my own machined focussing assembly. I am making a twin for my 4 watt 960 nm handheld, this twin will be an 808 nm 4 watt. Machining and anodizing are completed, diode is in laser head and aligned, just need to complete assembly and test. These things burn stuff !
I can't wait to get going on my next project,[highlight]808 nm 20watt handheld.[/highlight]

Click to expand...

billg519 said:

Midknight :

If 5250 ma is close enough, try the following. Get 3 x DX 1400ma flashlight current regulators, and also one 1050 ma. This adds up to 5250ma and will be a compact unit. Assemble the stack as in my photo in my earlier post above. These are great regulators because they are negative side regulators. C-mount diodes are usually positive ground devices, so a negative side regulator is convenient for ease of construction of the final unit. You seem to have a nice diode there. Should give you a great laser! This regulator would only require one D-cell lithium to run the laser.

Spyderz20x6 :

Believe it or not, this diode actually collimates, at close range for burning, with an Aixiz glass lens.
I simply put the lens in my own machined focussing assembly. I am making a twin for my 4 watt 960 nm handheld, this twin will be an 808 nm 4 watt. Machining and anodizing are completed, diode is in laser head and aligned, just need to complete assembly and test. These things burn stuff !
I can't wait to get going on my next project, 808 nm 20watt handheld.

Click to expand...

HumanSymphony said:

[quote author=billg519 link=1219808788/20#23 date=1220664777]Midknight :

If 5250 ma is close enough, try the following. Get 3 x DX 1400ma flashlight current regulators, and also one 1050 ma. This adds up to 5250ma and will be a compact unit. Assemble the stack as in my photo in my earlier post above. These are great regulators because they are negative side regulators. C-mount diodes are usually positive ground devices, so a negative side regulator is convenient for ease of construction of the final unit. You seem to have a nice diode there. Should give you a great laser! This regulator would only require one D-cell lithium to run the laser.

Spyderz20x6 :

Believe it or not, this diode actually collimates, at close range for burning, with an Aixiz glass lens.
I simply put the lens in my own machined focussing assembly. I am making a twin for my 4 watt 960 nm handheld, this twin will be an 808 nm 4 watt. Machining and anodizing are completed, diode is in laser head and aligned, just need to complete assembly and test. These things burn stuff !
I can't wait to get going on my next project,[highlight]808 nm 20watt handheld.[/highlight]

Click to expand...

billg519 said:

jamilm9 - Yes, it would definitely fit in there! That is one big host with lots of battery capacity! Six D-cell lithiums in parallel would last at least a short while. I may, however, make my own host up from aluminum stack that I have on hand. Finished size will be around 2.5" diameter, 12'" long.

midknight - looking forward to seeing your 5 watt when it's going. The attached photo shows the very first IR build that I ever did, completed April 19, 2008, it is a 1 watt 808 nm 9mm closed can diode laser. I put the 9mm diode in an aixiz housing by drilling the diode hole bigger so the 9mm would fit on the end of the housing. The current regulator is in the gold colored heatsink cut from a piece of shower stall aluminum moulding. It used LM 350 in normal LM317 driver schematic. LM350 can take up to 3a. Batteries are 2 x 18650 lithium. Assembled with electrician's tape, this was a great prototype that was fun to fire up. Nothing fancy, it worked great. That diode is still in the aixiz housing, but now is in an aluminum host using a single 18650 to power it. Just redid it.

Click to expand...