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An high speed integrated optical Fabry-Perot modulator

Liang, Jia Yi; (1992) An high speed integrated optical Fabry-Perot modulator. Doctoral thesis (Ph.D), UCL (University College London). Green open access

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Abstract

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.

Type: Thesis (Doctoral)
Qualification: Ph.D
Title: An high speed integrated optical Fabry-Perot modulator
Open access status: An open access version is available from UCL Discovery
Language: English
Additional information: Thesis digitised by ProQuest.
Keywords: Applied sciences; Lithium niobate
URI: https://discovery.ucl.ac.uk/id/eprint/10113017
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