Laser pointer discussion. Read/write reviews of laser pointers and laser pointer companies. Learn about all types of laser pointers and lasers





Welcome to Laser Pointer Forums! If you are looking for a laser pointer or want to compare different laser pointer companies, you may want to check out the LPF Laser Pointer Company Database. The link will open in a new window for your convenience.








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes
Laser Technology Laser Pointer Parts Lasers by Wavelength
Top 10 Laser Pointer Companies Laser Pointer Company Database Visible Beam Laser Pointers


One laser store meets all your needs

























Go Back   Laser Pointer Forums - Discuss Laser Pointers > Lasers > Experiments & Modifications



LPF List of Laser Pointer Companies (link opens new window)



Reply
 
LinkBack Thread Tools Display Modes
Old 12-31-2006, 02:28 AM #1
SenKat
Guest
 
Posts: n/a
SenKat
Guest
 
Posts: n/a
Default 500mw 808nm diode question....

Okay - does anyone know what is the highest power of 532nm I could expect out of a 500mw 808nm diode if conditions are optimal ?

My plan - (please check for serious folly prior to me buying a few diodes to screw around with !)

replace the low powered diode in a Leadlight, or Fleabay pointer with the 500mw one....

Yup - that's all there is to my plan !!

So - I KNOW some of you have more experience than I, and probably know the formulas and all - what do you think ? Somebody - anybody please answer !!! I am DYING to try this - I DO have adequate eye protection, and I do have some IR filters to use if the leadlight or fleabay pointer is not equiped to block the IR.....


  Reply With Quote







LPF List of Laser Pointer Companies (link opens new window)







Old 01-15-2007, 11:25 PM #2
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,187
Rep Power: 4528
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is online now
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,187
Rep Power: 4528
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: 500mw 808nm diode question....

SKAt --

Again, it's luck of the draw. I've modded a couple Leadlights to 50 mW. Super BUT something has gone wrong and I think I have over heated the MCA. Power dropped in half and mA input almost doubled after a couple weeks. There are some high power MCA assemblies out there but kinda $$$$.

If you do it, heat will be your enemy. I've heard that the bond between the Nd portion of the crystal assembly and the KTP darkens with too much heat.

Mike
__________________
It's a dog's life
Hemlock_Mike is online now   Reply With Quote
Old 01-16-2007, 01:02 AM #3
Class 3R Laser
 
Join Date: Oct 2006
Posts: 2,032
Rep Power: 31
pseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud of
pseudonomen137 pseudonomen137 is offline
Class 3R Laser
 
Join Date: Oct 2006
Posts: 2,032
Rep Power: 31
pseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud of
Default Re: 500mw 808nm diode question....

Quote:
Originally Posted by Hemlock Mike
SKAt --

Again, it's luck of the draw. *I've modded a couple Leadlights to 50 mW. *Super BUT something has gone wrong and I think I have over heated the MCA. *Power dropped in half and mA input almost doubled after a couple weeks. *There are some high power MCA assemblies out there but kinda *$$$$.

If you do it, heat will be your enemy. *I've heard that the bond between the Nd portion of the crystal assembly and the KTP darkens with too much heat.

Mike
If you got a leadlight up to 50mW the symptoms you describe sound like you burned up the diode. When you completely overpower of them, you can kill the diode, but when you just put them under that type of stress they often drop to lower power, and may eventually fade to nothing. I believe this is due to the damage done to the end facets of the diode from such heat. Feel lucky though, my leadlight died after a mod to 8mW * *
pseudonomen137 is offline   Reply With Quote
Old 01-16-2007, 01:25 AM #4
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,187
Rep Power: 4528
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is online now
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,187
Rep Power: 4528
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: 500mw 808nm diode question....

Psuedo --

Thanks for the reply. I thought myself it was the diode fading out but others told me about the MCA. I will have to set up an IR power level meter to see what has happened. Your ideas agree with mine :-)

Mike
__________________
It's a dog's life
Hemlock_Mike is online now   Reply With Quote
Old 01-16-2007, 01:57 AM #5
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,187
Rep Power: 4528
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is online now
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,187
Rep Power: 4528
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: 500mw 808nm diode question....

Pseudo --

More info looking like you are right !! I lowered the range on one of my "sick" pointers and found something.

If I slowly turn the current up, I can get back to about 4 mW output at 230 mA. As I slowly go over that setting, it suddenly drops to about .5 mW output at 240 mA. I don't think the MCA can fall off that fast. This would look like a diode problem.

Thanks --

Mike
__________________
It's a dog's life
Hemlock_Mike is online now   Reply With Quote
Old 01-16-2007, 02:07 AM #6
Class 3R Laser
 
Join Date: Oct 2006
Posts: 2,032
Rep Power: 31
pseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud of
pseudonomen137 pseudonomen137 is offline
Class 3R Laser
 
Join Date: Oct 2006
Posts: 2,032
Rep Power: 31
pseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud ofpseudonomen137 has much to be proud of
Default Re: 500mw 808nm diode question....

Yep, I had a nice Aries laser that used to do 170mW and fell to only around 20-30 after the diode got messed up. I turned up the power to where I was getting >30mW and then anything after that it drops to nearly nothing. It was going to be RMAed anyway, so I just gave up and ran 7V through and killed the diode completely. Now I have another "black laser"
pseudonomen137 is offline   Reply With Quote
Old 01-16-2007, 09:31 PM #7
Hemlock_Mike's Avatar
Class 4 Laser
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,187
Rep Power: 4528
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Hemlock_Mike Hemlock_Mike is online now
Class 4 Laser
Hemlock_Mike's Avatar
 
Join Date: Jan 2007
Location: North Iowa
Posts: 6,187
Rep Power: 4528
Hemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond reputeHemlock_Mike has a reputation beyond repute
Default Re: 500mw 808nm diode question....

I just got my DL95 today -- too cold from outside to try until it warms up.
Will the diode hold up in this ?? I usually don't stay on for more than 10 seconds.

Mike
__________________
It's a dog's life
Hemlock_Mike is online now   Reply With Quote
Old 04-14-2007, 06:58 AM #8
Junior Member
 
Join Date: Apr 2007
Posts: 20
Rep Power: 0
ENIGMAFIED is on a distinguished road
ENIGMAFIED ENIGMAFIED is offline
Junior Member
 
Join Date: Apr 2007
Posts: 20
Rep Power: 0
ENIGMAFIED is on a distinguished road
Default Re: 500mw 808nm diode question....

Alright, now this question is right along what I want to know, but no one answered SenKat's question!!!

I want to do the same thing, except maybe with a 2, 3, or even a 5 watt 808NM diode...

Also, if the diode was replaced in a green cheapy laser by one of these units, SenKat's 500mw, or a 5W 808NM diode, would it be green that came out...?

Correct me if I am wrong, but I was under impression that you used a 1064NM diode and then that wavelength got cut in half to 532NM, making it green.

Thanks Guys!

Enigmafied
ENIGMAFIED is offline   Reply With Quote
Old 04-14-2007, 08:54 AM #9
Class 2M Laser
 
Join Date: Feb 2007
Posts: 810
Rep Power: 18
Tallaxo is just really niceTallaxo is just really niceTallaxo is just really niceTallaxo is just really niceTallaxo is just really nice
Tallaxo Tallaxo is offline
Class 2M Laser
 
Join Date: Feb 2007
Posts: 810
Rep Power: 18
Tallaxo is just really niceTallaxo is just really niceTallaxo is just really niceTallaxo is just really niceTallaxo is just really nice
Default Re: 500mw 808nm diode question....

Enigmafied. In theory you are correct if you were to frequency double a 1064 nm diode you could indeed achieve 532nm green light.

However this is not the way that 532nm light is actually produced. Relativly cheap 808nm IR diodes pump a crystal of Nd:YVO4, This emits light at the further IR of 1064nm which is then passed into a KTP crystal which frequency doubles the light to the 532nm which is the green.
I would hazard a guess that 1064nm diodes are available but I guess their cost is probably why 532nm light is produced This way

Jason.
Tallaxo is offline   Reply With Quote
Old 04-14-2007, 09:23 AM #10
Junior Member
 
Join Date: Apr 2007
Posts: 20
Rep Power: 0
ENIGMAFIED is on a distinguished road
ENIGMAFIED ENIGMAFIED is offline
Junior Member
 
Join Date: Apr 2007
Posts: 20
Rep Power: 0
ENIGMAFIED is on a distinguished road
Default Re: 500mw 808nm diode question....

Thanks tallaxo,

Now... could I throw a 2-5 watt diode in there...? Or would that cook everything inside of the cheapo green laser?

Do these things need to be focused or are they good just straight off the diode?

Last question this post does an IR laser beam travel the same as say a green laser? I thought I read somewhere that an IR laser spread out quicker or easier or something?

Thanks again,

Enigmafied
ENIGMAFIED is offline   Reply With Quote
Old 04-14-2007, 03:49 PM #11
Member
 
Join Date: Nov 2006
Posts: 38
Rep Power: 0
hammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond repute
Send a message via Yahoo to hammer_time
hammer_time hammer_time is offline
Member
 
Join Date: Nov 2006
Posts: 38
Rep Power: 0
hammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond reputehammer_time has a reputation beyond repute
Send a message via Yahoo to hammer_time
Default Re: 500mw 808nm diode question....

I'm not sure, but I think that leadlights might come with 500mW diodes...

All of this really depends on crystal efficiency. You can pump more power into the crystal, but at a certain point, called the saturation point if i remember right, the crystal will not take in any more IR and the remaining IR just sits there burning the crystal (might be why it turns brown Mike ) 5W in a leadlight case would not go over very well, you would break something and get nothing back. If you really want power search ebay for 808nm diodes then search for ND:YV04 and KTP crystals or hybrid crystals, which is just the two put into one. Or theoretically you could just use a 1064nm diode and KTP crystals, but i'm sure there is a reason they don't use them, especially in higher powered labbys where price doesn't really matter. That would be a cool experiment though!

Here is a hybrid ND/KTP crystal
http://cgi.ebay.com/LASER-CRYSTAL-SE...QQcmdZViewItem

Green kinda got boreing to me for a while, I forgot how complicated it really is!
hammer_time is offline   Reply With Quote
Old 04-14-2007, 05:18 PM #12
SenKat
Guest
 
Posts: n/a
SenKat
Guest
 
Posts: n/a
Default Re: 500mw 808nm diode question....

I have learned MUCH since posting that question ! 8-)

If you attempt this, you are in line for some aggravation....let me explain.
The leadlights, etc are PERFECTLY aligned all the way through the process - the diode is at a certain angle to shine on the NdYv04 crystal, then the ktp is at the precise angle it needs to be in order to lase. The alignment process is a PAIN - it was fun to try for the first 12 hours or so, but after that, my nerves were shot :-/

If the owner agrees, I could sell you a 500mw (IR) RPL laser from Optotronics that has the crystals mis-aligned and you can beat yourself up trying to get it to work perfectly, and you would end up with (in this case) a 120mw green laser. Everything it intact - but the laser has issues with the alignment...The owner has $200.00 invested in it - and I am certain he would sell given the chance. It IS really frustrating to get these things properly set up, and in less than optimal circumstances, you will be in for one hell of a ride ! I am NOT discounting the involvement of luck in this process - I just know I have had his laser for a while now, trying to get it to act right, and have been unable to do so.

Good luck with your experiments...they can be rewarding, offering a major learning experience, and frustrating at the same time !
  Reply With Quote
Reply





Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On











Loading








Green Laser Pointers by Category Blue Laser Pointers by Category Red Laser Pointers by Category
Yellow Laser Pointers by Category Violet Laser Pointers by Category Orange Laser Pointers by Category
Top Laser Pointers by Power - 1 Watt+ Top Laser Pointers by Power - 500mW+ Top Laser Pointers by Power - 250mW+
Laser Pointer Database High Power Laser Pointers Laser Pointer Diodes






Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 02:04 PM.


Powered by: vBulletin
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC