Compact multi-pass amplifier for chirped-pulse amplification

摘要

A compact and simple multi-pass amplifier configuration suited for chirped-pulse amplification that can fit about 16 passes is presented. This configuration uses a pair of spherical mirrors with a diameter of two inches, and a sapphire window to shift the path of the seed beam and allow easy extraction from the amplifier. We present experimental results obtained using eight passes with this configuration, together with calculations for the gain achievable with the presented configuration.