19c96fd5174bda1ab186ece 20210415163500564 funda:funda fundamentaljournals@gmail.com WEB-FORM International Journal of Fundamental Physical Sciences IJFPS 22318186 10.14331/ijfps https://fundamentaljournals.org/index.php/ijfps/index 06 2013 3 2 Department of Physics, Islamic Azad University (IAU),Varamin, Pishva Branch, Iran Hosein Karami In this paper we described and simulated generation of blue pulse (460nm) by nonlinear KN(KNbO3) crystal ,that pumped by femtosecond diode pumped Cr:LiSAF lasers. Our simulation show that, by focusing of laser oscillator output pulses with characteristics such as 860nm wavelength, 200fs,330MHz repetition rate 14o Pico joule( PJ) energy in KN crystal with 3mm length at 22 0C by 15 mm lens in less than 20 micrometer spot size with single pass produce pulses with 42pJ energy ,425fs , 30% optical efficiency and 1% total efficiency. 06 2013 24 26 10.14331/ijfps.2013.330049 https://www.fundamentaljournals.org/index.php/ijfps/article/view/134