Wavelength calibration with PMAS at 3.5 m Calar Alto Telescope using a tunable astro-comb

J. M. Chavez Boggio, T. Fremberg, D. Bodenmüller, C. Sandin, M. Zajnulina, A. Kelz, D. Giannone, M. Rutowska, B. Moralejo, M. M. Roth, M. Wysmolek, H. Sayinc

Research output: Contribution to journalArticle

Abstract

On-sky tests conducted with an astro-comb using the Potsdam Multi-Aperture Spectrograph (PMAS) at the 3.5 m Calar Alto Telescope are reported. The proposed astro-comb approach is based on cascaded four-wave mixing between two lasers propagating through dispersion optimized nonlinear fibers. This approach allows for a line spacing that can be continuously tuned over a broad range (from tens of GHz to beyond 1 THz) making it suitable for calibration of low- medium- and high-resolution spectrographs. The astro-comb provides 300 calibration lines and his line-spacing is tracked with a wavemeter having 0.3 pm absolute accuracy. First, we assess the accuracy of Neon calibration by measuring the astro-comb lines with (Neon calibrated) PMAS. The results are compared with expected line positions from wavemeter measurement showing an offset of ∼5–20 pm (4%–16% of one resolution element). This might be the footprint of the accuracy limits from actual Neon calibration. Then, the astro-comb performance as a calibrator is assessed through measurements of the Ca triplet from stellar objects HD3765 and HD219538 as well as with the sky line spectrum, showing the advantage of the proposed astro-comb for wavelength calibration at any resolution.

Original languageEnglish
Pages (from-to)186-193
Number of pages8
JournalOptics Communications
Volume415
DOIs
Publication statusPublished - 15 May 2018

Fingerprint

Spectrographs
Telescopes
neon
spectrographs
Neon
apertures
Calibration
telescopes
Wavemeters
Wavelength
sky
spacing
wavelengths
footprints
four-wave mixing
line spectra
Four wave mixing
fibers
high resolution
lasers

Keywords

  • Astronomy
  • Optical frequency comb
  • Spectrograph
  • Wavelength calibration

Cite this

Chavez Boggio, J. M., Fremberg, T., Bodenmüller, D., Sandin, C., Zajnulina, M., Kelz, A., ... Sayinc, H. (2018). Wavelength calibration with PMAS at 3.5 m Calar Alto Telescope using a tunable astro-comb. Optics Communications, 415, 186-193. https://doi.org/10.1016/j.optcom.2018.01.007
Chavez Boggio, J. M. ; Fremberg, T. ; Bodenmüller, D. ; Sandin, C. ; Zajnulina, M. ; Kelz, A. ; Giannone, D. ; Rutowska, M. ; Moralejo, B. ; Roth, M. M. ; Wysmolek, M. ; Sayinc, H. / Wavelength calibration with PMAS at 3.5 m Calar Alto Telescope using a tunable astro-comb. In: Optics Communications. 2018 ; Vol. 415. pp. 186-193.
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Chavez Boggio, JM, Fremberg, T, Bodenmüller, D, Sandin, C, Zajnulina, M, Kelz, A, Giannone, D, Rutowska, M, Moralejo, B, Roth, MM, Wysmolek, M & Sayinc, H 2018, 'Wavelength calibration with PMAS at 3.5 m Calar Alto Telescope using a tunable astro-comb', Optics Communications, vol. 415, pp. 186-193. https://doi.org/10.1016/j.optcom.2018.01.007

Wavelength calibration with PMAS at 3.5 m Calar Alto Telescope using a tunable astro-comb. / Chavez Boggio, J. M.; Fremberg, T.; Bodenmüller, D.; Sandin, C.; Zajnulina, M.; Kelz, A.; Giannone, D.; Rutowska, M.; Moralejo, B.; Roth, M. M.; Wysmolek, M.; Sayinc, H.

In: Optics Communications, Vol. 415, 15.05.2018, p. 186-193.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Wavelength calibration with PMAS at 3.5 m Calar Alto Telescope using a tunable astro-comb

AU - Chavez Boggio, J. M.

AU - Fremberg, T.

AU - Bodenmüller, D.

AU - Sandin, C.

AU - Zajnulina, M.

AU - Kelz, A.

AU - Giannone, D.

AU - Rutowska, M.

AU - Moralejo, B.

AU - Roth, M. M.

AU - Wysmolek, M.

AU - Sayinc, H.

PY - 2018/5/15

Y1 - 2018/5/15

N2 - On-sky tests conducted with an astro-comb using the Potsdam Multi-Aperture Spectrograph (PMAS) at the 3.5 m Calar Alto Telescope are reported. The proposed astro-comb approach is based on cascaded four-wave mixing between two lasers propagating through dispersion optimized nonlinear fibers. This approach allows for a line spacing that can be continuously tuned over a broad range (from tens of GHz to beyond 1 THz) making it suitable for calibration of low- medium- and high-resolution spectrographs. The astro-comb provides 300 calibration lines and his line-spacing is tracked with a wavemeter having 0.3 pm absolute accuracy. First, we assess the accuracy of Neon calibration by measuring the astro-comb lines with (Neon calibrated) PMAS. The results are compared with expected line positions from wavemeter measurement showing an offset of ∼5–20 pm (4%–16% of one resolution element). This might be the footprint of the accuracy limits from actual Neon calibration. Then, the astro-comb performance as a calibrator is assessed through measurements of the Ca triplet from stellar objects HD3765 and HD219538 as well as with the sky line spectrum, showing the advantage of the proposed astro-comb for wavelength calibration at any resolution.

AB - On-sky tests conducted with an astro-comb using the Potsdam Multi-Aperture Spectrograph (PMAS) at the 3.5 m Calar Alto Telescope are reported. The proposed astro-comb approach is based on cascaded four-wave mixing between two lasers propagating through dispersion optimized nonlinear fibers. This approach allows for a line spacing that can be continuously tuned over a broad range (from tens of GHz to beyond 1 THz) making it suitable for calibration of low- medium- and high-resolution spectrographs. The astro-comb provides 300 calibration lines and his line-spacing is tracked with a wavemeter having 0.3 pm absolute accuracy. First, we assess the accuracy of Neon calibration by measuring the astro-comb lines with (Neon calibrated) PMAS. The results are compared with expected line positions from wavemeter measurement showing an offset of ∼5–20 pm (4%–16% of one resolution element). This might be the footprint of the accuracy limits from actual Neon calibration. Then, the astro-comb performance as a calibrator is assessed through measurements of the Ca triplet from stellar objects HD3765 and HD219538 as well as with the sky line spectrum, showing the advantage of the proposed astro-comb for wavelength calibration at any resolution.

KW - Astronomy

KW - Optical frequency comb

KW - Spectrograph

KW - Wavelength calibration

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U2 - 10.1016/j.optcom.2018.01.007

DO - 10.1016/j.optcom.2018.01.007

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JO - Optics Communications

JF - Optics Communications

SN - 0030-4018

ER -