Investigation of the Newly Proposed Carrier-Envelope-Phase Stable Attosecond Pulse Source

TL;DR

This paper numerically investigates a robust method for generating carrier-envelope-phase stable attosecond pulses in the extreme ultraviolet range using undulator radiation from relativistic electron layers, predicting high-energy, stable pulses.

Contribution

It introduces a novel approach based on inverse free-electron laser-produced nanobunches for stable attosecond pulse generation with detailed optimal conditions and stability analysis.

Findings

Attosecond pulses with >45 nJ energy at 20 nm and 80 as duration predicted.

Pulses at 60 nm with >250 nJ energy and 240 as duration predicted.

Carrier-envelope-phase stability of 31 mrad and 13 mrad achieved for different wavelengths.

Abstract

Practical aspects of the robust method we recently proposed for producing few-cycle attosecond pulses with arbitrary waveform in the extreme ultraviolet spectral range are studied numerically. It is based on the undulator radiation of relativistic ultrathin electron layers produced by inverse free-electron laser process. Optimal conditions for nanobunching are given; attosecond pulse energy and waveform, and their stability are studied. For K=0.8 undulator parameter, carrier-envelope-phase stable pulses with >45 nJ energy and 80 as duration at 20 nm, and >250 nJ energy and 240 as duration at 60 nm are predicted with 31 mrad and 13 mrad phase stability, respectively.