This thesis explores the use of optical fibers to make high precision measurements of effects due to gravitational fields. In particular, the interplay of the gravitational redshift of light and optical dispersion in fiber optics is investigated as a means of making a high precision measurement of the gravitational redshift of light. Such a measurement, if practical, would test a basic principle underlying all metric theories of gravity, the Einstein equivalence principle. To this end, two models are discussed. First, a vertical Sagnac interferometer is explored in which the interplay of the gravitational effects and the dispersion causes a non-reciprocal phase shift. In the second model, two vertically separated soliton storage rings form a timing difference after a period of propagation. In addition, this thesis explores the interplay of the optical dispersion with soliton propagation velocity to make a high precision measurement of optical fiber dispersion. Finally, optical soliton control via the interaction of continuous wave light with solitons is explored. Particularly, the effect of the soliton self frequency shift is incorporated into already existing models and investigated.
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