Luus-Jaakola optimization procedure for phase-only sampled-fiber Bragg gratings.

We describe a Luus-Jaakola (LJ) optimization algorithm approach for the design of wavelength division multiplexing (WDM) optical communication systems by using phase-only sampled-fiber Bragg gratings. The LJ method is used to optimize the phase grating as well as the number of segments which form the grating. The numerical example of WDM is studied. The method is easily applicable and shows promising results with low refractive index modulation.

Genetic Algorithm Approach to the Determination of Particle Size Distributions from Static Light-Scattering Data.

The application of genetic algorithms to the inversion of static light-scattering (SLS) measurements is investigated. The approach is illustrated using simulated data on samples with unimodal, bimodal, and trimodal distributions of spherical particles. Particles having diameters in the range from 100 to 4000 nm are treated. Results are compared with other inversion procedures. It is found that genetic algorithms yield very good results in this situation. Copyright 2001 Academic Press.