Chirp-compensated pulsed titanium-sapphire laser system for precision spectroscopy

TL;DR

This paper demonstrates active frequency-chirp compensation in a pulsed titanium-sapphire laser system, significantly enhancing spectral resolution and stability for high-precision VUV spectroscopy.

Contribution

It introduces intra-cavity electro-optic modulation for active chirp compensation, achieving ultra-low frequency uncertainty in pulsed laser spectroscopy.

Findings

Improved spectral resolution and stability in pulsed Ti:Sapphire lasers.

Achieved frequency uncertainty of 5×10⁻¹¹ in VUV spectroscopy.

Enhanced precision in frequency up-conversion measurements.

Abstract

Active frequency-chirp compensation for a narrowband pulsed Titanium-Sapphire laser system is demonstrated using an intra-cavity electro-optic modulator resulting in improved spectral resolution and stability. With referencing to an optical frequency comb and further residual frequency chirp detection from shot-to-shot measurements, the resulting laser pulses are frequency up-converted for high-precision spectroscopy measurements in the VUV regime, where the relative uncertainty contribution due to frequency chirp is pushed to the $5 \times 10^{-11}$ level.