High Voltage Forum

Electromagnetic radiation => Light, Lasers and Optics => Topic started by: LesWright on August 06, 2020, 03:28:14 PM

Title: LSI Nitrogen Laser tear-down and Homemade TEA Nitrogen and Dye Lasers
Post by: LesWright on August 06, 2020, 03:28:14 PM

Here are a couple of vids you guys might enjoy:

Nitrogen Laser tear down, power up, and Home Made Dye Laser Demonstration
A tear down of an LSI Nitrogen Laser:
36kW Peak Power
150uJ
4 ns
3mW average power @ 20Hz

This laser is re-assembled, then used to pump a small home-made Dye Laser.

Nitrogen Laser manuals are here:
http://www.337nm.com/Literature_VSL33...

Lambdachrome Dyes Datasheet is here:
http://www.chem.ucla.edu/~craigim/pdf...

**Note Volume is Very Low in this one! ***

Home made High Performance TEA Nitrogen Laser and Dye Laser!

In this video, I show three of my high performance designs for Home made TEA nitrogen Lasers.

Although these are quite simple to build, these are difficult to build well. My fist ever TEA Laser was held together with gravity and glue. The ones demonstrated here are worlds away from those first attempts!

The two Charge Transfer Lasers demonstrated, have high repetition rates, high output powers (peak and average) and are robust, with many thousands of shots possible before the dielectric has to be replaced.

These can easily drive a Dye Laser to threshold, in fact the peak power is so high, Dyes can be Lased Superradiantly (Feedback is so high, no mirrors are needed!)

Title: Re: LSI Nitrogen Laser tear-down and Homemade TEA Nitrogen and Dye Lasers
Post by: Weston on August 06, 2020, 08:45:59 PM

Cool! I see you are using pure nitrogen gas, have you tried running the lasers with atmospheric air?

A number of the TEA laser plans online claim they will work open to the atmosphere, but I was never able to get one working. I was living close to the ocean at the time while a friend who lived in Mexico City was able to get one working. I wonder if the atmospheric operation is quite marginal and the atmospheric pressure / humidity makes a difference.

Title: Re: LSI Nitrogen Laser tear-down and Homemade TEA Nitrogen and Dye Lasers
Post by: LesWright on August 06, 2020, 10:20:12 PM

Yes, in the first run in the video, there is just air in the channel. Only the gap is pressurized with N2. After that I flood the channel with N2 for more output. You can pressurize the gap with air, but it must be dry, else water vapour will condense in the gap.

Title: Re: LSI Nitrogen Laser tear-down and Homemade TEA Nitrogen and Dye Lasers
Post by: klugesmith on November 19, 2020, 06:44:08 PM

Just saw a similar thing at a nearby industrial auction site. Molectron brand, made in 1977.
https://edispositions.nextlot.com/public/sales/90590/lots/19080261

Title: Re: LSI Nitrogen Laser tear-down and Homemade TEA Nitrogen and Dye Lasers
Post by: Da_Stier on November 19, 2020, 09:52:03 PM

Interesting videos, you just got yourself a new subscriber.  :D
I already learned some new laser stuff from them.

... btw for me the yellow laser looks even greener than the green laser.  ;)