This situation induces substantial polarization dependent loss and a large fiber coupling loss for TM wave.
Therefore, the conclusion is that in cases where the internal damping loss factors are large with respect to the coupling loss factors, it is necessary to obtain more accurate estimates for the internal damping loss factors than are found with simple reverberation time measurements of plates.
While mode coupling loss cannot be eliminated due to the large difference between the fiber and active region dimensions of the WG QD-EAM, it can be optimized through proper waveguide design [34].
These examples illustrate the potential of the estimated CLFs to solve larger problems with SEA and show the influence of the type of excitation on the coupling loss factor estimation.
In summary, the indirect coupling loss factors are zero, so that a proper-SEA model can be formed, either if all the system modes are local or in the weak coupling regime as the modal overlap becomes large.
The minimum insertion loss including the transmission loss and coupling loss is about 10.7 dB.
And the coupling loss is insensitive to tilt angle.
Some large errors were obtained but these were due mainly to the omission of airborne flanking paths from the SEA model or due to the breakdown of the theory for specific coupling loss factors.
Comparisons are drawn between the transient coupling loss factors and the steady-state coupling loss factor of classical SEA.
