How to get 1 or 2Km of optical fiber?

David Landry dlandry at
Mon Mar 18 09:49:20 MDT 2013

You could use either. What will really dictate which you use is based on
the transmitter/receivers that you couple into them.

One of the big advantages of single-mode over multi-mode is not having to
worry very much about mode dispersion. Lower dispersion means longer runs
before needing any sort of special dispersion correcting devices.

The trade-off is a single-mode fiber has much lower bandwidth available.
Using WDM, a multi-mode fiber can easily transmit 20+ channels at 20 to 40
Gb/s per channel. Single-mode is essentially a single channel.

David Landry

On Mon, Mar 18, 2013 at 9:38 AM, Michael Torrie <torriem at> wrote:

> On 03/18/2013 08:24 AM, David Landry wrote:
> > Unjacketed fiber is commonly sold in spools between 10km and 50km. That
> > would require you to jacket them and connectorize them yourself. I also
> ran
> > across jacketed, pre-terminated spools here:
> >
> So does anyone know what fiber one would use for a short link, say 250
> meters or so?  Multimode or singlemode?  Singlemode is slightly cheaper
> and has no significant bandwidth cap on it.  But I can't get a clear
> answer on the interwebs as to which kind is best to use for what.
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