Ultrafast laser inscribed integrated waveguide components for L-band interferometry

A. Arriola; S. Mukherjee; Debaditya Choudhury; L. Labadie; R. R. Thomson

doi:10.1117/12.2056494

24 July 2014 Ultrafast laser inscribed integrated waveguide components for L-band interferometry

A. Arriola , S. Mukherjee, Debaditya Choudhury, L. Labadie, R. R. Thomson

Proceedings Volume 9146, Optical and Infrared Interferometry IV; 91462L (2014) https://doi.org/10.1117/12.2056494
Event: SPIE Astronomical Telescopes + Instrumentation, 2014, Montréal, Quebec, Canada

Abstract

In this paper we report the fabrication and mid-infrared characterization (λ = 3.39 μm) of evanescent field directional couplers. These devices were fabricated using the femtosecond laser direct-writing technique in commercially available Gallium Lanthanum Sulphide (GLS) glass substrates. We demonstrate that the power splitting ratios of the devices can be controlled by adjusting the length of the interaction section between the waveguides, and consequently we demonstrate power splitting ratios of between 8% and 99% for 3.39 μm light. We anticipate that mid-IR beam integrated-optic beam combination instruments based on this technology will be key for future mid-infrared astronomical interferometry, particularly for nulling interferometry and earth-like exoplanet imaging.

Citation Download Citation

A. Arriola , S. Mukherjee, Debaditya Choudhury, L. Labadie, and R. R. Thomson "Ultrafast laser inscribed integrated waveguide components for L-band interferometry", Proc. SPIE 9146, Optical and Infrared Interferometry IV, 91462L (24 July 2014); https://doi.org/10.1117/12.2056494

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