Instruments without optics: an integrated photonic spectrograph

Bland-Hawthorn, Joss; Horton, Anthony

doi:10.1117/12.670931

Cited by 65 publications

(64 citation statements)

References 21 publications

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“…This necessitates the development of suitable seeing limited spectroscopic instrumentation. 1 The size of the optical components in a conventional spectrograph scales roughly with the telescope diameter D, hence the volume, mass, and cost of the instrument scale roughly as diameter cubed.…”

Section: Introductionmentioning

confidence: 99%

Development of high-resolution arrayed waveguide grating spectrometers for astronomical applications: first results

Gatkine

Veilleux

et al. 2016

SPIE Proceedings

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Astrophotonics is the next-generation approach that provides the means to miniaturize near-infrared (NIR) spectrometers for upcoming large telescopes and make them more robust and inexpensive. The target requirements for our spectrograph are: a resolving power of ∼3000, wide spectral range (J and H bands), free spectral range of about 30 nm, high on-chip throughput of about 80% (-1dB) and low crosstalk (high contrast ratio) between adjacent on-chip wavelength channels of less than 1% (-20 dB). A promising photonic technology to achieve these requirements is Arrayed Waveguide Gratings (AWGs). We have developed our first generation of AWG devices using a silica-on-silicon substrate with a very thin layer of Si 3 N 4 in the core of our waveguides. The waveguide bending losses are minimized by optimizing the geometry of the waveguides. Our first generation of AWG devices are designed for H band have a resolving power of ∼1500 and free spectral range of ∼ 10 nm around a central wavelength of 1600 nm. The devices have a footprint of only 12 mm × 6 mm. They are broadband (1450-1650 nm), have a peak on-chip throughput of about 80% (∼ -1 dB) and contrast ratio of about 1.5% (-18 dB). These results confirm the robustness of our design, fabrication and simulation methods. Currently, the devices are designed for Transverse Electric (TE) polarization and all the results are for TE mode. We are developing separate J-and H-band AWGs with higher resolving power, higher throughput and lower crosstalk over a wider free spectral range to make them better suited for astronomical applications.

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Section: Introductionmentioning

confidence: 99%

Development of high-resolution arrayed waveguide grating spectrometers for astronomical applications: first results

Gatkine

Veilleux

et al. 2016

SPIE Proceedings

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“…There are some promising concepts under development: array waveguide spectrometers [39] and integrated Lippmann interferometric spectrometers [40], with a joint research programme about to start with OPTICON FP7 funding [41]. Eventually, it may be possible to use such spectrometers to devise a wide-field multi-object spectrometer with up to a thousand spectrometers with integrated detectors, perhaps mounted on miniature self-propelled robots, patrolling a field and communicating with wireless links, possibly with inductively coupled power.…”

Section: Photonic Devicesmentioning

confidence: 98%

Future technologies for optical and infrared telescopes and instruments

Cunningham

2009

Exp Astron

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The theme of this conference is the evolution of telescopes over the last 400 years. I present my view on what the major leaps of technology have been, and attempt to predict what new technologies could come along in the next 50 years to change the way we do astronomy and help us make new discoveries. Are we approaching a peak of innovation and discovery, and will this be followed by a slow decline? Or are there prospects for even further technology leaps and consequent new discoveries? Will global resource and financial crises bring an end to our great ambitions, or will we continue with bigger telescopes and more ambitious space observatories?

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“…Alternative dispersers enabling microspectrographs are also arising from recent developments in photonic crystal superprisms 15 . The AAO has also been involved in exciting work developing an integrated photonic spectrograph for astronomical application 16 . Tunable filter payloads are also an interesting possibility, especially when combined with deployable imagers.…”

Section: Active Science Payloadsmentioning

confidence: 99%

Deployable payloads with Starbug

McGrath

Haynes

2006

SPIE Proceedings

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We explore the range of wide field multi-object instrument concepts taking advantage of the unique capabilities of the Starbug focal plane positioning concept. Advances to familiar instrument concepts, such as fiber positioners and deployable fiber-fed IFUs, are discussed along with image relays and deployable active sensors. We conceive deployable payloads as components of systems more traditionally regarded as part of telescope systems rather than instruments -such as adaptive optics and ADCs. Also presented are some of the opportunities offered by the truly unique capabilities of Starbug, such as microtracking to apply intra-field distortion correction during the course of an observation.

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Instruments without optics: an integrated photonic spectrograph

Cited by 65 publications

References 21 publications

Development of high-resolution arrayed waveguide grating spectrometers for astronomical applications: first results

Development of high-resolution arrayed waveguide grating spectrometers for astronomical applications: first results

Future technologies for optical and infrared telescopes and instruments

Deployable payloads with Starbug

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