Properties of nonlinear microstructured fiber fabricated in our laboratory are theoretically analyzed using the finite element method. This fiber has a high nonlinearity and phase matching for the dispersion wave generation. To achieve all-fiber nonlinearity in microstructured fiber, the dependence of dispersion wave on the pump power is investigated. When changing the pump power at 1032 nm with a femtosecond fiber laser, the near-infrared dispersion waves cover a region from 753 to 789 nm. The central wavelength and bandwidths alter obviously, and the fiber length has a remarkable impact on pulse broadening and frequency spectrum. Results coincide with the analyses. These results could be a reference for all-fiber nonlinearity of microstructured fiber, and lay a foundation for biological and medical applications, especially some researches on the near-infrared source for nonlinear light microscopy.

This paper addresses a half distributed solid state array radar system, which uses 54 L Band power amplifier modules ( 2 0 kW output power)The total space combination power of this system can reach up to 100kw for 150 p s pulse widths at 8% average duty cycle with a 14 5% instantaneous bandwidth Switching power supply and liquid cooling have been employed to achieve good performance and stable reliability Such a system has already been utilized in a three dimensional high performance radar

The syntheses of pyridinium of 8,9,16,‐17‐tetradehydro‐6,14‐dithiono‐7,8,15,16‐tetraza‐5,13‐dioxa‐6,14‐diphospha‐dibenzo [a,h] tetradecahydroanthracene‐6,14‐dithiolate and its eleven derivatives were described. The crystal and molecular structures of the pyridinium compound and its several derivatives were also determined.