Miniature integrated optic Fabry-Perot slit interferometer

John G. Farah

doi:10.1117/12.169947

9 March 1994 Miniature integrated optic Fabry-Perot slit interferometer

John G. Farah

Proceedings Volume 2070, Fiber Optic and Laser Sensors XI; (1994) https://doi.org/10.1117/12.169947
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

A miniature Fabry-Perot cavity consists of a 10 micron deep by 5 micron wide slit which is formed in a silica (SiO₂) waveguide over silicon with the use of reactive ion etching. The multiple beam interference is due to successive reflections from both walls of the slit. The reflectance close to the critical angle exhibits a Finesse over 20. A model is developed to simulate the loss due to scattering from the etched wall roughness. The loss in amplitude is only 7% after each reflection. Thus, the etched walls are vertical and smooth and can be used as efficient mirrors in integrated-optical circuits and interferometers.

Citation Download Citation

John G. Farah "Miniature integrated optic Fabry-Perot slit interferometer", Proc. SPIE 2070, Fiber Optic and Laser Sensors XI, (9 March 1994); https://doi.org/10.1117/12.169947

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