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 07-16-2014, 03:38 PM #1
robomont's Avatar
Class 1M Laser
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
robomont robomont is offline
Class 1M Laser
robomont's Avatar
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
Default 405nm jacobs ladder

first i want to say is,
ive been here about a year as a member and this is by far the coolest ,smartest most professional site ive ever had the oppurtunity to be a member of.good job to whoevers in charge.

ok in physics,50% ionization of air is 0 resistence to electricity.
so couldnt two uv lasers be used to make a jacobs ladder.to replace the two wires.
for those who dont know,a jacobs ladder is the thing with two parrallel wires that have a spark run between and up.usually mad scientist and dr.frankenstein have them.sometimes they may have a slight v shape to the two wires.
any thoughts?


__________________
flaminpyro sh-032 aurora 445nm 1500mw
staples cheap 5mw red
robomont is offline   Reply With Quote







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







Old 07-16-2014, 05:50 PM #2
Banned
 
Join Date: May 2014
Location: I come from a land down under!
Posts: 346
Rep Power: 0
RayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond repute
RayJay RayJay is offline
Banned
 
Join Date: May 2014
Location: I come from a land down under!
Posts: 346
Rep Power: 0
RayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond repute
Default Re: 405nm jacobs ladder

That sounds awesome! Let me think about it a bit.
RayJay is offline   Reply With Quote
Old 07-16-2014, 06:16 PM #3
IsaacT's Avatar
Class 4 Laser
 
Join Date: Aug 2010
Location: Austin, TX
Posts: 5,904
Rep Power: 932
IsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond repute
IsaacT IsaacT is offline
Class 4 Laser
IsaacT's Avatar
 
Join Date: Aug 2010
Location: Austin, TX
Posts: 5,904
Rep Power: 932
IsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond reputeIsaacT has a reputation beyond repute
Default Re: 405nm jacobs ladder

Something inside me says no, but I would love to see what people who know things about stuff like this say.
__________________
ALL MY BUILDS/REVIEWS HERE *CLICK!*
MY BEST BUILDS: Adegan Relic | Aquarius | Frost | Ivy

Been bitten by the shutterbug hard.

IsaacT is offline   Reply With Quote
Old 07-16-2014, 06:43 PM #4
robomont's Avatar
Class 1M Laser
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
robomont robomont is offline
Class 1M Laser
robomont's Avatar
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
Default Re: 405nm jacobs ladder

if we take it a step further and mount a tazer on to two insulated handheld lasers.then when the tazer is fired,the positive voltage runs down one beam and negative down another beam.when these beams hit a person.they short out and so basically it would be a long distance tazer.
__________________
flaminpyro sh-032 aurora 445nm 1500mw
staples cheap 5mw red

Last edited by robomont; 07-16-2014 at 07:23 PM. Reason: spelling
robomont is offline   Reply With Quote
Old 07-16-2014, 07:13 PM #5
Banned
 
Join Date: May 2014
Location: I come from a land down under!
Posts: 346
Rep Power: 0
RayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond repute
RayJay RayJay is offline
Banned
 
Join Date: May 2014
Location: I come from a land down under!
Posts: 346
Rep Power: 0
RayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond reputeRayJay has a reputation beyond repute
Default Re: 405nm jacobs ladder

Quote:
Originally Posted by robomont View Post
if we take it a step further and mount a tazer on to two insulated handheld lasers.then when the tazer is fired,the positive voltage runs down one beam and negative down another beam.when these beams hit a person.they short out and so beasically it would be a long distance tazer.


...............You just blew my mind..
RayJay is offline   Reply With Quote
Old 07-16-2014, 07:22 PM #6
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: 405nm jacobs ladder

Out in town so can't write a fully reply in detail; the short answer is no; the irradiance level needed for air ionization with >300nm isn't available outside of high intensity pulsed lab lasers.

I'll reply in detail if someone bumps this thread or I remember to come back, lol.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 07-16-2014, 07:48 PM #7
robomont's Avatar
Class 1M Laser
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
robomont robomont is offline
Class 1M Laser
robomont's Avatar
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
Default Re: 405nm jacobs ladder

no problem sig.i would love to have a more detailed description when you have time.also is it possible to build hand held pulse lasers in the correct frequency that would give the needed ionization ?
__________________
flaminpyro sh-032 aurora 445nm 1500mw
staples cheap 5mw red
robomont is offline   Reply With Quote
Old 07-16-2014, 09:20 PM #8
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: 405nm jacobs ladder

Back home now.

The problem isn't frequency per se. Granted, frequency (actually pulse width) has a lot to do with the energy deposition amplitude in pulsed systems, but it isn't a matter of finding the right frequency, it is a matter of having enough joules in a single pulse.

A better way to explain it is this; pulsing a CW laser does not a "pulse laser" make. In other words you can pulse your 5W 450nm diode as fast as you want, but it will NEVER cause induced air ionization.

There are a few ways to generate laser induced plasma breakdown of air, all of them involve Q switched lasers. The typical lasers are Nd:YAG (pure (IR), doubled (532), tripled (355), and quadrupled (266)), CO2, N2 (not TEA), Ti-Saph, and Ruby. These lasers deliver many joules of energy per pulse. If these were to operate CW or QCW you'd be talking about kilowatts of power. Handheld technology cannot even store enough pump energy to power one of these lasers. We can get close with Nd:YAG by using a backpack based power and cooling system, but it would be an engineering feat.

An important thing to note is that these lasers do not induce a plasma channel the entire length of the beam, but only at a single focal point where the laser is focused.

Mechanics: air ionization (of a theoretical source, not from laser light) would result in a plasma channel forming along the axis of ionization not perpendicular to it. In other words if you have two plasma-inducing-fictional-laser beams facing vertically with a distance between the two parallel beams and placed an electrode at each beam's ionization spot nothing would happen (other than two loud bangs). No current would flow as electrically it is the same thing as having slightly longer electrodes. There is no path for the current to flow since the ionization points are parallel and the voltage isn't enough to break down the gap between points. If you have the two points on lines that intersect at some point then you could have a current flow provided the charge voltage is set so that it doesn't break down the gap until the gap is slightly shortened by the ionization of the focal point.

It wouldn't be a continuous flow though, it would just be a momentary pulse of electricity. High current discharge would allow for thermal energy from the discharge to extend the life of the plasma, but only for a short period before convection kicks in. Convection draws the ionized air up and out of the plasma channel, and nonionized air replaces it from below. This regular air presents a higher resistance, which restricts current, increases the voltage drop across the arc, and soon the arc extinguishes. You wouldn't get a traveling arc as in a jacob's ladder, as the ladder electrodes form a new jumping off point for the vertically rising stream of ionized air. If you film a ladder in high speed it is actually a series of individual air breakdowns that follows the initially ionized air upward. Also, the voltage has to exceed the air breakdown potential of nonionized air to initiate the process. In the laser induced ionization example the voltage is less than the nonionized breakdown potential so after the ionized air moves upward and the arc extinguishes there is nothing left to initiate another arc. You could use another pulse from the laser but there's not much point, raising the voltage would allow repeated arc formations without the need of expensive, fragile, and overly complex laser systems.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 07-16-2014, 09:40 PM #9
robomont's Avatar
Class 1M Laser
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
robomont robomont is offline
Class 1M Laser
robomont's Avatar
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
Default Re: 405nm jacobs ladder

thankyou sig.that is a very detailed explanation and i understood all of it.

i had forgotton about the jacobs ladder needing to be vertical for the ioniz
__________________
flaminpyro sh-032 aurora 445nm 1500mw
staples cheap 5mw red
robomont is offline   Reply With Quote
Old 07-16-2014, 09:41 PM #10
robomont's Avatar
Class 1M Laser
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
robomont robomont is offline
Class 1M Laser
robomont's Avatar
 
Join Date: Mar 2013
Location: ne texas
Posts: 188
Rep Power: 46
robomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond reputerobomont has a reputation beyond repute
Default Re: 405nm jacobs ladder

thankyou sig.that is a very detailed explanation and i understood all of it.

i had forgotton about the jacobs ladder needing to be vertical for the ionized smoke to rise within the two wires.
i sent you an email also..again,thankyou for your time and input.
__________________
flaminpyro sh-032 aurora 445nm 1500mw
staples cheap 5mw red
robomont is offline   Reply With Quote
Old 07-16-2014, 09:46 PM #11
Sigurthr's Avatar
Class 3B Laser
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Sigurthr Sigurthr is offline
Class 3B Laser
Sigurthr's Avatar
 
Join Date: Dec 2011
Location: Michigan's U.P.
Posts: 4,382
Rep Power: 873
Sigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond reputeSigurthr has a reputation beyond repute
Default Re: 405nm jacobs ladder

No problem at all, glad to help. Questions like these are what promote intellectual growth. Never stop dreaming things up, just remember to equally temper dreaming and curiosity with due diligence and research. To wonder about everything does a philosophical man make, but to invest one's self in learning about all he wonders a wise man does make.
__________________
Amateur Multispectral Photographer - [X-Ray, UV, Vis, IR]
Amateur Electrical Engineer
Autodidact
Tesla Coil Expert
Sigurthr is offline   Reply With Quote
Old 07-17-2014, 02:53 AM #12
upaa27's Avatar
Class 2M Laser
 
Join Date: Jul 2013
Location: San Francisco
Posts: 624
Rep Power: 191
upaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond repute
upaa27 upaa27 is offline
Class 2M Laser
upaa27's Avatar
 
Join Date: Jul 2013
Location: San Francisco
Posts: 624
Rep Power: 191
upaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond reputeupaa27 has a reputation beyond repute
Default Re: 405nm jacobs ladder

That would be really cool and will probably be possible 50 years from now because of something we overlooked but I do not think that is possible as I do believe that the wires vary in resistance(to allow the electricity to climb) while a laser simply can't do that. I am not an expert on that sort of stuff though so I can't be sure.
upaa27 is offline   Reply With Quote
Old 07-17-2014, 09:05 AM #13
The Lightning Stalker's Avatar
Class 3B Laser
 
Join Date: Aug 2013
Location: MI, US
Posts: 2,654
Rep Power: 716
The Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond repute
The Lightning Stalker The Lightning Stalker is offline
Class 3B Laser
The Lightning Stalker's Avatar
 
Join Date: Aug 2013
Location: MI, US
Posts: 2,654
Rep Power: 716
The Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond reputeThe Lightning Stalker has a reputation beyond repute
Default Re: 405nm jacobs ladder

Yes, good explanation, sig. To create more than a small "point" of ionized air would require a tremendous
amount of energy because the instability acts as a lens to defocus the laser. Even the most powerful
lasers aren't powerful enough.
__________________
ALL NEW MEMBERS MUST READ THIS!!! --> http://www.laserpointersafety.com

"Where, now, is the way by which the light distributes itself" - Job 38:24

YouTube Channel
The Lightning Stalker is offline   Reply With Quote
Old 07-23-2014, 03:14 AM #14
Seoul_lasers's Avatar
Class 3R Laser
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,313
Rep Power: 5175
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Seoul_lasers Seoul_lasers is online now
Class 3R Laser
Seoul_lasers's Avatar
 
Join Date: Jul 2008
Location: Victoria, British Columbia
Posts: 2,313
Rep Power: 5175
Seoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond reputeSeoul_lasers has a reputation beyond repute
Send a message via Skype™ to Seoul_lasers
Thumbs up Re: 405nm jacobs ladder

Quote:
Originally Posted by The Lightning Stalker View Post
Yes, good explanation, sig. To create more than a small "point" of ionized air would require a tremendous
amount of energy because the instability acts as a lens to defocus the laser. Even the most powerful
lasers aren't powerful enough.
Correct, I couldn't agree more with the above statement.
__________________
650nm ~350mW DVD 20x diode RyanSoh3 Class IIIb
650nm ~350mW DVD 22x 3.5mm labby build 2010 Class IIIb
532nm 10mW-15mW DPSS Module IR filtered(S.Korea)RyanSoh3 Class IIIb
450nm CarbonFiber ElectricPlasma build 9mm +6W Class IV
445nm 3.49W pk ~3.15W av. Sinner Cypreus II +DTR 9mm 445nm Class IV
445nm RHD Saber Twins 2.7W ~2.35W pk Class IV
445nm A140 module x2 Maxsink Class IV
405nm Daguin Kryton Groove SO6J 700mW build. Class IV
405nm Olike 560mW-600mW pen sold Scopeguy20
Class IV
337.1nm TEA Nitrogen laser project 2011 Class IIIb
---------------------------------------------------
Die4Drivers 1.3v lab laser/projector driver

Laserbee 3.2W Deluxe LPM
ARGMeter 1.1v
Ophir 20C-A sensor

Peregrine 1.5.0 is working now on MacOSX Yay!!
Seoul_lasers is online now   Reply With Quote
Old 07-23-2014, 01:17 PM #15
Class 2 Laser
 
Join Date: Jan 2011
Posts: 358
Rep Power: 1116
lazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond repute
lazeristasUVISIR lazeristasUVISIR is offline
Class 2 Laser
 
Join Date: Jan 2011
Posts: 358
Rep Power: 1116
lazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond reputelazeristasUVISIR has a reputation beyond repute
Default Re: 405nm jacobs ladder

Quote:
Originally Posted by Sigurthr View Post
An important thing to note is that these lasers do not induce a plasma channel the entire length of the beam, but only at a single focal point where the laser is focused.
Recently a paper was presented where two laser beams propagated collinear in a way that the second beam pumped the first, and the first generated a very long channel. I think it was in Laser Focus World.
__________________
L is for Lasers, and they are good for me.
lazeristasUVISIR is offline   Reply With Quote
Old 07-23-2014, 05:37 PM #16
madmacmo's Avatar
Class 2 Laser
 
Join Date: Dec 2009
Location: Tulsa, OK
Posts: 280
Rep Power: 874
madmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond repute
madmacmo madmacmo is offline
Class 2 Laser
madmacmo's Avatar
 
Join Date: Dec 2009
Location: Tulsa, OK
Posts: 280
Rep Power: 874
madmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond reputemadmacmo has a reputation beyond repute
Default Re: 405nm jacobs ladder

Quote:
Originally Posted by lazeristasUVISIR View Post
Recently a paper was presented where two laser beams propagated collinear in a way that the second beam pumped the first, and the first generated a very long channel. I think it was in Laser Focus World.
Dual Laser Beam Creates Plasma Channel

But much earlier research has already been done:
This paper in 2011 - University of Arizona
And this paper in 2008 - Journal of Applied Physics 103, 103111

Last edited by madmacmo; 07-23-2014 at 05:45 PM.
madmacmo 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


LinkBacks (?)
LinkBack to this Thread: http://laserpointerforums.com/f42/405nm-jacobs-ladder-90230.html
Posted By For Type Date
fun with lasers This thread Refback 07-27-2014 06:21 AM










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 10:14 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