Multi-octave frequency comb generation by χ(3)-nonlinear optical processes in CVD diamond at low temperatures

O. Lux, V. G. Ralchenko, A. P. Bolshakov, V. I. Konov, G. V. Sharonov, A. Shirakawa, H. Yoneda, H. Rhee, H. J. Eichler, R. P. Mildren, A. A. Kaminskii

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15 Citations (Scopus)

Abstract

We study stimulated Raman scattering (SRS) and Raman four-wave mixing (RFWM) processes in chemical vapour deposition (CVD) diamond crystals. The strong interaction of picosecond laser pulses at 1.064 and 0.532 μm wavelength with the dominant Raman-active F2g mode results in a more than two-octave-spanning frequency comb, ranging from the UV to the NIR spectral region. In addition to spectroscopic analysis of the χ(3)- nonlinear emission at room temperature, comparative measurements have been carried out at cryogenic temperature of 10 K. The Raman shift and the Raman gain are found to change only weakly. Moreover, the potential of SRS frequency comb generation in CVD diamond for ultra-short pulse synthesis is discussed.

Original languageEnglish
Article number086101
Pages (from-to)1-9
Number of pages9
JournalLaser Physics Letters
Volume11
Issue number8
DOIs
Publication statusPublished - 1 Aug 2014

Keywords

  • CVD diamond
  • Keywords: stimulated Raman scattering (SRS)
  • Raman four-wave mixing
  • frequency combs
  • low temperature SRS spectroscopy
  • ultra-short pulse synthesis

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