Low frequency-to-intensity noise conversion in a pulsed laser cavity locking by exploiting Carrier-Envelope Offset manipulation

TL;DR

This paper investigates how manipulating the Carrier-Envelope Offset frequency in a pulsed laser cavity can reduce low-frequency noise conversion, enhancing laser stability when locked to a high-finesse resonator.

Contribution

It introduces a method to optimize laser noise suppression by adjusting cavity finesse and CEO frequency, supported by theory, simulations, and experiments.

Findings

Optimized noise suppression through CEO frequency manipulation.

Theoretical and numerical models match experimental results.

Significant reduction in laser intensity fluctuations achieved.

Abstract

We report on the dependence of the frequency-to-intensity noise conversion in the locking of an ultrafast laser against a high-finesse optical resonator from the Carrier Envelope Offset (CEO) frequency. By a proper combination of the cavity finesse and laser CEO frequency it is possible to optimize the signal-to-noise ratio of the laser intensity trapped into the optical resonator. The theoretical description of the problem together with the numerical simulations and experimental results are presented with the aim of a strong suppression of the intensity fluctuations of the trapped laser field.