Bound modes weakly guiding fibers

The restriction 1 is of little practical concern for weakly guiding fibers. In terms of the local plane-wave vector, each bound mode field makes an angle... 

The total bound-mode power for a weakly guiding fiber of arbitrary cross-section... 

To summarize these two sections, the complete modal fields and corrected propagation constants for all bound modes of the weakly guiding circular fiber are given in Table 14-1. Consequently, for each profile considered below, we need only determine the solution of Eq. (14-4). 

In the case of weakly guiding, step-profile fibers, the power of a bound mode is given by P = al iV, where the normalization is defined in Table 14-6, page 319. Setting W= —iQ and applying the transformation of Eq. (37-71) yields... 

To construct the radiation modes of a weakly guiding, step-profile fiber of core and cladding indices and n, we start with the Tree-space solution of Eq. (25-22). When V, is expressed in cylindrical polar coordinates using Table 30-1, page 592, the only solutions which are everywhere bounded are the even and odd pair... 

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