I have attended most of the session on Nonlinear Integrated Optics, as this subject is of my primary interest. I liked the presentation given by Dr. Pasquazi on Net Parametric Gain in a High Index Doped Silica Waveguide (QWE1). The materials they used in order to obtain phase-matched four-wave mixing with a good efficiency was a special kind of glass, doped with some ions to have a nonlinear refractive index five times greater than that of SiO2, retaining at the same time the low linear and nonlinear absorption in the telecom range. … (May 20, 2010) Click here to read the complete post.