Timeline for Would optical signal processing still suffer from slew rate?
Current License: CC BY-SA 3.0
11 events
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| Nov 18, 2015 at 20:44 | comment | added | JimmyB | I think I got one more point: For electrons to propagate a wave, the electrons have to move back and forth, i.e. they need to be accelerated and decelerated continuously. Accelerated charges dissipate some of their kinetic energy as e-m radiation. Now light (photons) are not charged, and they are not accelerated/decelerated during transmission, and they don't radiate anything while they are not accelerated. Hence I doubt that induction and capacitance can be transferred to light in a sensible way. That's why I'd say there's no slew for light. Except maybe for the wavelength as limiting factor. | |
| S Nov 14, 2015 at 16:22 | history | suggested | texnic | CC BY-SA 3.0 |
Hyperlinked slew rate to Wikipedia article
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| Nov 14, 2015 at 16:19 | answer | added | texnic | timeline score: 1 | |
| Nov 14, 2015 at 16:11 | review | Suggested edits | |||
| S Nov 14, 2015 at 16:22 | |||||
| Nov 13, 2015 at 21:03 | comment | added | MarkU | Perhaps the answer is in the difference between a beam of light and an electric current - one is a wave with transverse E-H fields, and the other is more like a pressure wave propagating through a cloud of electrons. I still can't help thinking there's no free lunch, but I'm not sure how to prove it in this case. | |
| Nov 13, 2015 at 20:56 | comment | added | MarkU | @hannobinder True, slew rate and propagation speed are different effects, but slew rate is directly related to capacitance. I don't see how light could avoid the dielectric material's effect on the wave's electric field. | |
| Nov 13, 2015 at 20:47 | comment | added | JimmyB | @MarkU I don't think that slew rate and propagation speed are directly related. | |
| Nov 13, 2015 at 20:30 | comment | added | MarkU | Isn't light an electro-magnetic wave? Speed of light (in material) is still affected by dielectric material E0 and magnetic permeability mu0. So there is still an equivalent slew rate. | |
| Nov 13, 2015 at 18:35 | comment | added | user59864 | You still need to convert between optical end electrical and there lies the problem. | |
| Nov 13, 2015 at 18:19 | comment | added | Dave Tweed | You might want to ask this question on Physics.SE... | |
| Nov 13, 2015 at 18:14 | history | asked | NCL | CC BY-SA 3.0 |