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4hv.org :: Forums :: General Science and Electronics
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Laser Rainbow

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GeordieBoy
Fri Mar 02 2012, 12:36AM Print
GeordieBoy Registered Member #1232 Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
Hi all,

I thought the laser fans here might like to see this:

Link2

It's an installation of 7 high-power lasers that projects a rainbow of light for 25 miles across the skies of North Tyneside!

It's only on until 4th March so I went along this evening to take a look. Very impressive!!! The laser beams are seriously fat and bright where they emerge from the workings and are easily visible in the night air. At the source they are discrete beams with large spaces in between, but they are set so that they merge in the distance to give the impression of a rainbow above the town of Whitley Bay.

The whole installation runs off a little on-site diesel generator and draws less than 13 amps apparently!

-Richie Burnett,
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Legit_bacon
Fri Mar 02 2012, 01:40AM
Legit_bacon Registered Member #4034 Joined: Thu Jul 28 2011, 10:41PM
Location: somewhere in the Southern hemisphere
Posts: 138
*drools*

Holy crap!!! It's genius!

Id love to get my hands on some lasers like that...
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Alex M
Fri Mar 02 2012, 02:39AM
Alex M Registered Member #3943 Joined: Sun Jun 12 2011, 05:24PM
Location: The Shire, UK
Posts: 552
No doubt there will have already been complaints to the council from miserable people.
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Marko
Fri Mar 02 2012, 03:54AM
Marko Registered Member #89 Joined: Thu Feb 09 2006, 02:40PM
Location: Zadar, Croatia
Posts: 3145
How might the yellow laser beam be produced?

Marko
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Adrenaline
Fri Mar 02 2012, 02:24PM
Adrenaline Registered Member #235 Joined: Wed Feb 22 2006, 04:59PM
Location:
Posts: 80
Copper vapor laser or Dye laser perhaps?

Probably a DPSS with a KTP crystal:

Link2

Summing two lasing frequencies of a YAG crystal, 1064nm and 1341nm
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Tetris
Fri Mar 02 2012, 04:32PM
Tetris Registered Member #4016 Joined: Thu Jul 21 2011, 01:52AM
Location: Gainesville, FL
Posts: 660
:D pretty! Gah... I want it! I notice that there isn't a true orange laser. Is it not possible to do so?
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GluD
Fri Mar 02 2012, 05:03PM
GluD Registered Member #1221 Joined: Wed Jan 09 2008, 06:17PM
Location: Odense, Denmark
Posts: 196
I could be wrong but I dont think it is a copper laser due to the statement that it all seems to run of only 13 amps. If my memory serves me right copper lasers are rather "power hungry" like argon lasers.

Dye lasers seem more realistic in my opinion. Perhaps it is all just some solid state lasers shinning through diffrend dyes to make funny colours?
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GeordieBoy
Sun Mar 04 2012, 06:08PM
GeordieBoy Registered Member #1232 Joined: Wed Jan 16 2008, 10:53PM
Location: Doon tha Toon!
Posts: 881
The laser power is 140 watts and it's all air-cooled solid-state apparently. From what I could see there's six laser boxes, each about the size of a big desktop PC case with equipment fans all along the front.

There's one laser box for each rainbow colour, except for red/cyan that both come out the top of a single box. The cyan light then goes horizontally until it is in the correct place in the rainbow before hitting another mirror and being beamed out to the horizon along with the other colours. You can see the arrangement of the laser boxes and "periscopes" in one of the pictures in the first link. There's very little in the way of support equipment - No water cooling or big generators!

The bloke there said something about combining the light from many smaller lasers to make certain colours, and said you could plug the whole lot into one socket in your house. Rather ammusingly he also told off a kid for taking off his T-shirt and throwing it up into one of the beams: "Hey, Don't do that! If the light reflects back into your eyes, that flash of light will be the last light you ever see!" What can you say? Crazy Geordies!?!? frown

-Richie,
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Adam Munich
Fri Mar 09 2012, 02:23AM
Adam Munich Registered Member #2893 Joined: Tue Jun 01 2010, 09:25PM
Location: Cali-forn. i. a.
Posts: 2242
GluD wrote ...

I could be wrong but I dont think it is a copper laser due to the statement that it all seems to run of only 13 amps. If my memory serves me right copper lasers are rather "power hungry" like argon lasers.

Dye lasers seem more realistic in my opinion. Perhaps it is all just some solid state lasers shinning through diffrend dyes to make funny colours?

Copper lasers are green too.

I'd assume it's a frequency summing system, one which cost an ungodly amount of pennies.
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