10-TW high-contrast double CPA laser system for ion acceleration

Abstract

We demonstrate an insertable pulse cleaning module (IPCM) that is connected to a commercial CPA Ti:sapphire laser system and reduces the background of amplified spontaneous emission (ASE), when the output energy and repetition rate of the original laser system is completely preserved. The ASE temporal contrast is suppressed by three orders of magnitude on the benefit of double saturable absorbers involved in the module. Our method can reform old conventional lasers into high-contrast advanced systems.