Photonic Lantern
Sergio Leon-Saval, Alexander Argyros, Joss Bland-Hawthorn

TL;DR
Photonic lanterns enable efficient conversion between multimode and single-mode waveguides, facilitating the integration of single-mode photonic technologies into multimode systems, with various designs and practical applications explored.
Contribution
This review provides a comprehensive overview of the theory, variants, and applications of photonic lanterns, highlighting recent advancements and potential uses.
Findings
Different variants of photonic lanterns are discussed.
Photonic lanterns have diverse applications in photonics.
Theoretical understanding of photonic lantern operation is summarized.
Abstract
Photonic lanterns allow for a low-loss transformation of a multimode waveguide into a discrete number of single-mode waveguides and vice versa, thus, enabling the use of single-mode photonic technologies in multimode systems. In this review, we will discuss the theory and function of the photonic lantern, along with several different variants of the technology. We will also discuss some of its applications in more detail.
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