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Old 05-17-2009, 07:08 PM #17
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Originally Posted by .3lite View Post
Well, in my first post I've said that it's not possible to be CLEAR GREEN LIGHT of 110mW power from 300mW pump, but as you said, no IR filter, then the power of this module is sum of IR + green, now it's possible of course.
Hey man... take it easy. You don't need to rip on the seller. You're not gonna win...
Especially when my 120mW rated module from Susie outputs 135mW of 532nm and does not drop below 130mW for 3 minutes continuous use. That's with an IR filter on a Laserbee I.
Susie sells good products.
...Even if this thread is a little out of place.


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Old 05-17-2009, 07:14 PM #18
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Originally Posted by RA_pierce View Post
Hey man... take it easy. You don't need to rip on the seller. You're not gonna win...
Especially when my 120mW rated module from Susie outputs 135mW of 532nm and does not drop below 130mW for 3 minutes continuous use. That's with an IR filter on a Laserbee I.
Susie sells good products.
...Even if this thread is a little out of place.
I'm not going to rip the seller, far from it, just saying it's weird, I would see somebody testing it with an IR filter.
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Old 05-17-2009, 09:46 PM #19
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Here is the graph from Mike for the Stenkat 808nm 200mW diode
"I ran this diode later at 400 mA (270 mW) for a life test."

I made some research about the optical conversion efficiency of 808@1064 with Nd:YVO4 and 1064@532 with KTP.

Quote:
(from Casix)Recently, over 30 W of TEM00 output power was achieved by using a-cut Nd:YVO4 and pumped by 60 W fiber coupled diode lasers. The optical conversion efficiency exceeds 50%.High power and stable infrared output @ 1064 nm and 1342 nm has been available with diode pumped Nd:YVO4 lasers.
Quote:
Potassium Titanium Oxide Phosphate (KTiOPO4 ), or KTP, is an efficient nonlinear optical crystal in the visible to infrared spectral region with relatively low cost. It has large nonlinear coefficient. The effective nonlinear optical coefficient of KTP deff at 1064nm is more than 1.5 times that of BBO. It's damage threshold is near 1 GW/cm2 for 1 Hz 10 ns pulses at 1064nm. However, it is now limited to moderate to low power applications due to it's gray-tracking problem.

Advantage
  • Efficient frequency conversion(1064nm SHG conversion efficiency is about 80%)
These conversion efficiency can drop dramatically if the temperature is not controled. So 50% for Nd:YVO4 and 80% for KTP can be obtained for moderate temperature.

We know that olike module can do 140 mw(120-150mw version) of pure 532 nm with a 350 mA current.
i'm supposing that the pump diode in the olike module is the same than the Stenkat one, so at 350 mA, the graph of Mike say that the output of the diode is nearly 236 mw.
Supposing that the Efficiency is for both crystal 50% & 80%, i obtain an output power of 532 nm at 95 mW... which is far from the reality (about 140 mW).

1)It can't be the same diode as stenkat.
We obtain 140 mw of 532 nm. With both 50/80 efficiency for crystal, this tends to have a pump power of 808 nm at 350 mW .

i see on others websites that some 200 mw diode, if extrapoled can do 300 mW at 350 mA as .3lite say, or exactly at 370 mA (http://www.uocnet.com/pdf/LD/U-LD-80C044D-preliminary.pdf)

So 350 mW is a little too much, it seems to be 300 mW pump diode. The only explanation is that the efficiency of Nd:YVO4 is higher than 50 %. As the pump power is a "low power" compared to the 60W pump of casix, the efficiency could be higher than 50%, i guess 60%.

With a 300 mw diode and efficiency of both crystal at 60/80, it give an output of 144mW of pure 532 nm.

im a little surprised. I have always thought that the conversion efficiency was 35/40. Was wrong.
So this little module are great.

Last edited by mauswiesel; 06-04-2009 at 07:21 PM.
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Old 05-17-2009, 09:48 PM #20
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@.3lite
It's not weird to me... at that price...
Why don't you buy one and do the test for us...

Jerry
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Last edited by lasersbee; 05-17-2009 at 09:51 PM.
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Old 05-17-2009, 10:02 PM #21
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i wonder if we could obtain high power module from the 5 mw one. There is the same diode inside them, the same crystal with are bonded together. The same current.
The only difference , i guess, is in the direction of polarisation of pump diode with the Nd:YVO4.
By carrefully unscrewing the diode, and replace them to find the best position , im sure that we could get result.
I had some last year when i played with some low powered greenie.

I just saw at my little module from Susie : ARG the diode is press fitted .
Impossible to remove the diode without destroying it. That explain the difference of power of this module. Some diode are well postionned, the other, not (which provide low powered module).

Susie, what about a good price on 120~150 mw module ?

Last edited by mauswiesel; 05-17-2009 at 10:09 PM.
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Old 05-17-2009, 10:05 PM #22
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For $59.99 why bother... unless you want to experiment..

Jerry
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Old 05-18-2009, 06:51 AM #23
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Quote:
Originally Posted by mauswiesel View Post
i wonder if we could obtain high power module from the 5 mw one. There is the same diode inside them, the same crystal with are bonded together. The same current.
The only difference , i guess, is in the direction of polarisation of pump diode with the Nd:YVO4.
By carrefully unscrewing the diode, and replace them to find the best position , im sure that we could get result.
I had some last year when i played with some low powered greenie.

I just saw at my little module from Susie : ARG the diode is press fitted .
Impossible to remove the diode without destroying it. That explain the difference of power of this module. Some diode are well postionned, the other, not (which provide low powered module).

Susie, what about a good price on 120~150 mw module ?
Hi,can give 3% discount for old customer .contact wtih me if you need
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Old 05-18-2009, 12:56 PM #24
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Quote:
Originally Posted by lasersbee View Post
@.3lite
It's not weird to me... at that price...
Why don't you buy one and do the test for us...

Jerry
Yes, it's quite difference, "buy" and "test", I would test it if somebody provide me that module, but better thing would be that someone here with nice reputations would test it on good LPM with IR filter between, Susie should provide it just for test, and tester should send it back later (someone has to pay for shipping).
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Old 05-18-2009, 01:41 PM #25
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Quote:
Originally Posted by .3lite View Post
Yes, it's quite difference, "buy" and "test", I would test it if somebody provide me that module, but better thing would be that someone here with nice reputations would test it on good LPM with IR filter between, Susie should provide it just for test, and tester should send it back later (someone has to pay for shipping).
Hi 3lite

Actually we have ever made a group buy for this 100mW green laser module before .http://laserpointerforums.com/laser_...ad.php?t=39890
and many customers gave good feedback .so I think our module is proved well already ...
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Old 05-18-2009, 01:47 PM #26
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Hey .3lite..
Why should someone buy a module for you..... Just buy one yourself..

Didn't you read any of the previous posts...

I have already posted that I have an 80mW-100mW 532nm Module EXACTLY
like the one on the 1st post that Susie is selling...

I have already posted that my 80mW-100mW 532nm Module EXACTLY like the
one on the 1st post that Susie is selling... is putting out 120mW... without an
IR Filter....

With the other info on this thread like Susie's claims 10-12mW leakage...
with an IR Filter the output of my 80mW-100mW 532nm Module EXACTLY like
the one on the 1st post that Susie is selling would drop to 108mW- 110mW....
which is still OVER SPECIFICATIONS....

I can't explain this any cleared...........sorry.........

Like I posted above... If you don't believe what we are saying...you can do this
test yourself with an actual IR Filter...
Just purchase a module from Susie... Buy an IR Filter.. and test it with an LPM...

Like the treads Susie just posted.... "been there.... done that"...

Jerry
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Last edited by lasersbee; 05-18-2009 at 02:28 PM.
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Old 05-18-2009, 02:19 PM #27
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Quote:
Originally Posted by Standstone11 View Post
Hi,can give 3% discount for old customer .contact with me if you need
That's a very cool offer Susie, my 4 modules from before were great deals! I am seriously considering taking you up on the old customer offer for the 120- 150 mW green module. If I understand correctly, it's regular $105, so 3% off is $101.85, is shipping extra, or free , or free if at least 2, at least 100 mW modules are purchased together? Thanks Again! -Glenn
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Last edited by scopeguy20; 05-18-2009 at 07:07 PM.
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Old 05-18-2009, 04:42 PM #28
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Quote:
Originally Posted by scopeguy20 View Post
That's a very cool offer Susie, my 4 modules from before were great deals! I am seriously considering taking you up on the old customer offer for the 120- 150 mW green module. If I understand correctly, it's regular $105, so 35 off is $101.85, is shipping extra, or free , or free if at least 2, at least 100 mW modules are purchased together? Thanks Again! -Glenn
Hi Glenn ,

Nice to meet you here again . yes ,you are my old customer ,very old customer .
order >2pcs( any items with that module) ,free shipping .
yes $101.85 . for you .

Cheers
Susie
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Old 05-18-2009, 04:47 PM #29
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Does anyone know, do these modules support TTL modulation? I ask because I want to build a scanner and I'm wondering that if I make a heatsink for this, would I be able to use it and use TTL modulation.

Also, please forgive me if I don't sound like I know what I'm talking about. I don't really know what TTL is, but I'm assuming it's just a way to turn the green laser on and off fast by rapidly connecting and disconnecting the circuit. Thus, would this be considered "blanking"?
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Old 05-18-2009, 05:26 PM #30
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Quote:
Originally Posted by Alexizupinhea View Post
Does anyone know, do these modules support TTL modulation? I ask because I want to build a scanner and I'm wondering that if I make a heatsink for this, would I be able to use it and use TTL modulation.

Also, please forgive me if I don't sound like I know what I'm talking about. I don't really know what TTL is, but I'm assuming it's just a way to turn the green laser on and off fast by rapidly connecting and disconnecting the circuit. Thus, would this be considered "blanking"?
These modules do not have TTL modulation (blanking) built in at that price..

TTL means Transistor Transistor Logic.. there are 2 stares in TTL control
0 Volts and 5Volts there is a transition about half way between...

Zero Volts is considered "OFF" or a "0" state and 5 Volts is considered "ON"
or a "1" state..

You could always replace the driver with a TTL compatible driver...


Jerry
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Old 05-19-2009, 12:31 AM #31
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Quote:
Originally Posted by lasersbee View Post
These modules do not have TTL modulation (blanking) built in at that price..

TTL means Transistor Transistor Logic.. there are 2 stares in TTL control
0 Volts and 5Volts there is a transition about half way between...

Zero Volts is considered "OFF" or a "0" state and 5 Volts is considered "ON"
or a "1" state..

You could always replace the driver with a TTL compatible driver...


Jerry
Thanks for the help. So basically this driver from o-like would work fine?: http://o-like.com/b2b_cpinfo.asp?id=987

Also, in order to set up the current right on it, what exactly would I need to do? (I've never set the current on any drivers... always used set resistors for my DDL, or pre-fixed set resistor drivers from rkcstr)

Edit: btw, forgot to say thanks again Laserbee and anyone else who answers any of my questions . Its people like you who make the forums so friendly and helpful.

And @ Susie..., if I buy one 100mW module for $60 + $4 shipping, can I get the $5.80 drivers with no additional shipping cost (since there's practically no additional cost to ship). So basically, can I just pay $70 total including shipping for one 100mW module and 2pcs CC Drivers?

Last edited by Alexizupinhea; 05-19-2009 at 12:36 AM.
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Old 05-19-2009, 12:51 AM #32
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I haven't tried those drivers myself... so I can't comment on them...
they do have a TTL input..

To adjust a driver's current you will need a Dummy Test Load...
You will need to do a [Search] to find out how to build one...and
use it..
It is really easy...

Jerry
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