GNOSIS: an OH suppression unit for near-infrared spectrographs

Ellis, S. C.; Bland-Hawthorn, Joss; Lawrence, Jon; Bryant, Julia J.; Haynes, Roger; Horton, Anthony; Lee, S.; Leon-Saval, Sergio G.; Löhmannsröben, H.‐G.; Mladenoff, J.; O’Byrne, John W.; Rambold, William; Roth, Martin; Trinh, Christopher

doi:10.1117/12.856348

Cited by 9 publications

(7 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…31(c) shows the expected loss as calculated using Eq. (11). We see that close mode-number matching and hence low loss can be sustained over a spectral octave, from L down to about ½ L.…”

Section: Multicore Fibres As Multimode Fibresmentioning

confidence: 73%

“…Early interest in photonic lanterns was based on their originally-envisaged applications in astronomical instrumentation [1][2][3][4][5][7][8][9][10][11][12][13][17][18][19][21][22][23][24][25][26][27][28][29][30][31][32]34,37,38] but recent attention has increasingly focused on their use in telecommunication [20,33,35,36,40,42,43,[46][47][48]52,53,55,57,58,67,[69][70][71][72]…”

Section: Space Division Multiplexingmentioning

confidence: 99%

“…Thus photonic lanterns have applications wherever there is a need to convert light between single-mode and multimode systems, especially if the distribution of light between output states (cores or modes) is unimportant. One example is in astronomical instrumentation, where the multimode light delivered by a telescope needs to be spectrally-filtered by single-mode fibre Bragg gratings [1,3,[10][11][12]18,21,23,25,26,28,31,37,39,41,49,54,64,66]. Another is in optical telecommunications, where individual channels of information delivered by single-mode fibres need to be multiplexed via orthogonal combinations of modes in a common few-mode fibre [20,33,35,36,40,42,43,[46][47][48]52,53,57,58,67,[69][70][71][72][73][74][75][76][77][78][79].…”

Section: Fig 1 a Schematic Diagram Of A Photonic Lantern Made By Tape...mentioning

confidence: 99%

See 2 more Smart Citations

The photonic lantern

et al. 2015

View full text Add to dashboard Cite

show abstract

Section: Multicore Fibres As Multimode Fibresmentioning

confidence: 73%

Section: Space Division Multiplexingmentioning

confidence: 99%

Section: Fig 1 a Schematic Diagram Of A Photonic Lantern Made By Tape...mentioning

confidence: 99%

See 1 more Smart Citation

The photonic lantern

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The lantern is comprised of an array of isolated SMF cores which are adiabatically tapered into one MMF core such that the supermodes of the SMF array evolve into the modes of the MMF core, and vice versa. Hence, multimode light captured by the telescope can be efficiently separated into multiple SMFs, enabling devices that only operate in the single mode regime, such as fiber Bragg gratings used for OH emission line suppression [22] and the AWG based spectrograph.…”

Section: Direct Multiple Fiber Inputmentioning

confidence: 99%

Developing arrayed waveguide grating spectrographs for multi-object astronomical spectroscopy

Cvetojevic¹,

Jovanović²,

Lawrence³

et al. 2012

Opt. Express

View full text Add to dashboard Cite

With the aim of utilizing arrayed waveguide gratings for multi-object spectroscopy in the field of astronomy, we outline several ways in which standard telecommunications grade chips should be modified. In particular, by removing the parabolic-horn taper or multimode interference coupler, and injecting with an optical fiber directly, the resolving power was increased threefold from 2400 ± 200 (spectral resolution of 0.63 ± 0.2 nm) to 7000 ± 700 (0.22 ± 0.02 nm) while attaining a throughput of 77 ± 5%. More importantly, the removal of the taper enabled simultaneous off-axis injection from multiple fibers, significantly increasing the number of spectra that can be obtained at once (i.e. the observing efficiency). Here we report that ~12 fibers can be injected simultaneously within the free spectral range of our device, with a 20% reduction in resolving power for fibers placed at 0.8 mm off-centre.

show abstract

“…The core diameter and NA are chosen to sufficiently sample the seeing-limited telescope point spread function for the 4 m diameter Anglo-Australian Telescope [15].…”

mentioning

confidence: 99%