Abstract
We propose a simple all-fiber structure based on intermodal interference
between a core and a cladding mode of an endlessly single-mode photonic crystal
fiber (PCF) section sandwiched between a lead-in and lead-out SMF-28 fiber.
We have measured the intermodal dispersion and the polarization-dependent
loss (PDL) of the structure. The sensitivities to strain, pressure, and temperature
and external refractive index are studied. The interferometer is compared
to an interferometer based on ${\hbox
{LP}}_{01}$-${\hbox
{LP}}_{02}$ SMF-28 fiber and to a PCF-based tapered LPG.
© 2009 IEEE
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