18 July 2014 New generation of photonic lanterns for mid-IR astronomy
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We report the fabrication and characterization of prototype femtosecond-laser direct-written integrated photonic lanterns for operation in the mid-infrared (mid-IR). The devices were inscribed inside the bulk of a commercial gallium lanthanum sulphide (GLS) chalcogenide glass substrate and the characterization was performed using monochromatic light with a wavelength of 3.39 μm. We demonstrate that these proof-of-concept devices are capable of coupling specific multimode states of light into an array of single-modes, and vice-versa, with low-loss. In the future, instruments that utilize the single-moded output of such components may find applications in areas such as heterodyne spectroscopy, interferometry and remote sensing.
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A. Arriola, A. Arriola, D. Choudhury, D. Choudhury, R. R. Thomson, R. R. Thomson, } "New generation of photonic lanterns for mid-IR astronomy", Proc. SPIE 9151, Advances in Optical and Mechanical Technologies for Telescopes and Instrumentation, 915116 (18 July 2014); doi: 10.1117/12.2056526; https://doi.org/10.1117/12.2056526

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