Miniature spectrographs: characterization of arrayed waveguide gratings for astronomy

Nick Cvetojevic; Nemanja Jovanovic; Joss Bland-Hawthorn; Roger Haynes; Jon Lawrence

doi:10.1117/12.856782

20 July 2010 Miniature spectrographs: characterization of arrayed waveguide gratings for astronomy

Nick Cvetojevic, Nemanja Jovanovic, Joss Bland-Hawthorn, Roger Haynes, Jon Lawrence

Proceedings Volume 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation; 77394H (2010) https://doi.org/10.1117/12.856782
Event: SPIE Astronomical Telescopes + Instrumentation, 2010, San Diego, California, United States

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.

Citation Download Citation

Nick Cvetojevic, Nemanja Jovanovic, Joss Bland-Hawthorn, Roger Haynes, and Jon Lawrence "Miniature spectrographs: characterization of arrayed waveguide gratings for astronomy", Proc. SPIE 7739, Modern Technologies in Space- and Ground-based Telescopes and Instrumentation, 77394H (20 July 2010); https://doi.org/10.1117/12.856782

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