We present the construction of photonic crystal in-fiber devices. The presented devices include modulators and spectral filters. The manufacturing process related to the fabrication of these devices includes two building stones. The first one is the insertion of microwires into one of the capillaries of the photonic crystal fiber and the second one is the twisting of the fibers while drawing. Combining both technologies may yield the realization of an in-fiber solenoid that could be used for generation of in-fiber magnetic fields. We present the fabrication of the suggested devices as well as their experimental characterization.