Arrayed waveguide gratings for astronomical applications

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

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference proceeding contributionpeer-review


The size and cost of astronomical instrumentation is increasing in proportion to the size of the telescope aperture, becoming unsustainable for the next generation of extremely large telescopes being constructed at present. Hence, there is a great need for miniaturised and more cost effective instrumentation. One potential solution is the integrated photonic spectrograph, using a modified arrayed waveguide grating structure to produce spectrally dispersed light on an integrated chip with physical dimensions much smaller than current spectrographs. Building on previous on-sky demonstrations of a prototype device, we elucidate the modifications necessary to make a commercially-available telecommunications-grade arrayed waveguide grating more favourable for the field of astronomy. The parameters that are discussed include the free-spectralrange, resolution and diffraction order of the device. These parameters will form a foundation for the first generation of arrayed waveguide gratings designed specifically for astronomy.

Original languageEnglish
Title of host publicationAdvanced Photonics & Renewable Energy
Subtitle of host publicationOSA Technical Digest
Place of PublicationWashington, DC
PublisherOptical Society of America (OSA)
Number of pages2
ISBN (Print)9781557528964, 1557528969
Publication statusPublished - 2010
EventBragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BGPP 2010 - Karlsruhe, Germany
Duration: 21 Jun 201024 Jun 2010


OtherBragg Gratings, Photosensitivity, and Poling in Glass Waveguides, BGPP 2010


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