Title :
Frequency response and phase-shift nonlinearity of a cylindrical PVF2-film-based fiber-optic phase modulator
Author :
Sudarshanam, V.S. ; Claus, Richard O.
Author_Institution :
Bradley Dept. of Electr. Eng., Virginia Polytech. Inst. & State Univ., Blacksburg, VA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
A cylindrical coil configuration for a polyvinylidene-fluoride (PVF2)-film-based fiber-optic phase modulator is studied, focusing on the frequency response and the nonlinearity of the phase shift at the resonant frequency. This configuration, hitherto used for PVF2 film modulators, offers resonance at well-defined, controllable, and higher frequencies than possible for the flat-strip configuration. Two versions of this configuration that achieve selective mode suppression or enhancement and hence provide a choice of the resonance frequency at which a large phase shift occurs are presented. It is shown that a coil version in which the fiber loops are bonded strongly to each other leads to large reduction in the phase shift. A comparative study of the existing piezoelectric fiber-optic phase modulator designs is also presented
Keywords :
frequency response; nonlinear optics; optical fibres; optical films; optical modulation; optical polymers; phase modulation; cylindrical PVF2-film-based fiber-optic phase modulator; cylindrical coil configuration; fiber loops; frequency response; phase-shift nonlinearity; piezoelectric fiber-optic phase modulator designs; polyvinylidene-fluoride; resonant frequency; selective mode suppression; Bonding; Coils; Frequency response; Optical fiber sensors; Optical films; Optical interferometry; Phase modulation; Resonance; Resonant frequency; Voltage;
Journal_Title :
Lightwave Technology, Journal of
