RT - Journal Article T1 - Generation of an isolated attosecond pulse by optimizing the laser field by applying a linear phase compensation to the three color laser field JF - opsi YR - 2017 JO - opsi VO - 23 IS - 0 UR - http://opsi.ir/article-1-1196-en.html SP - 53 EP - 56 K1 - attosecond pulse K1 - High harmonic generation K1 - isolated pulse. AB - In this paper we simulate the generation of an isolated attosecond pulse by solving the time dependent 1D SchrÓ§dinger equation for single Helium atom, and by using the one color, two color and three color laser field ,we generate the high harmonic spectrum and compare them with each other. Then by adding a linear phase compensation to the three color laser field and gaining the suitable phase control factor we investigate the best way to generate these ultra-short pulses in Helium atom. By superposing several harmonics in cut off vicinity, we obtain an isolated 76 attosecond pulse. LA eng UL http://opsi.ir/article-1-1196-en.html M3 ER -