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Either that or it is one in the 2.2 uM region that uses Helium and another Inert Gas that I do not feel comfortable about talking about in an online forum. Then again it could be anything. Pulsed Ion Laser Holography brings up some real classics from the 70s. Pulsed Argon Laser Holography...

ublished: 01 May 1966 Study of power enhancements during the initial and afterglow transients of pulsed He-Ne gas lasers P. Burlamacchi & R. Pratesi Il Nuovo Cimento B (1965-1970) volume 43, pages150–165 (1966)Cite this article 23 Accesses 5 Citations Metricsdetails Summary

I quote: " Abstract: The pulsed helium-neon gas laser has provided pulse power more than three orders of magnitude above the average power afforded by CW operation. Analyses of the power-limiting factors show that still greater increases may be expected. By increasing the size of the laser tube...

There are oddities out there, ring gyro lasers with 40 meter paths, 5.4 micron Henes, large bore IR henes, attempts at 4 meter long bores. Henes made of hollow glass waveguide fibers Etc. At the end of the day, if you want high power red, your on a narrow bore. For the record, the large...

At 1150 and 3390 larger bores can make sense. I'm well aware of the large bores. I have a sealed mirror beastie made for obscure particle sensing applications lasing on a mix of primary lines. Raman lines, and four wave mixing lines. Around a 3-4 mm bore, and for a tube in the 14" class...

Depopulation of the lasing state is by bore wall collisions. The larger the bore, the less collisions. Beyond 1.5 mm, forget it. The world record HENE has a very wide, parallel wall, rectangular bore. 350 mW for a one meter tube, 750 for two in a Vee. Beam shape is a badly botched nose...

Attenuation Quick Reference: Power In (mW) Power Out (mW) Attenuator Value 10 9.0 -0.45 Db 10 8.0 -0.98 Db 10 6.0 -2.2 Db 10 5.0 -3 Db 10 2.5...

Directional Coupler split ratios 3 and 6 are worthless for your project, 10 is barely useful, 20 is even more useful if not perfect , 30 and 40 will be too expensive and kill your SA Coupling Value Split Ratio (%) 3 dB 50/50 6 dB 25/75 10 dB 10/90 20 dB 1/99 30 dB 0.1/99.9 40 dB...

Your cell specs 375 mW per channel max. That is certainly an overdriven situation, it should saturate optically much below that. From Minicircuits App Note 40, 26 Dbm is 398 mW. https://www.minicircuits.com/app/AN40-012.pdf So the used 30$ ZFL-1000H on Ebay is 100 mW or 20 Dbm when...

Minicircuits is your friend. These work, and they are not the only product on the market: https://www.spincore.com/products/USB-PTS/ An Arduino or Pi has more then enough IO pins for you to drive a PTS., 32 Khz steps are probably too fine for your application, 64 or 100 Khz is probably close...

Find yourself a working PTS-160 or PTS-250 or better on Ebay, the parallel port on the back is easy to program as it uses BCD, even better yet if it has front panel manual controls. 13 dbm = 20 mW, and believe it or not that will get you a faint image from the AOTF, if you look at a distant...

Ok, there is also mixing a CW signal with a variable bandwidth noise signal as our machine does at work. Linear feedback shift registers with carefully chosen feedback taps generate the noise. It is applied to a doubly balanced mixer to mix with the carrier. We can tune from 4 to 40 nm in...

I work with / play with AOTF / Pcaom for a living. Whose crystal do you have? AA,Brimrose, Neos Gouch, Interaction? You do NOT need a 3200$ Keysight for this. There are tons of USB synthesizer cards on the market. Typical max drive is 125 mW per channel , often a third of that, times 8...

One of many vendors: https://www.rpmclasers.com/types/volume-bragg-grating-laser-diodes/ Volume Bragg Gratings are good to between .01 to .1 nm. Usually far better if you stabilize the temperature and tune the drive current. As others have said filters are a way to get far better results...

LOOK for DIY ECDL articles in journals such as Review of Scientific Instruments or consider diodes with built in Bragg Gratings to fix the wavelength. Your average university engineering department will find it fairly easy to stabilize an LD with a little practice. Then there is this website...

Please do not try cathode re-flsshing on modern small tubes with Scandidate cathodes like JDSU. Blowing the emission layer off the cathode to getter the gas won't help you with these. In fact it will make it worse. These are not your classic dispenser cathode with the need to drive Barium to...

If you want a RGB show laser with this technology phone John at Technological Artisans n New York. He is the exclusive Goldenstar dealer for this technology in the US. He doesn't sell pointers. Just show lasers. Don't bother **** *** inc. unless you want 2500 pieces per part number. You won't...

Ha! I've had access to diodes with built in correction for a decade and a half. Nice to see y'all are catching up. Technology was developed and patented n the USA by **** *** ********* inc. 5 watts RGB at several meters did what is attached, drywall.. and the 1^e spot goes quite deep. My...

I have several B&W Tek 472s OEM labbies in working order. PM me if interested.