  A polymer/liquid crystal-based fiber Bragg grating (PLC-FBG) is fabricated
with visible two-beam holography by photo-induced modulation of a
pre-polymer/LC solution infiltrated into the hollow channels of a solid core
photonic crystal fiber (PCF). The fabrication process and effects related to
the photonic bandgap guidance into the infiltrated PCF, and characterization of
the PLC-FBG are discussed. Experimental data here presented, demonstrate that
the liquid crystal inclusions of the PLC-FBG lead to high thermal and bending
sensitivities. The microscopic behavior of the polymer/liquid crystal phase
separation inside the PCF capillaries is examined using scanning electron
microscopy, while further discussed.
