Multi-wavelength holography with a single Spatial Light Modulator for ultracold atom experiments

TL;DR

This paper presents a novel holography method that creates multi-wavelength light patterns using a single SLM, enabling precise control for ultracold atom experiments with minimal optical setup.

Contribution

The authors introduce a regional phase-calculation algorithm that generates a single hologram for multiple wavelengths, simplifying multi-wavelength patterning in cold atom setups.

Findings

Achieved accurate multi-wavelength light patterns within a few percent error.

Demonstrated integration into ultracold atom experiments with minimal optical access.

Validated the method with patterns at 670nm, 780nm, and 1064nm wavelengths.

Abstract

We demonstrate a method to create arbitrary intensity distributions of multiple wavelengths of light, which can be useful for ultracold atom experiments, by using regional phase-calculation algorithms to find a single hologram which is illuminated with overlapped laser beams. The regionality of the algorithms is used to program spatially distinct features in the calculated intensity distribution, which then overlap in the Fourier plane due to the dependence of diffraction angle on wavelength. This technique is easily integrated into cold atom experiments, requiring little optical access. We demonstrate the method and two possible experimental scenarios by generating light patterns with 670nm, 780nm and 1064nm laser light which are accurate to the level of a few percent.