Phase modulation of an electro-optic polymer cladded polarization-maintaining optic fiber.
We present, for the first time based on our knowledge, a novel in-fiber optical phase modulator that is inherently broadband, efficient, and polarization-maintaining (PM). The modulator is a 25 mm long section of a D-shaped cladding PM fiber with half of its silica cladding replaced with an electro-optic (EO) silicone gel. A phase modulation of more than pi rad has been demonstrated. We describe techniques that enable the long-distance exposure of the fiber core, microfabrication of on-fiber electrodes, a low refractive index EO cladding material for replacing silica fiber cladding, and accurate phase measurement utilizing a Sagnac interferometer.
Wang
Liming
L
KVH Industries, Inc., 8412 W. 185th Street, Tinley Park, Illinois 60487, USA. lwang@kvh.com
Monte
Thomas D
TD