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Radium
science forum Guru Wannabe
Joined: 15 Dec 2005
Posts: 241
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 Posted: Fri Jun 16, 2006 7:06 pm Post subject:
Re: My hypothetical design of fusion-pumped lasers
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Sam Goldwasser wrote:
| Quote: | "Radium" <glucegen1@excite.com> writes:
redbelly wrote:
"redbelly" <redbelly98@yahoo.com> writes:
Antimatter is far more interesting than fusion. Fusion is boring as
hell by comparison.
Sam Goldwasser wrote:
Why? We can make antimatter in controlled quantities. We can't do the
same with fusion. :)
For that matter why not pump with solar power, produced by fusion
within the sun? The zing and excitement of nuclear fusion, delivered
directly to your front doorstep! :-)
Mark
Great idea. Problem is, it will only work during the day, and that too
the clouds shouldn't cover the sunshine.
Hopefully, lenses and crystals can be used to concentrated enough
sunlight to pump the lasing medium.
No electricity required! Well, except for the medium's atomic electrons
changing energy levels.
They tried that in the earliest days of lasers. Pumping efficiency is
terrible. The Sun doesn't know that it's supposed to concentrate the
energy in specific wavelengths convenient for laser pumpoing. :)
--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html
Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs.
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So I guess I am back at square one. IOW, use lasers pumped by
tritium-deuterium fusion. |
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Radium
science forum Guru Wannabe
Joined: 15 Dec 2005
Posts: 241
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| Posted: Fri Jun 16, 2006 7:10 pm Post subject:
Re: My hypothetical design of fusion-pumped lasers
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Lostgallifreyan wrote:
| Quote: | Sam Goldwasser <sam@saul.cis.upenn.edu> wrote in
news:6w3be59i86.fsf@saul.cis.upenn.edu:
"Radium" <glucegen1@excite.com> writes:
redbelly wrote:
"redbelly" <redbelly98@yahoo.com> writes:
Antimatter is far more interesting than fusion. Fusion is
boring as hell by comparison.
Sam Goldwasser wrote:
Why? We can make antimatter in controlled quantities. We can't
do the same with fusion. :)
For that matter why not pump with solar power, produced by fusion
within the sun? The zing and excitement of nuclear fusion,
delivered directly to your front doorstep! :-)
Mark
Great idea. Problem is, it will only work during the day, and that
too the clouds shouldn't cover the sunshine.
Hopefully, lenses and crystals can be used to concentrated enough
sunlight to pump the lasing medium.
No electricity required! Well, except for the medium's atomic
electrons changing energy levels.
They tried that in the earliest days of lasers. Pumping efficiency is
terrible. The Sun doesn't know that it's supposed to concentrate the
energy in specific wavelengths convenient for laser pumpoing. :)
Ok, so what if we convert? Solar energy to superheat water to steam, use
that to drive a turbine, store energy in a flywheel so it can be used at
nights too, then generate DC power coverted at >90% efficiency with
electronic charge pumps to provide a controlled current for lots of diodes?
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Too much electricity. I was looking for something more directly fusion
or optical.
| Quote: |
That might seem boring though, it's too close to what we do already. 
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LOL
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Radium
science forum Guru Wannabe
Joined: 15 Dec 2005
Posts: 241
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| Posted: Fri Jun 16, 2006 7:11 pm Post subject:
Re: My hypothetical design of fusion-pumped lasers
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Sam Goldwasser wrote:
| Quote: | "Radium" <glucegen1@excite.com> writes:
redbelly wrote:
"redbelly" <redbelly98@yahoo.com> writes:
Antimatter is far more interesting than fusion. Fusion is boring as
hell by comparison.
Sam Goldwasser wrote:
Why? We can make antimatter in controlled quantities. We can't do the
same with fusion. :)
For that matter why not pump with solar power, produced by fusion
within the sun? The zing and excitement of nuclear fusion, delivered
directly to your front doorstep! :-)
Mark
Great idea. Problem is, it will only work during the day, and that too
the clouds shouldn't cover the sunshine.
Hopefully, lenses and crystals can be used to concentrated enough
sunlight to pump the lasing medium.
No electricity required! Well, except for the medium's atomic electrons
changing energy levels.
They tried that in the earliest days of lasers. Pumping efficiency is
terrible. The Sun doesn't know that it's supposed to concentrate the
energy in specific wavelengths convenient for laser pumpoing.
|
Sun is mostly white light. Whats wrong with that? Is there anyway to do
purely-optical
pumping????????????????????????????????????????????????????
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Lostgallifreyan
science forum beginner
Joined: 12 Mar 2006
Posts: 11
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| Posted: Fri Jun 16, 2006 8:11 pm Post subject:
Re: My hypothetical design of fusion-pumped lasers
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"Radium" <glucegen1@excite.com> wrote in
news:1150485081.943093.187430@c74g2000cwc.googlegroups.com:
| Quote: | Sun is mostly white light. Whats wrong with that? Is there anyway to
do purely-optical
pumping????????????????????????????????????????????????????
|
Like Sam said, most laser gain stages use materials that only absorb a very
limited wavelength. There is one though, iodine, that is often chosen
because of its many lines. It will output on just as many though, given the
chance.
In the end, what you're left with is a need to convert energy efficiently.
If you can do that it doesn't matter nearly as much what form you start
with. If you want exciting lasers, with high efficiency as well as a large
possible range of output wavelengths at high power, the last thing you
should be doing is to rule out electricity, because that's the best chance
of getting them.
--
----------------------------------------
http://save.nazanin.googlepages.com/home |
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Sam Goldwasser
science forum beginner
Joined: 06 Aug 2005
Posts: 11
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| Posted: Fri Jun 16, 2006 11:23 pm Post subject:
Re: My hypothetical design of fusion-pumped lasers
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"Radium" <glucegen1@excite.com> writes:
| Quote: | Sam Goldwasser wrote:
"Radium" <glucegen1@excite.com> writes:
redbelly wrote:
"redbelly" <redbelly98@yahoo.com> writes:
Antimatter is far more interesting than fusion. Fusion is boring as
hell by comparison.
Sam Goldwasser wrote:
Why? We can make antimatter in controlled quantities. We can't do the
same with fusion. :)
For that matter why not pump with solar power, produced by fusion
within the sun? The zing and excitement of nuclear fusion, delivered
directly to your front doorstep! :-)
Mark
Great idea. Problem is, it will only work during the day, and that too
the clouds shouldn't cover the sunshine.
Hopefully, lenses and crystals can be used to concentrated enough
sunlight to pump the lasing medium.
No electricity required! Well, except for the medium's atomic electrons
changing energy levels.
They tried that in the earliest days of lasers. Pumping efficiency is
terrible. The Sun doesn't know that it's supposed to concentrate the
energy in specific wavelengths convenient for laser pumpoing. :)
Sun is mostly white light. Whats wrong with that? Is there anyway to do
purely-optical
pumping????????????????????????????????????????????????????
|
That's exactly what's wrong with it. :)
--- sam | Sci.Electronics.Repair FAQ: http://www.repairfaq.org/
Repair | Main Table of Contents: http://www.repairfaq.org/REPAIR/
+Lasers | Sam's Laser FAQ: http://www.repairfaq.org/sam/lasersam.htm
| Mirror Sites: http://www.repairfaq.org/REPAIR/F_mirror.html
Important: Anything sent to the email address in the message header above is
ignored unless my full name AND either lasers or electronics is included in the
subject line. Or, you can contact me via the Feedback Form in the FAQs. |
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