  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.
