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Old 02-22-2010, 02:22 PM #1
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Default Collimating 808nm in an Aixiz module

Last night I put an Aixiz module on the lathe and opened it to accept 9mm diodes.

I'm trying to collimate the 808nm IR light, and I'm not exactly sure what optics will be required. The diode does not have FAC. I tried a 405-G-1 lens I had laying around, just to see if it had any effect, and no, it did not collimate whatsoever.

Is there any collimation solution for 808nm light which will thread into the Aixiz module? If so, I need to order it up.

Here is a photo showing it next to a standard 5.6mm mounted diode:



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Old 02-22-2010, 05:09 PM #2
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Default Re: Collimating 808nm in an Aixiz module

Simple red laser coated lens work very well with 808 nm light.
BTW, you can get housings for 9mm diodes from O-like,
$4 module, $1 plastic lens or $4 glass ARC lens , and $2 shipping, just ask Susie on MSN.

Using the lens to collimate without cylindrical lense is not neccesarely bad. You can collimate a good burning spot about 10 cm from the lens, and it burns like crazy (I've been doing 1W , don't know about your diodes).
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Old 02-22-2010, 06:03 PM #3
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by Eudaimonium View Post
Using the lens to collimate without cylindrical lense is not neccesarely bad.
Can you explain what you mean by the statement above? I'm not following you.

Thank you for the other info. I have been dealing with THOR labs, and I really like their quality. Shipping from O-like really bogs down my projects, and I try to avoid having to order from China when possible. I can just machine the Aixiz modules myself, so that saves time ordering the actual 9mm modules. Maybe THOR labs modules would work well, but they are $111 and that's a lot for me. If I could find something cheap in the US for 808nm, and it fits Aixiz threads, that would be great.

So, are you saying I could simply use something like a 650-G-1 lens from Jayrob to make this work, since it is intended for red light? Like I said, the 405-G-1 lens does not collimate or focus this at all. Turned throughout the adjustment range, the light almost always exits at about a 45 degree angle. (There is no focal point outside of the lens.)

Thanks
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Old 02-22-2010, 06:16 PM #4
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by Exerd View Post
Can you explain what you mean by the statement above? I'm not following you.

Thank you for the other info. I have been dealing with THOR labs, and I really like their quality. Shipping from O-like really bogs down my projects, and I try to avoid having to order from China when possible. I can just machine the Aixiz modules myself, so that saves time ordering the actual 9mm modules. Maybe THOR labs modules would work well, but they are $111 and that's a lot for me. If I could find something cheap in the US for 808nm, and it fits Aixiz threads, that would be great.

So, are you saying I could simply use something like a 650-G-1 lens from Jayrob to make this work, since it is intended for red light? Like I said, the 405-G-1 lens does not collimate or focus this at all. Turned throughout the adjustment range, the light almost always exits at about a 45 degree angle. (There is no focal point outside of the lens.)

Thanks
Meaning, perfecting the beam with cylindrical lens is not needed, if all you need is burning close range.

I don't know about USA supplier, I am in Croatia, same distance both from USA and China, except that China has more or less everything for cheap.

I build a 1W 9mm setup with nothing but glass lens in front of diode (9mm diode housing and lens from O-like), and that baby does some damage!
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Old 02-22-2010, 06:20 PM #5
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Default Re: Collimating 808nm in an Aixiz module

I have a 7Watt IR Laser without the FAC lens... and the beam spot
looks like a thin long line...
The FAC lens (or a cylindrical lens) turns that bean profile into a basically
square beam spot by collimating the Fast Axis of the beam...
Once you have a square beam... you can use a convex lens to collimate
the square beam... IMO

Please correct me if I've made a mistake in my explanations...


Jerry
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Old 02-22-2010, 06:28 PM #6
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by lasersbee View Post
I have a 7Watt IR Laser without the FAC lens... and the beam spot
looks like a thin long line...
The FAC lens (or a cylindrical lens) turns that bean profile into a basically
square beam spot by collimating the Fast Axis of the beam...
Once you have a square beam... you can use a convex lens to collimate
the square beam... IMO

Please correct me if I've made a mistake in my explanations...


Jerry
You could have just said:
Without FAC, the collimated laser is a line, not a dot, due to shape of emitting die.
FAC makes it square (or roundish), so you can focus it better for even MORE POWA.

Everyone would understand

And yeah... you think you da man with 7W?
Hold on your guts till I fire up my 25W diode bar (given to me by Bill, who has 60W and 100W 808nm diode bars).
You will see the smoke from my 'scientific experiments' all the way in USA.

EDIT, oh you in Canada, not USA. Sorry. Make that: all the way in America so I cannot go wrong.
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Old 02-22-2010, 06:42 PM #7
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Default Re: Collimating 808nm in an Aixiz module

I want a collimated beam, so I can burn things at a distance greater than a few centimeters.

Does anyone know where to purchase 2W 9mm 808nm diodes with the FAC lens?

That Heruursciences guy is selling them here, but he will not respond to any message I send his way, so I've scratched him off the list as a supplier.
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Old 02-22-2010, 06:45 PM #8
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by Eudaimonium View Post
You could have just said:
Without FAC, the collimated laser is a line, not a dot, due to shape of emitting die.
FAC makes it square (or roundish), so you can focus it better for even MORE POWA.


Everyone would understand

And yeah... you think you da man with 7W?
Hold on your guts till I fire up my 25W diode bar (given to me by Bill, who has 60W and 100W 808nm diode bars).
You will see the smoke from my 'scientific experiments' all the way in USA.

EDIT, oh you in Canada, not USA. Sorry. Make that: all the way in America so I cannot go wrong.
Isn't that what I said...

Who said that that was my highest output Laser....
It was the ONLY IR Laser I have without a FAC lens

I'm happy for you that you have powerful Lasers...
I hope you have appropriate Laser Safety Goggles for your
25 Watt diode bar....


Quote:
Originally Posted by Exerd View Post
I want a collimated beam, so I can burn things at a distance greater than a few centimeters.

Does anyone know where to purchase 2W 9mm 808nm diodes with the FAC lens?

That Heruursciences guy is selling them here, but he will not respond to any message I send his way, so I've scratched him off the list as a supplier.
Yeah.... Chris has a communication problem...
He keeps shooting himself in the foot every time he doesn't
respond to a message sent him in a timely manner...
He's been crossed of my list for a while now...


Jerry
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Old 02-22-2010, 06:49 PM #9
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by lasersbee View Post
Isn't that what I said...

Who said that that was my highest output Laser....
It was the ONLY IR Laser I have without a FAC lens

I'm happy for you that you have powerful Lasers...
I hope you have appropriate Laser Safety Goggles for your
25 Watt diode bar....

Jerry
Well, you did, only spiced up with 'fast axis' and that expressions. New guys here might not understand why they need FAC after all.

Nobody actually I know you must have some kW beasts in your garage
I only wanted to make a remark on how powerfull IR diode bars can get.
And that I am proud owner of one of them.

And don't worry my man, Bill supplied a Eagle Pair EP-5.
Protects from... well everything
200-450nm and 800-2000 nm.
I don't know how the hell can he have those a spare...

What kind of goggles do you use?
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Old 02-22-2010, 06:52 PM #10
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by Exerd View Post
I want a collimated beam, so I can burn things at a distance greater than a few centimeters.

Does anyone know where to purchase 2W 9mm 808nm diodes with the FAC lens?

That Heruursciences guy is selling them here, but he will not respond to any message I send his way, so I've scratched him off the list as a supplier.
Search for ebay seller snoctony.
I have bout C-mounts from him and have been satisfied.

Shipping is from china, however, and I believe their new year celebration just ended.
Some of his products are listed on the website snochina.com
I'm not sure if FAC is available on the 9mm packages but you can ask! Perhaps they will add one for you.
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Old 02-22-2010, 06:55 PM #11
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by Eudaimonium View Post
What kind of goggles do you use?
For testing our laser's in the SHOP we have a number of different
Laser Safety Goggles ranging from 200nm to over 2000nm... and we
have spares for the rare times a client needs to see his prototype
project in action..


Jerry
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Old 02-22-2010, 07:09 PM #12
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by lasersbee View Post
For testing our laser's in the SHOP we have a number of different
Laser Safety Goggles ranging from 200nm to over 2000nm... and we
have spares for the rare times a client needs to see his prototype
project in action..


Jerry
Wow, you offer that kind of service? Dude, awsome.
I cannot wait to take a deep dive into class IV, I am very new here still, only 1W IR so far tried out.

Me and Bill have to figure out a current regulator for 20A ... most likely it will be powered by computer PSU (12V molex can supply 25-30 A , depending on PSU).

I could fit everything into PSU enclosure right away, but the diode bar will be mounted on something MASSIVE and non-portable.
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Old 02-22-2010, 07:47 PM #13
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Default Re: Collimating 808nm in an Aixiz module

I tried the same thing. One thing you have to be careful with is what lens assembly you use. If you use the plastic threaded piece from aixiz the LD will melt the black plastic around the lens. So the first thing is to use only metal, or you will end up with residue on the emmiter.
This was even with a lens that had the rear sliced off.

Almost all LD's i got from heurr were not 808 and have a hard time putting out close to 1watt after the optics...

I also tried them in a green labby, 30mW of green from a 1W diode tells me they are not even close to 808nm.

If you need LD's to make green, snoctony on ebay sells nice LD's. I have used his in the past with no problems.
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Old 02-23-2010, 03:03 PM #14
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Default Re: Collimating 808nm in an Aixiz module

Yeah I messed with the 405-G-1 lens I have, and I got it to collimate and burn at about 4-5 inches away.

As stated, without FAC, the beam is a line. So even though it burns like crazy, it's burning over the area of a line, and could be much more capable if I could collimate that down to a spot.

Can I install an FAC lens myself easily, then another lens in front of it, so that I have a low millirad divergence beam?

I'm interested in knowing what lenses/modules would be compatible for doing this. I will order ASAP if I can find the supplier.

I am running my 1W diode at 1.5A off a V5 flexdrive. It overflows the Laserbee meter over 1050mW, after optics, in about 2 seconds. I'm guessing it's doing around 1.2W after glass.
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Old 02-23-2010, 03:51 PM #15
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Default Re: Collimating 808nm in an Aixiz module

Quote:
Originally Posted by Exerd View Post
Yeah I messed with the 405-G-1 lens I have, and I got it to collimate and burn at about 4-5 inches away.

As stated, without FAC, the beam is a line. So even though it burns like crazy, it's burning over the area of a line, and could be much more capable if I could collimate that down to a spot.

Can I install an FAC lens myself easily, then another lens in front of it, so that I have a low millirad divergence beam?

I'm interested in knowing what lenses/modules would be compatible for doing this. I will order ASAP if I can find the supplier.

I am running my 1W diode at 1.5A off a V5 flexdrive. It overflows the Laserbee meter over 1050mW, after optics, in about 2 seconds. I'm guessing it's doing around 1.2W after glass.
1.5 A is way too much for 1W diode. You should feed it around 1.2 A maximum, it will prolong it's life greatly.
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Old 02-23-2010, 06:11 PM #16
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Default Re: Collimating 808nm in an Aixiz module

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Originally Posted by Eudaimonium View Post
1.5 A is way too much for 1W diode. You should feed it around 1.2 A maximum, it will prolong it's life greatly.
LOL. They cost $10 a piece! I'll burn 100 of them to run them on the edge.

I'm looking for 2W 9mm 808nm diodes with FAC.

I checked that eBay seller, no current auctions, but I will email.

Any response to my optical questions?

Thanks
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