Towards a visible to mid-infrared astrocomb for the extremely large telescope

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

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

Abstract

The Extremely Large Telescope (ELT), currently under construction in Chile, aims to investigate exoplanet atmospheric spectroscopy, star / planet formation and evolution, and cosmology and fundamental physics with a broadband high-resolution spectrograph, designated ELT-HIRES. Comprising four modules covering wavelengths from 370-2500 nm, this instrument requires laser comb calibration with mode spacings from 32 GHz (<600 nm) to 6 GHz (>1950 nm). As illustrated by our recent review paper [1], approaches to date based on nonlinear broadening of a single ultrafast oscillator still fall significantly short of the required coverage. Here we present a new approach yielding a nearly-continuous 500-2200 nm 1-GHz comb from dual supercontinua sources pumped by an 805-nm Ti:sapphire oscillator and phase coherent 1610-nm pulses from a degenerate optical parametric oscillator (OPO) [2].

Original languageEnglish
Title of host publication2019 Conference on Lasers and Electro-Optics Europe and European Quantum Electronics Conference (CLEO/Europe-EQEC)
PublisherIEEE
ISBN (Electronic)9781728104690
DOIs
Publication statusPublished - 17 Oct 2019

ASJC Scopus subject areas

  • Spectroscopy
  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Atomic and Molecular Physics, and Optics
  • Computer Networks and Communications

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