The amplifying dynamics of the pulse burst in Yb3 -doped fiber amplifier (YDFA) with high-power pulse pump is numerically analyzed by a finite-difference time-domain (FDTD) method. The numerical simulations show that the amplitude uniformity of the amplif
A finite element method computation model for analyzing optothermal interaction of polychromatic light and biology tissue is proposed and proven by experiment. A continuous xenon lamp is employed as an example. First, the spectral energy distribution of t
Based on the theory of dispersion characteristics of double-ring photoelectric oscillator and chirped grating, a broadband ultra-low phase noise spectral frequency shift system is constructed. Firstly, the mathematical model is discussed. Secondly, accord