WISP Searches on a Fiber Interferometer under a Strong Magnetic Field

TL;DR

This paper introduces a novel fiber interferometer experiment to detect photon-axion conversion, capable of probing unexplored axion mass ranges with high sensitivity using tunable hollow-core fibers.

Contribution

It presents a new experimental setup combining fiber optics and magnetic fields to search for axions in a previously inaccessible mass range.

Findings

Proposed a fiber-based interferometer for axion detection.

Achieved sensitivity to QCD axion coupling in 28-100 meV range.

Demonstrated tunability using gas pressure in hollow-core fibers.

Abstract

A novel table-top experiment is introduced to detect photon-axion conversion: WISP Searches on a Fiber Interferometer (WISPFI). The setup consists of a Mach-Zehnder-type interferometer with a fiber placed inside an external magnetic field, where mixing occurs and is detected by measuring changes in amplitude. Hollow-core photonic crystal fibers (HC-PCF) will be used to achieve resonant mixing that is tuneable by regulating the gas pressure in the fiber. An unexplored axion mass-range (28 meV to 100 meV) can be probed reaching the two-photon coupling expected for the QCD axion.