Achromatic multiple beam splitting by adiabatic passage in optical waveguides

TL;DR

This paper introduces a robust, achromatic optical beam splitter using adiabatic passage in waveguides, enabling controlled light distribution across multiple channels with high efficiency.

Contribution

It presents a novel variable achromatic beam splitter design based on adiabatic passage, enhancing robustness and control in optical waveguide systems.

Findings

Achieves robust, high-efficiency beam splitting across multiple channels.

Utilizes adiabatic passage for parameter-insensitive operation.

Demonstrates controlled light intensity ratios via coupling ratios.

Abstract

A novel variable achromatic optical beam splitter with one input and $N$ output waveguide channels is introduced. The physical mechanism of this multiple beam splitter is adiabatic passage of light between neighboring optical waveguides in a fashion reminiscent of the technique of stimulated Raman adiabatic passage in quantum physics. The input and output waveguides are coupled via a mediator waveguide and the ratios of the light intensities in the output channels are controlled by the couplings of the respective waveguides to the mediator waveguide. Due to its adiabatic nature the beam splitting efficiency is robust to variations in the experimental parameters.