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

作者：Lux O^*; Ralchenko V G; Bolshakov A P; Konov V I; Sharonov G V; Shirakawa A; Yoneda H; Rhee H; Eichler H J; Mildren R P; Kaminskii A A

来源：Laser Physics Letters, 2014, 11(8): 086101.

DOI：10.1088/1612-2011/11/8/086101

• stimulated Raman scattering (SRS)
• CVD diamond
• frequency combs
• low temperature SRS spectroscopy
• chi((3))-nonlinear processes
• Raman four-wave mixing
• ultra-short pulse synthesis

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 mu m wavelength with the dominant Raman-active F-2g 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 chi((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.

• 出版日期2014-8-1