Old 10-09-2008, 04:42 AM #1
Class 1 Laser
 
Join Date: Oct 2008
Posts: 54
Rep Power: 10
PyroEric is on a distinguished road
Send a message via Yahoo to PyroEric
PyroEric PyroEric is offline
Class 1 Laser
 
Join Date: Oct 2008
Posts: 54
Rep Power: 10
PyroEric is on a distinguished road
Send a message via Yahoo to PyroEric
Default Rubies and high powered lasers....

I have a number of large 16mm diameter rubies from when my ex was on a homemade jewelry making kick, have 9 of them left. One was cut really poorly so I played around with it underneath the 20" x36" fresnel lens on a bright summer day.

The shape of the cut tends to act like a lens, making a tight point of light at the back of the gem, and with the fresnel lens it produced a very tight narrow heating spot, burning a hole in the 2800 degree refractory cement brick it was laying on.

At around 3000 degrees they glow so bright that you cant look at them even from a long ways away, once they cool to the point where they dont glow, they appear dark black, once they cool more they go back to the normal red. Heating them up that high can cause cracks to form.

I also played around with them with the 5mw red pointers I have but was wondering if anyone has experimented with rubies and 200-300 mw red lasers. It would be interesting to see if they convert more of the lasers output into IR.

They are lab rubies, NOT simulated rubies, they are chemically / atomically exactly the same as real rubies except for the fact that they have no flaws and are more or less optically perfect.

If you have some diamond grinding bits for a rotary tool you can grind them into lenses ....





PyroEric is offline   Reply With Quote


















Old 10-09-2008, 12:34 PM #2
Class 1 Laser
 
Join Date: Aug 2008
Posts: 79
Rep Power: 10
Viracocha is on a distinguished road
Viracocha Viracocha is offline
Class 1 Laser
 
Join Date: Aug 2008
Posts: 79
Rep Power: 10
Viracocha is on a distinguished road
Default Re: Rubies and high powered lasers....

I thought laser rubies had been doped with something to make them lase and the ruby itself was only the carrier, like the yag crystals in green lasers?
Viracocha is offline   Reply With Quote
Old 10-10-2008, 06:18 AM #3
FrothyChimp's Avatar
Class 2M Laser
 
Join Date: Sep 2007
Posts: 977
Rep Power: 81
FrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond repute
FrothyChimp FrothyChimp is offline
Class 2M Laser
FrothyChimp's Avatar
 
Join Date: Sep 2007
Posts: 977
Rep Power: 81
FrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond reputeFrothyChimp has a reputation beyond repute
Default Re: Rubies and high powered lasers....

The dopant for ruby laser is chromium. Chromium is what gives ruby it's red color. Without it would just be a clear sapphire. Sapphire is the substrate material just as it is in YAG. Neodymium gives sapphire the pinkish purple color while chromium makes it red.
__________________
The Frothy Chimp
Cynic Extraordinaire
Why yes, I am a rocket scientist

Good whiskey, fine cigars, long legged women and blues guitar.
That's what I like.

The strong shall stand, the weak shall fall by the wayside.
FrothyChimp is offline   Reply With Quote
Old 10-10-2008, 09:32 AM #4
Switch's Avatar
Class 3B Laser
 
Join Date: Dec 2007
Posts: 3,327
Rep Power: 2795
Switch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond repute
Switch Switch is offline
Class 3B Laser
Switch's Avatar
 
Join Date: Dec 2007
Posts: 3,327
Rep Power: 2795
Switch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond reputeSwitch has a reputation beyond repute
Default Re: Rubies and high powered lasers....

This is really interesting.Do they glow without exposure to light until they cool down? :-? What's that phenomenon called?

I have a piece of raw chromium ore(i think).It fluoresces a pinkinsh red colour under the bluray.Better viewed with goggles because it's pretty dim.

Gotta find some jewelry and shine lasers at them
Why would it convert red to IR? I guess I could check that with a camera, but it's gonna be hard finding a filter that blocks red , yet passes IR.Probably nothing household. :-/
Switch is offline   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

























Privacy Policy | Advertising Disclaimer | Terms of Use


 


All times are GMT. The time now is 07:33 PM.


Powered by: vBulletin
Copyright ©2000 - 2018, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO
Privacy Policy | Advertising Disclaimer | Terms of Use
Copyright (C) 2017 Laser Pointer Forums, LLC