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Proceedings Paper

Miniature spectrographs: characterization of arrayed waveguide gratings for astronomy
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Paper Abstract

We present results from a laboratory characterization of integrated photonic arrayed-waveguide grating chips, which are a modified version of commercial arrayed-waveguide grating multiplexors, for the purposes of creating an integrated photonic spectrograph. Using a robust probing setup we measure the peak total efficiency of the chips to be ~75%. We measure the spectral resolution full-width half maximum to be 0.22 ± 0.02 nm, (giving R = λ/δλ = 7000 ± 700 at 1500 nm). For our device we find the free-spectral range is ~60 nm and slightly larger than the full-width half-maximum of the efficiency profile (53 nm). Finally, we briefly discuss the importance of an integrated cross-dispersion component for the new integrated photonic spectrograph prototype.

Paper Details

Date Published: 20 July 2010
PDF: 7 pages
Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77394H (20 July 2010); doi: 10.1117/12.856782
Show Author Affiliations
Nick Cvetojevic, Macquarie Univ. (Australia)
Australian Astronomical Observatory (Australia)
Nemanja Jovanovic, Macquarie Univ. (Australia)
Australian Astronomical Observatory (Australia)
Joss Bland-Hawthorn, Sydney Institute for Astronomy, The Univ. of Sydney (Australia)
Roger Haynes, innoFSPEC, Astrophysikalisches Institut Potsdam (Germany)
Jon Lawrence, Macquarie Univ. (Australia)
Australian Astronomical Observatory (Australia)


Published in SPIE Proceedings Vol. 7739:
Modern Technologies in Space- and Ground-based Telescopes and Instrumentation
Eli Atad-Ettedgui; Dietrich Lemke, Editor(s)

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