Multiple Side-Band Generation for Two-Frequency Components Injected into a Tapered Amplifier

TL;DR

This paper experimentally investigates how multiple side-band generation in a tapered amplifier affects atomic laser cooling, analyzing various parameters and demonstrating its impact on trapping efficiency for potassium isotopes.

Contribution

It introduces a detailed experimental analysis of side-band generation effects in tapered amplifiers for two-frequency laser cooling applications.

Findings

Side-band generation significantly influences atom trapping efficiency.

Experimental parameters like frequency difference and amplifier current affect side-band formation.

Small frequency differences lead to notable effects on laser cooling outcomes.

Abstract

We have experimentally studied the multiple side-band generation for two-frequency components injected into a tapered amplifier and demonstrated its effects on atomic laser cooling. A heterodyne frequency-beat measurement and a Fabry Perot interferometer have been applied to analyze the side-band generation with different experimental parameters, such as frequency difference, injection laser power and tapered amplifier current. In laser cooling potassium40 and potassium41 with hyperfine splitting of 1.3GHz and 254MHz, respectively, the side-band generation with a small frequency difference has a significant effect on the number of trapped atoms.