Proposal for absolute CEP measurement using 0-to-f self-referencing

TL;DR

This paper presents a method to achieve single-shot absolute Carrier Envelope Phase (CEP) measurement by adapting a 0-f self-referencing technique with difference frequency generation, enabling precise CEP characterization of ultrashort pulses.

Contribution

The authors introduce an extension to existing 0-f self-referencing techniques that allows for single-shot absolute CEP measurement using DFG as a CEP reference.

Findings

Successful adaptation of 0-f self-referencing for absolute CEP measurement

Requires well-characterized input pulses and accurate propagation models

Enables single-shot CEP measurement for ultrashort pulses

Abstract

We show how to adapt a 0-f self-referencing technique to provide a single shot absolute Carrier Envelope Phase (CEP) measurement by using the CEP reference provided by difference frequency generation (DFG) between the spectral wings of the fundamental pulse. Usually, the beat between the input pulse and the DFG signal then provides feedback with which to stabilize the CEP slip in a pulse train. However, with a simple extension we can get a single shot absolute CEP measurement. Success relies on having well characterized input pulses, and the use of accurate propagation models through the nonlinear crystal -- these enable us to construct a mapping between the experimental measurement and the CEP of the optical pulse.