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Integrated echélle gratings for astrophotonics
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Paper Abstract

In pursuit of miniaturization of spectrograph systems, various wavelength-dispersive technologies such as arrayed waveguide gratings (AWGs) [1] and stationary-wave integrated Fourier transform spectrographs (SWIFTS) [2] have been studied as possible candidates for practical implementations of compact, lightweight integrated spectrographs. Integrated echélle-grating (EG) based wavelength demultiplexers have been proposed as an alternative to AWGs for use as the main diffractive element in such a compact spectrograph [3]. Apart from the simple Rowland mount type, more sophisticated geometries, such as the perfect chirped grating (PCG) [4] and two-stigmatic-point gratings (SEG) [5] exist. In this work, we present the first planar integrated echélle grating based on SEG geometry and specifically designed for astronomical spectroscopy in the NIR range ~1500 nm to 1600 nm.

Paper Details

Date Published: 3 January 2020
PDF: 2 pages
Proc. SPIE 11203, Advances in Optical Astronomical Instrumentation 2019, 112030Z (3 January 2020); doi: 10.1117/12.2541554
Show Author Affiliations
Andreas Stoll, Leibniz-Institut für Astrophysik Potsdam (Germany)
Yu Wang, Leibniz-Institut für Astrophysik Potsdam (Germany)
Kalaga Madhav, Leibniz-Institut für Astrophysik Potsdam (Germany)
Martin Roth, Leibniz-Institut für Astrophysik Potsdam (Germany)


Published in SPIE Proceedings Vol. 11203:
Advances in Optical Astronomical Instrumentation 2019
Simon C. Ellis; Céline d'Orgeville, Editor(s)

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