nanowires. From Figure 20.60 we see that if one uses a nonlinear-induced phase-
shift of 3/2 as a rough benchmark for nonlinear device performance, then for two
common ChG, usable phaseshifts can be achieved at this intensity for waveguide
lengths of a few tens of centimeters, with a propagation loss requirement of
<0.1 dB/cm. While these are certainly challenging requirements they are not
beyond the realm of feasibility given the great strides that have been made in
nonlinear glass waveguide fabrication over the past few years [18].
20.12 CONCLUSIONS
In conclusion, we have reviewed some of the recent progress on all-optical nonlinear
signal processing devices over the past few years that relates to both ChG (in fiber
and waveguides) and HNLF, usin ...