@inproceedings{28827d2dee9b4c2cbde0f3e9dac15bb0,
title = "Second generation OH suppression filters using multicore fibres",
abstract = "Ground based near-infrared observations have long been plagued by poor sensitivity when compared to visible observations as a result of the bright narrow line emission from atmospheric OH molecules. The GNOSIS instrument recently commissioned at the Australian Astronomical Observatory uses Photonic Lanterns in combination with individually printed single mode fibre Bragg gratings to filter out the brightest OH-emission lines between 1.47 and 1.70μm. GNOSIS, reported in a separate paper in this conference, demonstrates excellent OH-suppression, providing very {"}clean{"} filtering of the lines. It represents a major step forward in the goal to improve the sensitivity of ground based near-infrared observation to that possible at visible wavelengths, however, the filter units are relatively bulky and costly to produce. The 2nd generation fibre OH-Suppression filters based on multicore fibres are currently under development. The development aims to produce high quality, cost effective, compact and robust OH-Suppression units in a single optical fibre with numerous isolated single mode cores that replicate the function and performance of the current generation of {"}conventional{"} photonic lantern based devices. In this paper we present the early results from the multicore fibre development and multicore fibre Bragg grating imprinting process.",
keywords = "Astrophotonics, Fibre bragg grating, Fibre taper, Multicore fibre, Near-infrared, OH suppression, Photonic lantern, Spectroscopy",
author = "R. Haynes and Birks, {T. A.} and J. Bland-Hawthorn and Cruz, {J. L.} and A. Diez and Ellis, {S. C.} and D. Haynes and Kr{\"a}mer, {R. G.} and Mangan, {B. J.} and S. Min and Murphy, {D. F.} and S. Nolte and Olaya, {J. C.} and Thomas, {J. U.} and Trinh, {C. Q.} and A. T{\"u}nnermann and Christian Voigtl{\"a}nder",
year = "2012",
month = sep,
day = "13",
doi = "10.1117/12.925923",
language = "English",
isbn = "9780819491510",
series = "Proceedings of SPIE",
publisher = "SPIE",
editor = "Ram{\'o}n Navarro and Cunningham, {Colin R.} and Eric Prieto",
booktitle = "Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation II",
address = "United States",
note = "Modern Technologies in Space- and Ground-Based Telescopes and Instrumentation II ; Conference date: 01-07-2012 Through 06-07-2012",
}