R
Radium
Guest
Hi:
What are the disadvantages of lasers when compared to LEDs?
Thanks,
Radium
What are the disadvantages of lasers when compared to LEDs?
Thanks,
Radium
E
Eric Gisse
Guest
Radium wrote:
I have an apple and an orange. Could you help me decide which is best?
P
Phineas T Puddleduck
Guest
In article <1150499871.855758.105270@g10g2000cwb.googlegroups.com>,
Eric Gisse <jowr.pi@gmail.com> wrote:
the LED is best. After all, LED's have three letters, and they're
capitals.
--
The greatest enemy of science is pseudoscience.
Jaffa cakes. Sweet delicious orangey jaffa goodness, and an abject lesson why
parroting information from the web will not teach you cosmology.
Official emperor of sci.physics. Please pay no attention to my butt poking
forward, it is expanding.
Relf's Law?
"Bullshit repeated to the limit of infinity asymptotically approaches
the odour of roses."
Eric Gisse <jowr.pi@gmail.com> wrote:
I like oranges. You can't make Jaffa Cakes out of apples. So obviously
the LED is best. After all, LED's have three letters, and they're
capitals.
--
The greatest enemy of science is pseudoscience.
Jaffa cakes. Sweet delicious orangey jaffa goodness, and an abject lesson why
parroting information from the web will not teach you cosmology.
Official emperor of sci.physics. Please pay no attention to my butt poking
forward, it is expanding.
Relf's Law?
"Bullshit repeated to the limit of infinity asymptotically approaches
the odour of roses."
S
Sam Wormley
Guest
Radium wrote:
What's the application?
R
Radium
Guest
Sam Wormley wrote:
Photonics and telecommunications
Guest
In sci.physics Radium <glucegen1@excite.com> wrote:
What kind of lasers?
What facet of photonics?
What kind of telecommunications over what distances and what kind of
information?
How long is a rope?
--
Jim Pennino
Remove .spam.sux to reply.
Ordinary LEDs or laser LEDs?
What kind of lasers?
What facet of photonics?
What kind of telecommunications over what distances and what kind of
information?
How long is a rope?
--
Jim Pennino
Remove .spam.sux to reply.
R
Radium
Guest
jimp@specsol.spam.sux.com wrote:
"laser LED"
Lasers and LEDs are two different things. There is no such thing as a
"laser LED"
Diode lasers
Huh?
Guest
In sci.physics Radium <glucegen1@excite.com> wrote:
When they first came out, they were commonly called laser LEDs.
That quickly faded and mostly they are called laser diodes reserving
the term LED for non-coherent light emitters these days.
amplification, detection, modulation and switching of light.
Photonic applications include such things as barcode scanners, laser
levels, gyroscopes, rangefinders, welders, cutters, light shows,
and holographic art to name but a few.
using satellites (high latency with satellites makes this pretty
useless for most things).
The entire planet is already pretty much networked together; what's
your point? You want more bandwidth to South Chuckupistan, lay more
fiber to replace the copper.
Laser diodes have higher output and collimate better than LEDs.
--
Jim Pennino
Remove .spam.sux to reply.
LED = Light Emitting Diode
When they first came out, they were commonly called laser LEDs.
That quickly faded and mostly they are called laser diodes reserving
the term LED for non-coherent light emitters these days.
The word "photonics" includes such things as emission, transmission,
amplification, detection, modulation and switching of light.
Photonic applications include such things as barcode scanners, laser
levels, gyroscopes, rangefinders, welders, cutters, light shows,
and holographic art to name but a few.
Impossible to do optically without laying fiber across the planet or
using satellites (high latency with satellites makes this pretty
useless for most things).
The entire planet is already pretty much networked together; what's
your point? You want more bandwidth to South Chuckupistan, lay more
fiber to replace the copper.
Laser diodes have higher output and collimate better than LEDs.
--
Jim Pennino
Remove .spam.sux to reply.
J
Jasen Betts
Guest
On 2006-06-16, Radium <glucegen1@excite.com> wrote:
also cost more
Bye.
Jasen
lasers don't come in white.
also cost more
Bye.
Jasen
L
Lostgallifreyan
Guest
"Radium" <glucegen1@excite.com> wrote in
news:1150499439.376408.142430@u72g2000cwu.googlegroups.com:
for all other reasons, but the speckle is so much a problem that LED's are
chosen instead.
Also, if you don't mind a fairly broad spectrum, it's far easier to get a
wavelength to order from LED's than from lasers.
--
----------------------------------------
http://save.nazanin.googlepages.com/home
news:1150499439.376408.142430@u72g2000cwu.googlegroups.com:
Speckle in the light. Sometimes LED's are used when you might want a laser
for all other reasons, but the speckle is so much a problem that LED's are
chosen instead.
Also, if you don't mind a fairly broad spectrum, it's far easier to get a
wavelength to order from LED's than from lasers.
--
----------------------------------------
http://save.nazanin.googlepages.com/home
P
Pooh Bear
Guest
Radium wrote:
Beware. Radium is a clueless nut who likes to talk 'scientific stuff' without
any understanding of the technology.
Graham
To do what ?
Beware. Radium is a clueless nut who likes to talk 'scientific stuff' without
any understanding of the technology.
Graham
T
Tim Williams
Guest
Sure they do. I don't see why you couldn't take, say, a free-electron laser
and modulate the wavelength fast enough from 400-700nm to make white (to the
eye, anyway). Else, mix a few monochrome lasers together.
Heh, and sunlight is suprisingly coherent, for white light: you can barely
see that "speckle" on say, your fingernail, in direct sunlight. Amazing
what 93 million miles can do, I guess...
Tim
--
Deep Fryer: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms
"Jasen Betts" <jasen@free.net.nz> wrote in message
news:1b5e.44939e9e.9beb2@clunker.homenet...
and modulate the wavelength fast enough from 400-700nm to make white (to the
eye, anyway). Else, mix a few monochrome lasers together.
Heh, and sunlight is suprisingly coherent, for white light: you can barely
see that "speckle" on say, your fingernail, in direct sunlight. Amazing
what 93 million miles can do, I guess...
Tim
--
Deep Fryer: a very philosophical monk.
Website: http://webpages.charter.net/dawill/tmoranwms
"Jasen Betts" <jasen@free.net.nz> wrote in message
news:1b5e.44939e9e.9beb2@clunker.homenet...
R
Radium
Guest
Tim Williams wrote:
be the size of diode lasers?
I wonder why free-electron lasers have to be so large. Why can't they
be the size of diode lasers?
P
Pooh Bear
Guest
Radium wrote:
*anyone* could make them but that would spoil research funding.
Graham
It's a conspircay to keep the funds flowing to academic institutions. In reality
*anyone* could make them but that would spoil research funding.
Graham
Guest
In sci.physics Radium <glucegen1@excite.com> wrote:
If you couped them up in a small place, they wouldn't be free, would
they?
--
Jim Pennino
Remove .spam.sux to reply.
Its the same as the problem with free range chickens.
If you couped them up in a small place, they wouldn't be free, would
they?
--
Jim Pennino
Remove .spam.sux to reply.
L
Lostgallifreyan
Guest
jimp@specsol.spam.sux.com wrote in news
4odm3-4dr.ln1@mail.specsol.com:
--
----------------------------------------
http://save.nazanin.googlepages.com/home
4odm3-4dr.ln1@mail.specsol.com:Oh, the appliance of science! >
--
----------------------------------------
http://save.nazanin.googlepages.com/home
B
Bill Janssen
Guest
Radium wrote:
Bill K7NOM
P
Pooh Bear
Guest
Bill Janssen wrote:
Graham
How did you manage to introduce html formatting using Gecko/Netscape 7.2 ?
Graham
Guest
In sci.physics Pooh Bear <rabbitsfriendsandrelations@hotmail.com> wrote:
--
Jim Pennino
Remove .spam.sux to reply.
And more to the point, *WHY*?
--
Jim Pennino
Remove .spam.sux to reply.
B
Boris Mohar
Guest
On 17 Jun 2006 08:33:22 -0700, "Radium" <glucegen1@excite.com> wrote:
--
Boris Mohar
--
Posted via a free Usenet account from http://www.teranews.com
http://www.motionmountain.dse.nl/welcome.html
--
Boris Mohar
--
Posted via a free Usenet account from http://www.teranews.com