How to get 1 or 2Km of optical fiber?

David Landry dlandry at byu.net
Mon Mar 18 11:18:12 MDT 2013


On Mon, Mar 18, 2013 at 10:15 AM, Steve Alligood <steve at betterlinux.com>wrote:

> naw, you can get 32+ colors on a pair of single mode fiber, it just isn't
> cheap and has problems with different colors at different distances.
>

Maybe you can, but a single mode waveguide is designed to allow propagation
of a single mode at a particular wavelength. That wavelength of that mode
can be adjusted by changing core diameter and the index of refraction
profile [0].

I suppose you could couple other wavelengths into an evanescent mode along
the cladding over a short enough distance, though. Are you referring to
some particular product?

---
David Landry

[0] Single mode transmission happens at V < 2.4 (
http://en.wikipedia.org/wiki/Normalized_frequency_(fiber_optics))


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