A modulated holding beam shining a VCSEL above threshold can improve modulation bandwidth by adjusting the semiconductor laser’s relaxation oscillation frequency. The improved modulation characteristics are accompanied by reduced damping rate. By choosing correct parameters, dynamical behavior of system and cavity solitons is changed.

In the practical application of cryogenic systems, presence thermo acoustic oscillation can cause a series adverse consequences such as pressure fluctuations, thermal leakage, structural damage, and so on. To ensure stable operation system, variable cross-section control pipe fittings are introduced, response surface analysis method is used to optimize parameter design fittings. A simulations h...

Series compensators have been used for many years, to increase the stability and load ability of transmission line. They compensate retarded or advanced volt drop of transmission lines by placing advanced or retarded voltage in series with them to compensate the effective reactance, which cause to increase load ability of transmission lines. In this paper, two method of fuzzy controller, based ...