| DOI | Resolve DOI: https://doi.org/10.1117/12.926626 |
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| Author | Search for: Tollestrup, E.V.; Search for: Pazder, J.1; Search for: Barrick, G.; Search for: Martioli, E.; Search for: Schiavon, R.P.; Search for: Anthony, A.1; Search for: Halman, M.1; Search for: Veillet, C. |
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| Affiliation | - National Research Council of Canada. NRC Herzberg Institute of Astrophysics
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| Format | Text, Article |
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| Conference | Ground-Based and Airborne Instrumentation for Astronomy IV, July 1-6, 2012, Amsterdam, The Netherlands |
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| Subject | Focal ratio degradation; High resolution; Initial design; Keck observatory; Laboratory test; Long fiber; Optical spectrograph; Remote access; Transmission loss; Astronomy; Optical fibers; Optical telescopes; Telescopes; Spectrographs |
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| Abstract | The Gemini Remote Access CFHT ESPaDOnS Spectrograph (GRACES) is an innovative instrumentation experiment that will demonstrate if ESPaDOnS, a bench-mounted high-resolution optical spectrograph at CFHT, can be fed by a 270-m long fiber from the Gemini-North telescope with low enough losses to remain competitive with conventional spectrographs on other 8 to 10-m telescopes. Detailed simulations have shown that GRACES should be more sensitive than the HIRES spectrograph at Keck Observatory at wavelengths longer than about 600-700 nm. This result is possible by using FPB-type of optical fibers made by Polymicro Technologies and by keeping the critical focal ratio degradation (FRD) losses to less than 10%. Laboratory tests on these FPB optical fibers are underway and show that for 36-m lengths that the FRD losses are as low as 0.8% with a repeatability of 1%. Tests are currently underway on 280-m lengths. © 2012 SPIE. |
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| Publication date | 2012 |
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| Publisher | SPIE |
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| In | |
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| Series | |
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| Language | English |
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| Peer reviewed | Yes |
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| NPARC number | 21269204 |
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| Export citation | Export as RIS |
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| Report a correction | Report a correction (opens in a new tab) |
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| Record identifier | 311509c3-defe-4ec6-a038-68bfce8c571b |
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| Record created | 2013-12-12 |
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| Record modified | 2020-04-21 |
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