Noise suppression in femtosecond mid-infrared light sources

Peter Hamm, Robert A. Kaindl, Jens Stenger

Research output: Contribution to journalArticlepeer-review

245 Scopus citations


An experimental and theoretical study of intrinsic correlations and noise-suppression mechanisms in two-stage femtosecond mid-IR light sources is presented. The setup, based on parametric amplification in BBO and subsequent difference-frequency mixing in AgGaS2, delivers ≈100-fs mid-IR pulses with 1 2-µJ energy. Exceptionally low pulse-energy f luctuations of only 0.2% in the mid-IR (λ ≈ 3-6 µm) are found, which are much smaller than the Ti:sapphire amplifer noise. The noise suppression is analyzed and found to stem from the interplay between dispersion and pump depletion.

Original languageEnglish (US)
Pages (from-to)1798-1800
Number of pages3
JournalOptics Letters
Issue number24
StatePublished - Dec 15 2000
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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