The tunable,coherent terahertz wave generation in a variety of isotropic semiconductor nonlinear crystals,such as Ⅲ-Ⅴ and Ⅱ-Ⅳ compounds,by difference frequency mixing is studied theoretically based on the theory of the cross-Reststrahlen band dispersion compensation phase-matching.
Based on the general theories of linearly chirped fiber Bragg grating, some parameters were analyzed including different chirp values and quasi gauss coupling function relating with the reflectivity coefficient and chromatic dispersion compensation. The result shows that selecting larger chirp and appreciated quasi gauss coupling function could improve the chromatic dispersion compensation while keeping the reflectivity value larger.
Dispersion of Fresnel waveguides has been analyzed with transfer matrix. The results show that the dispersion depends on wavelength,width of waveguide and difference of refractive index. So the feasible applications of Fresnel waveguides in dispersive compensation have been pointed out.
Fiber-based dispersion compensators or dispersion compensating fibers have also become one of the most essential optical components that support high-speed large capacity optical transmission.
Very recently, the dispersion compensating fibers have further evolved into dispersion-managed optical transmission lines, which are now being actually deployed in transoceanic submarine optical cable networks.
When the first dispersion compensating fiber modules were introduced to the
Dispersion compensating fibers (DCF) are the most widely used technology for
Dispersion compensating fiber used as a transmission fiber: inverse/reverse dispersion fiber