# Integer Multiplier for Orbital Angular Momentum of Light using Circular-Sector Transformation

## TL;DR

This paper introduces an efficient method to multiply the orbital angular momentum of light using circular-sector transformations, achieving higher accuracy with a simple setup involving a single spatial light modulator.

## Contribution

It presents a novel integer multiplier for OAM of light based on parallel circular-sector transformations, improving accuracy over previous methods.

## Key findings

- Conversion accuracy of OAM doubler and tripler is significantly improved.
- Method uses a single spatial light modulator for implementation.
- Potential applications in spatial mode manipulation of OAM and other modes.

## Abstract

This paper describes an integer multiplier for the orbital angular momentum (OAM) of light through the parallel implementation of multiple circular-sector transformations, whereby the cross-sectional circular shape of the OAM mode is geometrically transformed to the circular-sector shape. Experiments show that the conversion accuracy of both OAM doubler and tripler formulations is significantly better than that of the previous method. This is because the proposed method uses a simple implementation with a single spatial light modulator. The proposed method has strong potential for the spatial mode manipulation of OAM and other useful spatial modes.