question about the ir diode...

ok, i don't know much about green lasers so.....

i took apart my 30mw green laser, and i'm assuming that it's just an IR diode in there, with some green.......thing.......... that makes it visible, so can i just swap out the IR diode to make it more powerful? or would that mess up whatever makes it visibly green?

Mohrenberg said:

ok, i don't know much about green lasers so.....

i took apart my 30mw green laser, and i'm assuming that it's just an IR diode in there, with some green.......thing.......... that makes it visible, so can i just swap out the IR diode to make it more powerful? or would that mess up whatever makes it visibly green?

Click to expand...

The crystals are usually fully saturated so the can't make any more green no matter how much IR you put in.

--hydro15

well first off the question is, is it s true green? with an IR filter? chances are its it is a true green w/ an ir filter, but i guess you never know until you prove it

it was listed at true green when i bought it,
it looks like a regular round diode and then i can see a little green spec of something mounted above it, if i turn it on and look at it from the side there a tiny dim light coming out of the diode and then it's green after it goes through this "spec"

i don't want to really make it brighter......just make it burn.....
i tried focusing it more and that didn't do the trick

You're not going to get any more power out of a True 30. As stated before, the crystals are almost always fully saturated at 30mW. There are exceptions, but they are not very common.

Also, if you were going to make it burning power, it would definitely be brighter, to the point where safety goggles would be required. Although...I guess you could take out the IR filter, which would make it a lot less safe, but quite possibly enable it to burn.

-Mark

rocketparrotlet said:

You're not going to get any more power out of a True 30. As stated before, the crystals are almost always fully saturated at 30mW. There are exceptions, but they are not very common.

Also, if you were going to make it burning power, it would definitely be brighter, to the point where safety goggles would be required. Although...I guess you could take out the IR filter, which would make it a lot less safe, but quite possibly enable it to burn.

-Mark

Click to expand...

agreed, i wouldn't take out the IR filter though, then your to the point where it may burn anything from a match to your cornea. just buy a more powerful laser, DX is suspiciously cheap

ok so....."WHAT IF" i were to put a 200mw ir diode in it? what would happen?

Mohrenberg said:

ok so....."WHAT IF" i were to put a 200mw ir diode in it? what would happen?

Click to expand...

It probably is a 200mW diode in it.


-Adam

1.  How many mW is this green pointer when you got it?

2.  Depending on the answer to the above question, the IR LD might be over 200mW anyway.  You need allot of IR for a fair amount of Green... [waits for physics master to implement formula] I believe there is roughly 80-90% power loss of the IR converting to green light, so with a 200mW LD you should get around ~25 mW of 532nm.

3.  Are you changing the driver? because the one it came should have a current regulator that prevents over current to what the LD is set for.  It might have a pot, but the adjustments might be minimal, you may be able to squeeze a little more current out but I wouldn't count on it.  

EDIT:

4. You will have a HELL of a time re-aligning everything you'll probably just give up. But seriously, it will be the largest challenge, unless you use the exact same LD, and fit everything back together agian, the smallest difference will make it not work at all, and I mean super freaken small! about 1/100 the size of this text

Ace82 said:

1. How many mW is this green pointer when you got it?

2. Depending on the answer to the above question, the IR LD might be over 200mW anyway. You need allot of IR for a fair amount of Green... [waits for physics master to implement formula] I believe there is roughly 80-90% power loss of the IR converting to green light, so with a 200mW LD you should get around ~25 mW of 532nm.

3. Are you changing the driver? because the one it came should have a current regulator that prevents over current to what the LD is set for. It might have a pot, but the adjustments might be minimal, you may be able to squeeze a little more current out but I wouldn't count on it.

Click to expand...

Generally green is 15-30% efficiency. Blue (473nm DPSS) is only 1-2.5%

-Adam

What is the difference between saturated and unsaturated?

laserwanabe said:

What is the difference between saturated and unsaturated?  

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When a crystal is "saturated" it means that pumping it with more light will not yield a substantially higher output. It may even decrease in efficiency and drop in power output.

Let's say there is a crystal set capable of pumping out 100mW of green and is saturated at 500mW from the pump.
With the pump diode at 100mW it outputs 5mW 532nm and for every 50mW from the pump, the 532nm output increases by 5mW. Eventually, once that crystal set reaches it's saturation point (500mW from the pump diode) the conversion efficiency will drop significantly and may only output 1mW more of 532 for every 50mW of 808.
Does that make sense?

Also, oversaturation can damage the crystals or cause mode hopping and power loss.

RA_pierce said:

[quote author=laserwanabe link=1225063258/0#10 date=1225151310]What is the difference between saturated and unsaturated?

Click to expand...

When a crystal is "saturated" it means that pumping it with more light will not yield a substantially higher output. It may even decrease in efficiency and drop in power output.[/quote]
if i'm not mistaken, if the crystal is already fully saturated then putting through more current will not only decrease its overall efficiency, but most likely kill it