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The laser points at the Galactic Center of the Milky Way, our galaxy

Brenner

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"The bright object at center is Jupiter, while the other is Antares"

Let's discover what nm or/and what type of laser do they use with these monster telescopes.

Pointing at Galactic Center of the Milky Way is not a joke.



Are there any Astronomers here?

Picture, some quoted text from space.com

:beer:
 
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Blord

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Great picture ! I always love astronomy photo's.

You know that at center of the Milky Way there is a supermassive black hole. The laser disturb it and now it is looking for us.... :D
 

DrSid

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What I could find:

Wavelength: 589nm
Power: 16-20W CW
Type: dye, pumped with Argon or 532nm Verdi V2 laser (looks like DPSS)
Aperture size: 50cm

There are some interesting PDFs if you google for 'vlt guide laser power'.
 
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Brenner

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What I could find:

Wavelength: 589nm
Power: 16-20W CW
Type: dye, pumped with Argon or 532nm Verdi V2 laser (looks like DPSS)
Aperture size: 50cm

There are some interesting PDFs if you google for 'vlt guide laser power'.
Now , I wonder if pilots have a special instruction how to avoid flying over these telescopes.

Imagine 20W hitting the aircraft.

:undecided:
 

Blord

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20 Watt across a beam of 50cm isn't much power density. It is more like a lighthouse on seashore.
 

Brenner

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20 Watt across a beam of 50cm isn't much power density. It is more like a lighthouse on seashore.
You think that 20W hitting the cockpit wouldn't distract the pilot flying an aircraft ?

Hmm interesting
 

DrSid

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To hell with pilots .. such plane would RUIN TEH PICTURES !
 

Blord

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The laser isn't following the aircraft. Imagine the aircraft is moving with a speed of 600mile/hour though the beam of 50cm at 30.000feet. And the pilot is watching right at the source of the beam. How long would be an eye in the laserbeam ?

***edit*** correct 600Mil/sec to 600Mil/hour :D
 
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123splat

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The laser isn't following the aircraft. Imagine the aircraft is moving with a speed of 600mile/sec though the beam of 50cm at 30.000feet. And the pilot is watching right at the source of the beam. How long would be an eye in the laserbeam ?
600 mi/sec?? at that velocity, the pilot wouldn't even notice the beam.
 

DrSid

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Actually it seems there is special camera which watches for air traffic .. and shuts down the beam automatically. One PDF mentions this, but it's very vague.
 

DrSid

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Btw. that laser table .. what is it ? While it has some orange laser in it, I doubt it is the VLT guiding laser, as that one is supposed to be a lot larger .. and this also does not look like 20W.

Edit: my bad .. it seems it really is exactly the laser .. http://www.mpe.mpg.de/ir/parsec/lab.php
 
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electron

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@weeba2kv

Thanks for posting that pic of the Coherent Laser setup, that is a really awesome looking. :beer:
 




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