title: Highly efficient pulse cleaner via nonlinear ellipse rotation in liquid CS2 for ultrashort pulses.
abstract: A highly efficient pulse cleaner based on nonlinear ellipse rotation (NER) in a liquid medium of CS(2) is investigated for the temporal contrast enhancement of ultrashort pulses. In theory, a nonlinear transmissivity higher than 60% can be achieved with the temporal contrast improved by about four orders of magnitude, on the condition that the extinction ratio of the polarizer-analyzer pair is better than 10(4). In a proof of principle experiment, the cleaned pulses at the mJ level with total transmissivity as high as 30% are obtained via NER, in which the temporal contrast is enhanced by about three orders of magnitude. This provides a simple and feasible technology for improving the temporal contrast of an ultrashort and ultraintense laser system in the future.
authors.affiliation: State Key Laboratory of Transient Optics and Photonics Technology, Xi’an Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xi’an 710119, China. liuhongjun@opt.ac.cn
authors.forename: H J
authors.initials: HJ
authors.lastname: Liu
authors.forename: Q B
authors.initials: QB
authors.lastname: Sun
authors.forename: N
authors.initials: N
authors.lastname: Huang
authors.forename: J
authors.initials: J
authors.lastname: Wen
authors.forename: Z L
authors.initials: ZL
authors.lastname: Wang