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Computer Design of Diffractive Optics by V Soifer

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8

Analysis of transverse modes of laser radiation

8.1 Propagation of electromagnetic radiation in optical waveguides

The waveguide mode is defined as a special distribution of the field which propagates along the waveguide with the preservation of a certain state of polarization, constant group velocity, and without changing the structure of its initial transverse distribution [1,2].

For multimode optical fibres there is the term mode division multiplexing (MDM), which is used for methods of compacting information channels where each spatial mode propagating in the fibre is considered as a separate channel that carries a signal [3,4].

The essence of mode division multiplexing is that with the help of laser beams which are a linear superposition ...

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