Efficient frequency comb generation in the 9-μm region using compact fiber sources

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8 Scopus citations


We demonstrate a midinfrared (mid-IR) frequency comb spanning from 7.5 to \(11.6μ) m at a -20-dB level using difference frequency generation in a AgGaS2 crystal with a compact all-fiber source based on Tm3+ and Er3+-amplifiers. The power of the mid-IR signal is measured to be 1.55 mW and the photon conversion efficiency is 16%. The pulse duration achieved in the mid-IR range is estimated to be \(\sim 80\) fs, which corresponds to 2.6 optical cycles at the 9.2- \(\mu \) m center wavelength. The current approach allows simple power scaling by further amplification of the pump and signal pulses using established fiber amplifier technologies.

Original languageEnglish (US)
Article number6882132
Pages (from-to)2271-2274
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number22
StatePublished - Nov 15 2014


  • Frequency combs
  • Mid-infrared.
  • Nonlinear optics
  • Optical fiber lasers

ASJC Scopus subject areas

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


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