Old 03-19-2017, 09:51 AM #145
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Default Re: Videos from youtube you wish to share.

Interesting photon entanglement video, just the basics of a technique using non-linear crystals to make them:



Interesting; observation reduces entropy:



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Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.

Last edited by Alaskan; 03-19-2017 at 01:27 PM.
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Old 03-19-2017, 07:54 PM #146
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Default Re: Videos from youtube you wish to share.

Thanks for sharing Alaskan. This is something I need to watch for my work.
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Old 03-20-2017, 11:29 AM #147
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Default Re: Videos from youtube you wish to share.

First time I've come across that idea, interesting... I will be pondering upon this for some time to to come.

Found another interesting video, I guess this means I'm still a kid after all, and and old man.

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To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.
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Old 03-20-2017, 05:37 PM #148
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Default Re: Videos from youtube you wish to share.

New toy

https://www.youtube.com/watch?v=ZzkEZHuW4dE



Nice little DPSS YAG



These are based on what is in the Operation Manual for the 221-1064-VO1 and 221-1064-VO2, and the Operation Manual for the 221-1064-VO4. They may not apply exactly to other versions. The laser I tested was actually a 221-1064-VO4.

Performance

Laser gain medium: Nd:YAG.
Wavelength: 1,064 nm.
Operational modes: CW, internal and external modulation.
Modulation contrast ratio: 5:1 (VO1), 100:1 (VO2). 4:1 (V04).
Modulation switching time: less than 11 nm, rise or fall (10 to 90 percent).
CW power: 10 watts (VO1), 7.5 W (VO2), 6 to 10 W (V04).
Closed loop power stability (VO4): 2% in 10 minutes.
Amplitude noise (VO1 and VO2): Less then 1% rms (2 seconds to 8 hours), less than 0.3% rms (0.5 Hz to 300 MHz); (VO4): Less than 1% rms (10 Hz to 3 MHz).
Warmup (cold start-AC on): 25 minutes.
Warmup (warm start-standby): 2 minutes.
Beam parameters

Beam diameter: 2.15 +/- 0.05 mm at 20 cm in front of laser.
Beam divergence: Less than 2 mR.
Beam waist location: +/- 30 cm from a point 20 cm in front of laser.
Beam pointing accuracy: Cone angle from normal of 0 to 4 minutes of arc
Polarization ratio: 100:1 vertical within +/-2 deg.
Confocal parameter (VO1 and VO2): Less than 1.2 times diffraction limited; (VO4): Less than 1.18.
Ellipticity: Less than 12% (VO1 and VO4) or 15% (VO2).
Astigmatism (VO4): Less than 15% of 2ZR.
Beam static alignment angle: +/- 0.4 mR.
Beam static alignment position: +/- 0.89 um.
Laser head

Size: 5.5" x 3.4" x 18.5".
Weight: 9 kg.
Power unit

Power input: 90 to 285 VAC, 50 or 60 Hz, 300 W max.
Size: 19" x 3.5" rack mount.
Weight: 3.5 kg.
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To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.

Last edited by Alaskan; 03-20-2017 at 07:16 PM.
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Old 03-21-2017, 07:32 AM #149
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Default Re: Videos from youtube you wish to share.

First Laser:

https://www.youtube.com/watch?v=Ulg_SP7HDXw

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RHD's Relative Perceived Brightness Calculator. Compare brightness @nm: http://lsrtools.1apps.com/relativebrightness

To shorten my signature I have moved most of my laser related web links to this forum page, the second post in that thread shows most of my builds... Alaskan's Laser Links: http://laserpointerforums.com/f44/al...ml#post1449395


Sincerely investigate any of these three short quotes as new concepts and you've taken your first step into a larger world:

"I regard consciousness as fundamental. I regard matter as derivative from consciousness..." - Max Planck. "Everything we call real is made of things that cannot be regarded as real" - Neils Bohr. "What we call physical things and events do not exist independently of subjective experience..." - Deepak Chopra.

Each of these three rabbit holes go deep, ending up in the same place.

Useless troll fighting.
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Old 03-21-2017, 09:58 PM #150
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Default Re: Videos from youtube you wish to share.

Everyone here should watch this Waves: Light, Sound, and the nature of Reality !

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