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Reversible fiber-optic switched delay module using GRIN lens fiber-optic collimators and ferroelectric liquid crystals

We have proposed for the first time, a single microbench fiber connectorized compact photonic delay line (PDL) using GRIN lens fibre optic (FO) collimators, 3D polarization optics, and ferroelectric liquid crystal (FLC) devices. Insertion losses of <7 dB were measured for both PDL settings. Important GRIN-to-GRIN coupling loss data is presented. An approach using special design non quarter pitch FO collimators is suggested for the large GRIN-to-GRIN distances in our PDL.