“…The dispersion effect is represented in the form of the third derivative with coefficient in the resultant KZK Eq. (102) and obtained by introducing the bubble oscillation [10] , [93] , [25] , [26] , [28] , [29] , [27] , [115] , [88] , [114] , [95] , [89] , [90] , [91] , [92] , [94] , [102] , [103] , [113] . By the dispersion effect, the propagation speed of waves shifts depending on the frequency of each wave.…”