17 April 2006 Double-clad fibre numerical optimization with a simplex method
Author Affiliations +
A simulation-based numerical optimization method for double-clad fibres (DCFs) is presented. The technique seeks to determine the cross sectional design that offers the strongest absorption. An encoding key that transforms the twodimensional cross section into a single point in a multi-dimensional space has been developed. The coordinates of the referred point are treated as the variables of an equation-free objective function and the Nelder-Mead algorithm is deployed to search for the function minimizer which is not always found but the function is always minimized substantially. The coordinates of the minimizer or the point delivering the best performance amongst the simplex vertices is decoded to unfold the optimized cross section. During the optimization process, the evaluation of the objective function is treated as a moving boundaries problem and is addressed via an efficient numerical simulation technique operating in the geometrical optics domain. Various optimized cross section designs are generated and compared. The optimum designs are those of a spiral inner cladding with an offset core and a circular one with four embedded birefringence rods with optimized offsets. The concept of improving the multidimensional landscape instead of improving the direct search method itself increases the agility of the polytope and generates more imaginative cross sections with improved absorption characteristics.
© (2006) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Ioannis Dritsas, Ioannis Dritsas, Tong Sun, Tong Sun, Kenneth T. V. Grattan, Kenneth T. V. Grattan, } "Double-clad fibre numerical optimization with a simplex method", Proc. SPIE 6190, Solid State Lasers and Amplifiers II, 61900L (17 April 2006); doi: 10.1117/12.661983; https://doi.org/10.1117/12.661983


Highly efficient Yb free Er La Al doped ultra low...
Proceedings of SPIE (March 10 2016)
Superfluorescence three-level neodymium-doped fiber source
Proceedings of SPIE (October 20 2004)
New inner cladding shape for high power double clad fiber...
Proceedings of SPIE (September 04 2002)
Yb3+ doped double clad fiber laser with novel shape of...
Proceedings of SPIE (April 04 2002)
Spinning disk solid-state lasers, computer simulation
Proceedings of SPIE (February 21 2006)
Optimum design of DBR Er Yb co doped double cladding...
Proceedings of SPIE (November 16 2010)

Back to Top