Dynamically tunable optomechanical large mode suspended waveguide for high power and broadband guided optics (Conference Presentation)

Enrico Casamenti; Tao Yang; Yves Bellouard

doi:10.1117/12.2514097

4 March 2019 Dynamically tunable optomechanical large mode suspended waveguide for high power and broadband guided optics (Conference Presentation)

Enrico Casamenti, Tao Yang, Yves Bellouard

Author Affiliations +

Proceedings Volume 10908, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIX; 109080P (2019) https://doi.org/10.1117/12.2514097
Event: SPIE LASE, 2019, San Francisco, California, United States

Abstract

Not only are waveguides fundamental as a light carrier, yet they are also key elements for countless optical components such as couplers, modulators and oscillators to name a few. Modulating waveguides is usually performed using electro-optics or acousto-optics principles involving, among others, specific crystals such as Lithium-Niobate or glass thermal poling to introduce second order non-linearity. In this work, we investigate a waveguide phase-modulation based on optomechanics and in particular photoelasticity. Specifically, a fused silica suspended 3D waveguide suitable for a broad visible and near-infrared spectrum and able to carry a large single mode is implemented in the form of a double-clamped suspended beam. This optomechanical device oscillates up to kHz frequencies thanks to the use of dielectrophoresis excitation, resulting from a varying non-linear electric field. The suspended waveguide seats in a V-shape groove providing the electrostatic field. The full device is manufactured out of a single piece of silica through femtosecond laser exposure combined with chemical etching. In addition, a CO2-laser polishing step is added to achieve high surface quality and prevent scattering losses. The dynamic response of this optomechanical device can be further tuned - using the same femtosecond laser - to shift from a non-linear hardening frequency response to a linear one or to a softening mode.

Conference Presentation

Citation Download Citation

Enrico Casamenti, Tao Yang, and Yves Bellouard "Dynamically tunable optomechanical large mode suspended waveguide for high power and broadband guided optics (Conference Presentation)", Proc. SPIE 10908, Frontiers in Ultrafast Optics: Biomedical, Scientific, and Industrial Applications XIX, 109080P (4 March 2019); https://doi.org/10.1117/12.2514097

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KEYWORDS

Waveguides

Waveguide modes

Femtosecond phenomena

Optical components

Silica

Chemical elements

Electro optics

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