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Gross S, Jovanovic N, Sharp A, et al. Low loss mid-infrared ZBLAN waveguides for future astronomical applications. Opt Express. 2015;23(6):7946-56doi: 10.1364/OE.23.007946.
Gross, S., Jovanovic, N., Sharp, A., Ireland, M., Lawrence, J., & Withford, M. J. (2015). Low loss mid-infrared ZBLAN waveguides for future astronomical applications. Optics express, 23(6), 7946-56. https://doi.org/10.1364/OE.23.007946
Gross, Simon, et al. "Low loss mid-infrared ZBLAN waveguides for future astronomical applications." Optics express vol. 23,6 (2015): 7946-56. doi: https://doi.org/10.1364/OE.23.007946
Gross S, Jovanovic N, Sharp A, Ireland M, Lawrence J, Withford MJ. Low loss mid-infrared ZBLAN waveguides for future astronomical applications. Opt Express. 2015 Mar 23;23(6):7946-56. doi: 10.1364/OE.23.007946. PMID: 25837132.
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Opt Express. 2015 Mar 23;23(6):7946-56. doi: 10.1364/OE.23.007946.

Low loss mid-infrared ZBLAN waveguides for future astronomical applications.

Optics express

Simon Gross, Nemanja Jovanovic, Adam Sharp, Michael Ireland, Jon Lawrence, Michael J Withford

PMID: 25837132 DOI: 10.1364/OE.23.007946

Abstract

Photonic technologies will be at the heart of future terrestrial planet hunting interferometers. In particular the mid-infrared spectral region between 3.5 - 4.2 μm is the ideal window for hunting for young extra-solar planets, since the planet is still hot from its formation and thus offers a favorable contrast with respect to the parent star compared to other spectral regions. This paper demonstrates two basic photonic building blocks of such an instrument, namely single-mode waveguides with propagation losses as low as 0.29±0.03 dB/cm at a wavelength of 4 μm as well as directional couplers with a constant splitting ratio across a broad wavelength band of 500 nm. The devices are based on depressed cladding waveguides inscribed into ZBLAN glass using the femtosecond laser direct-write technique. This demonstration is the first stepping stone towards the realization of a high transmission mid-infrared nulling interferometer.

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