"lossless" optical waveguide

[jim bell]

 On Sunday, September 8, 2019, 03:06:08 PM PDT, \0xDynamite <dreamingforward at gmail.com> wrote:
 
 
 >> In order to evaluate this as a proposed idea, a physicist would consider:
>> 1.  The loss of manufactured optical waveguides did indeed hit an
>> unexplained 'floor' in the early 1980s, about 0.16 db/kilometers of loss.2.
>> The manufacturers and users of such fibers have had a very powerful
>> motivation to figure out how to lower their loss to well below 0.16
>> db/kilometers, for nearly 40 years.3.  Nothing has yet been found, or it
>> would have been employed.4.  Photons do indeed possess an oscillating
>> magnetic field.5.  A nucleus of an isotope with 'spin' does indeed behave
>> as magnetic dipole.6.  Such a nucleus should be mechanically affected by
>> the passage of light.7.  Energy should be transferred from that light to
>> the nucleus, and thus the atom, as the light passes.8.  Removing most or
>> all atoms with an electromagnetic 'spin' should remove this loss mechanism,
>> in proportion to the amount of such isotopes remaining.
>> Do you have any other ideas as to how that loss is manifested?

>Does this suggest, then, that glass can be purified by passing it>through a magnetic field.  Perhaps during the extruding process?
>Mark
Optical waveguide is not extruded.  It is draw at high temperature, where silica is soft.  This video talks about multi-mode fiber, which is slightly different than single-mode fiber.   https://www.youtube.com/watch?v=liKOYbgIC_c    
https://www.youtube.com/watch?v=6CqT4DuAVxs


               
I don't think that drawing this with a magnetic field would assist with anything.  
         Jim Bell  
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