Limitations to bit-rate and spatial capacity of an optical data transmission channel

Details Limitations to bit-rate and spatial capacity of an optical data transmission channel Limitations to bit-rate and spatial capacity of an optical data transmission channel

2002-06-13

arxiv.org/abs/physics/0206035v1

Physics

Optics

3 pages, 3 figures, Revtex

Scientific paper

The maximum bit-rate of a slab waveguide is ultimately determined by the waveguide dispersion. We show that while the maximum bit rate in a waveguide is inversely proportional to the waveguide's width, bit rate per unit width (i.e., spatial capacity) decreases, and in the limit of a zero-width waveguide it converges to a value, which is independent of the waveguide's refractive indices. This value is qualitatively equivalent to the transmission rate per unit of width in free space. We also show that in a 3D waveguide (e.g., fibers), unlike free space, the spatial capacity vanishes in the same limit.

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