Fiber Frequency Shifter with Broad Bandwidth, High Conversion Efficiency, Pumpand Pump ASE Cancellation, and Rapid Tunability for WDM Optical Networks

摘要

Theoretical and experimental results on a 1-THz fiber frequency shifter with highconversion efficiency, pump and pump ASE cancellation, and rapid tunability for use in a wavelength division multiplexed communication network is presented. Observations regarding the use of advanced computational fluid dynamics (CFD) analysis, sensitivity analysis (SA), and design codes in gradient-based multidisciplinary design optimization (MDO) reflect our perception of the interactions required of CFD and our experience in recent aerodynamic design optimization studies using CFD. Sample results from these latter studies are summarized for conventional optimization (analysis-SA codes) and simultaneous analysis and design optimization (design code) using both Euler and Navier-Stokes flow approximations. The amount of computational resources required for aerodynamic design using CFD via analysis-SA codes is greater than that required for design codes. The suggested MDO formulation is a hybrid multilevel optimization procedure that consists of both multipoint CFD analysis-SA codes and multipoint CFD design codes that perform suboptimizations.