101–108 of 108 posts
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Not sure how applicable it is, but the IrDA (Infrared Data Association) protocol tops out at only 16Mbps.
It's not applicable. 40Gbps over fiber is ordinary. 40Gbps per wavelength, not per fiber. Many times 40Gbps over one fiber.
10/25/50/100 are the common rates in real-world Ethernet PHY standards.
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Only if you consider 70% or so to be close. There's some room for improvement over copper wires. Now, if there are any physicists here who want to jump in, I have a question about that. I heard waveguides are dispersive, would sending pulses of light through tiny channels slow it down as well?
Not a physicist, but you may want to look for 'hollow core fiber / photonic crystal fiber'. Where some are said to reach up to 99.x % the speed of light in a vacuum.
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You don't need to know the details of a brain cell to get the analogy. If I say "transistor" to my mom, she wouldn't be able to tell me what it is. If I say "It's like the brain cells for the computer", she would probably understand that "Ah, so a computer has many transistors that helps it think", which seems good enough for an article with a broad audience. > I would bet that more people know what a transistor is t…
But does your mother read Wired?
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Not a physicist, but you may want to look for 'hollow core fiber / photonic crystal fiber'. Where some are said to reach up to 99.x % the speed of light in a vacuum.
Laser physicist here, did some work with PCF: Expensive as fuck, highly polarization dependent, almost impossible to splice.
Most fascinating thing i've read years ago they'd be the prime candidate for manufacturing in space, because real vacuum.
Gaaah, please stop advertising optical computers as the technology that will overcome Moore's law. It makes no effing sense. Wavelength of the light emitted by these devices: ~4000nm Latest generation commodity CPU transistor structure size: 7nm Add to that that photons really don't like being trapped; you essentially need a delay line and optical amplifier to hold them indefinitely (that's essentially the core techn…
I will be pedantic but there is no light at 4000nm. Light is by definition the radiation that is considered from the point of view of its ability to excite the human visual system (HVS). The HVS sensitivity, as given in ASTM E308-15 practise, is in range [360, 780]nm.
In the optics community we usually consider everything we can manipulate with refractive optics as "light" – and yes, I am fully aware that this goes down well into what's considered microwave radio.
My personal cutoff for where optics begins is, where I no longer can use an antenna that is part of a resonant _circuit_ to emit / receive the radiation, and have to resort to quantum mechanical state transitions.
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Laser physicist here, did some work with PCF: Expensive as fuck, highly polarization dependent, almost impossible to splice.
Nonetheless it feels like at least every few months or even weeks a new announcement appears in pop-science sites like eurekalert and phys.org. Feels a little bit like the always around the corner next big battery tech. Most fascinating thing i've read years ago they'd be the prime candidate for manufacturing in space, because real vacuum.