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Title: An high speed integrated optical Fabry-Perot modulator
Author: Liang, Jia Yi
Awarding Body: University of London
Current Institution: University College London (University of London)
Date of Award: 1992
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This thesis describes a novel approach to high speed optical modulation in lithium niobate using an optically resonant Fabry-Perot cavity. In this work, single mode, low optical loss, out-diffusion-free waveguides were realised by a modified titanium indiffusion into a lithium niobate substrate. The coplanar asymmetric travelling-wave electrodes were investigated and fabricated by a new technique called the "etched-lift-off" method. Multi-layer highly reflective dielectric coatings were deposited onto the waveguide ends to form an optical cavity. The behavior of the optical waveguide Fabry-Perot cavity was analysed. The sensitivity to temperature variation of the modulator was investigated as well, and this indicated the possibility of using the cavity as a temperature sensor. The theoretical simulation of the Fabry- Perot modulation at high frequency was also calculated. Finally, the integrated optical Fabry-Perot modulator was fabricated and a modulation bandwidth of at least one GHz was achieved.
Supervisor: Not available Sponsor: Not available
Qualification Name: Thesis (Ph.D.) Qualification Level: Doctoral
EThOS ID:  DOI: Not available