Re: how the laser happened

john larkin <jl@650pot.com> wrote:

On Sun, 23 Jun 2024 16:39:56 -0000 (UTC), Cursitor Doom
<cd999666@notformail.com> wrote:
 

On Sun, 23 Jun 2024 05:03:34 GMT, Jan Panteltje wrote:
 

On a sunny day (Sat, 22 Jun 2024 17:23:40 -0000 (UTC)) it happened
Cursitor Doom <cd999666@notformail.com> wrote in
<v571as$3rs0j$2@dont-email.me>:
 

On Sat, 22 Jun 2024 06:19:49 GMT, Jan Panteltje wrote:
 

On a sunny day (Fri, 21 Jun 2024 11:32:56 -0700) it happened john
larkin <jl@650pot.com> wrote in
<1ghb7jt3882078r19n6jjgtirv25q27805@4ax.com>:
 

On Fri, 21 Jun 2024 17:56:36 +0100, Cursitor Doom <cd@notformail.com>
wrote:
 

On Fri, 21 Jun 2024 06:05:21 -0700, john larkin <jl@650pot.com>
wrote:
 

There was a thread somewhere above about photon wave/particle
duality.
 
 
This is worth reading:
 
https://www.amazon.com/How-Laser-Happened-Adventures-Scientist/dp/

0195153766

 
Einstein, in one of his fits of genius, predicted in around 1916
that under the right conditions, a photon could pass by an excited
atom and the atom would kick in another photon, or add to the wave
amplitude, depending on how you feel about these things. He called
it stimulated emission. He also declared that the laws of
thermodynamics made this effect impossible to use in practical
situations.
 
In 1951, Charles Townes invented a work-around trick and built the
maser, a gaseous microwave oscillator. His superiors thought he was
crazy to dispute Einstein and almost threw him out of grad school,
but it worked.
 
In 1960, Theodore Maiman at HRL made the first ruby laser, and Bell
Labs soonafter made a HeNe.
 
What's interesting is that any decent neon sign shop could have
built a HeNe laser in 1920.
 
HRL sounds like a very cool place, up in the hills above Malibu.

 
Wasn't that where Jane Mansfield used to go out bathing?
 
 

Keep your mind on electronics, young man.
 
The Getty Museum is in Malibu. Go there if you can. Hearst Castle,
too,
up the road a bit.

 
I've been to Malibu, even did some work there...
Did not go to any museum, but did go to the beach.

 
Did you see Jane? What about lobsters? Any lobsters around?

 
Na, but some other beatiful women I met.
Last time we went looking for edible seaweed ...

 
Argh! Never mind. I believe Jane had terrible problems with lobsters when
she went out bathing in Malibu. But you don't know anything about that,
clearly. It obviously wasn't publicised in Holland.

 
This thread is about lasers, not lobsters.
 
 

Well, Schawlow famously said, “Anything will lase, if you hit it hard
enough.”

I expect that includes lobsters.

Cheers

Phil Hobbs

--
Dr Philip C D Hobbs  Principal Consultant  ElectroOptical Innovations LLC /
Hobbs ElectroOptics  Optics, Electro-optics, Photonics, Analog Electronics