Here is a pic of a 10cent Homemade Pulsed Hologram made with Homemade Ruby Laser:
Pulse energy and plate sensitivity are unknown since this is the very first serious test with this rig.
Now I need more ruby stuff. Anyone has M-60 Rangefinder parts for sell? eg. rods, cavities, flashlamps.
tnx
Pulsed Homemade Hologram
Pulsed Homemade Hologram
Cristiano, that's wonderful. How exciting to be making holograms with your own homemade pulsed ruby laser!!
Anyway, if you haven't already been there, you might be able to find the components you need on: photonlexicon.com and also on the usenet group called: alt.lasers both sites are visited by laser enthusiasts with extensive knowledge and there is also an active buy/sell/trade going on. Best wishes,
Anyway, if you haven't already been there, you might be able to find the components you need on: photonlexicon.com and also on the usenet group called: alt.lasers both sites are visited by laser enthusiasts with extensive knowledge and there is also an active buy/sell/trade going on. Best wishes,
Pulsed Homemade Hologram
Hello Christiano
Congrats with the results you were able to achieve with your ruby laser. Would you mind discussing your laser's design, e.g. what kind of reflector and flash tube were used, dimensions of the ruby rod, is the rod is mirrored or were external mirrors used, is it actively cooled, repetition rate etc.? Thank you.
Ahmet
Congrats with the results you were able to achieve with your ruby laser. Would you mind discussing your laser's design, e.g. what kind of reflector and flash tube were used, dimensions of the ruby rod, is the rod is mirrored or were external mirrors used, is it actively cooled, repetition rate etc.? Thank you.
Ahmet
Pulsed Homemade Hologram
The reflector is a homemade alluminum cylindical reflection cavity, the rod is 3inches Lenght x 1/4 inch Diam with mirrored ends, the medium is pumped by four 250J (max) helical xenon lamps. The system is uncooled since the pulse rate is 1 shot every 60 seconds.a_k wrote:Hello Christiano
Congrats with the results you were able to achieve with your ruby laser. Would you mind discussing your laser's design, e.g. what kind of reflector and flash tube were used, dimensions of the ruby rod, is the rod is mirrored or were external mirrors used, is it actively cooled, repetition rate etc.? Thank you.
Ahmet
By the way this laser is built to be just a bread-board rather a Holographic system!
Cristiano
Pulsed Homemade Hologram
Thanks a lot for the information. I just saw some ruby rods with 99.6% / 55% reflective mirrors. Do you use something similar? Did you pay attention at what pump energy level the lasing starts (capacitor size/charging voltage)? The most challenging part would be to get TEM00 and improving the coherence length i guess.
Please keep us posted.
Please keep us posted.
Pulsed Homemade Hologram
(loud applause) - Very cool!
So what was the plate and how was it developed?
(more applause) - Simple homemade pulse lasers good enough for holography could open lots of possibilities...
So what was the plate and how was it developed?
(more applause) - Simple homemade pulse lasers good enough for holography could open lots of possibilities...
Pulsed Homemade Hologram
Yes, I used similar rod. I carefully calculated the Pulse Forming Network to get the maximum efficiency, very tricky job because I did not have the datasheet of the flashlamps. The rod starts to lase around 600J input, quite hight energy maybe due to possible improvements of the reflective cavity. Also the flashlamps aren't the state-of-the-art for laser applications, they were designed for photography pourpose.a_k wrote:Thanks a lot for the information. I just saw some ruby rods with 99.6% / 55% reflective mirrors. Do you use something similar? Did you pay attention at what pump energy level the lasing starts (capacitor size/charging voltage)? The most challenging part would be to get TEM00 and improving the coherence length i guess.
Concerning the TEM, with this kind of rod is not possible to select modes since there is no way to access to the resonant cavity.
Correctgeso wrote:Interesting! So your laser had no frequency selecting etalon?
I shot the test hologram using my homemades plates sensitized in the deep red region by the add of cryptocyanine dye. Years ago Jeff suggested me to give this dye a chance with his diffusion method, and it seemed to work fine.Tom B. wrote: So what was the plate and how was it developed?
The test holograms was developed as I usually process my holograms: phisical-chemical developer followed by rehalogenating bleach. A combination of D-19 and FeEDTA bleach should work too shifting the final image to the orange.
Pulsed Homemade Hologram
When shooting a coin I don't think this would be an issue. No need for coherence length.Cristiano_Perrucci wrote:geso wrote:
Interesting! So your laser had no frequency selecting etalon?
Very nice Cristiano.