Active phase change for a kernel nulling interferometer

Harry-Dean Kenchington Goldsmith; Michael Ireland; Frantz Martinache; Nick Cvetojevic; Stephen Madden

doi:10.1117/12.2562894

13 December 2020 Active phase change for a kernel nulling interferometer

Harry-Dean Kenchington Goldsmith, Michael Ireland, Frantz Martinache, Nick Cvetojevic, Stephen Madden

Proceedings Volume 11446, Optical and Infrared Interferometry and Imaging VII; 114462V (2020) https://doi.org/10.1117/12.2562894
Event: SPIE Astronomical Telescopes + Instrumentation, 2020, Online Only

Conference Poster

Abstract

Active phase control is a vital component to any interferometry system. On a simple photonic device this can often be achieved using bulk optics before the chip, but for complicated systems active phase control on-chip is a vital component of the photonic design. One method of active phase control is using the thermo-optic effect. Using a chalcogenide waveguides, chromium heaters actively change the refractive index of the glass, this changes the optical path length of the light. This paper shows that chromium deposited above arms of a Mach-Zehnder interferometer will be able to produce multiple pi phase shifts at a rate of approximately 40 mW per π phase shift. Hence a chalcogenide based platform is suitable for a complicated photonic device like a Kernel-Nulling interferometer.

Conference Presentation

Citation Download Citation

Harry-Dean Kenchington Goldsmith, Michael Ireland, Frantz Martinache, Nick Cvetojevic, and Stephen Madden "Active phase change for a kernel nulling interferometer", Proc. SPIE 11446, Optical and Infrared Interferometry and Imaging VII, 114462V (13 December 2020); https://doi.org/10.1117/12.2562894

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