Near-Infrared 10-GHz Astrocomb with Mode Identification

Yuk Shan Cheng, Dong Xiao, Richard A. McCracken, Derryck T. Reid

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The specification of the HIRES spectrograph proposed for the forthcoming Extremely Large Telescope (ELT) requires a traceable calibration source with gap-free coverage from 370-2500 nm, except for a region from 1350- 1440 nm aligned with atmospheric absorption [1]. In [2] we described a route to a broadband astrocomb from 0.5 to 2.2m based on a 1-GHz Ti:sapphire oscillator and a phase-coherent optical parametric oscillator (OPO). We now report the development of this work which has demonstrated a 10-GHz astrocomb extended from a degenerate optical parametric oscillator (OPO), producing a comb spanning 1.15-1.8m, with individual comb-mode positions identified. We show that the comb-mode positions obtained through Fourier-transform spectrometry can be fitted with sufficient accuracy to obtain the carrier envelope offset of the original OPO source comb.

Original languageEnglish
Title of host publication2021 Conference on Lasers and Electro-Optics Europe & European Quantum Electronics Conference (CLEO/Europe-EQEC)
ISBN (Electronic)9781665418768
Publication statusPublished - 30 Sept 2021
Event2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference - Munich, Germany
Duration: 21 Jun 202125 Jun 2021


Conference2021 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference
Abbreviated titleCLEO/Europe-EQEC 2021

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics


Dive into the research topics of 'Near-Infrared 10-GHz Astrocomb with Mode Identification'. Together they form a unique fingerprint.

Cite this