Picosecond stimulated Raman scattering in crystals

Raman Spectroscopy and Structure of InBO3

“…The present results for InBO 3 crystals demonstrate that the nature of cation-anion bonds also influences the intensity and polarization of the Raman lines in the region of the internal modes of molecular complexes. Similar effects were reported earlier for PbMoO 4 , PbWO 4 , and ZrSiO 4 crystals [13,19], in which the Pb 2+ and Zr 4+ ions form far more covalent bonds than do alkali-metal and alkalineearth cations.…”

Synchronously pumped intracavity YLF–Nd–KGW picosecond Raman lasers and LiF:F–2amplifiers

“…Measured at second harmonic radiation frequency the SRS spectral width ∼ 5 cm −1 corresponds to nearly transformlimited SRS pulses. Spontaneous Raman scattering line widths in KGW crystal, which could restrict compressed stokes pulse duration, agree closely for both active 767 and 901 cm responds to optical phonon dephasing time T 2 = 1.96 ps [12]. Thus, the SRS pulse duration for the Nd:KGW and Nd:YLF-KGW lasers is close to optical phonon dephasing time.…”

Efficient picosecond traveling-wave Raman conversion in a SrWO4 crystal pumped by multi-Watt MOPA lasers at 1064 nm

“…The excellent beam quality of the master oscillator was well preserved during the amplification, resulting in a measured M 2 = 1.2 at the maximum available pump power. Given the SrWO 4 Raman gain bandwidth �ν s = 3 cm 1 [8], assuming homogeneous broadening and Lorentzian shape of spontaneous Raman scattering spectrum [12], the corresponding vibrational phase relaxation time can be estimated as T s = (πc�ν S ) −1 ≃ 3.5 ps, hence pump pulse duration was long enough to satisfy the steady-state Raman gain approximation ( t p ≫ T s ). The pump beam was collimated to a spot radius w in ~ 1.1 mm (at 1/e 2 of the intensity) by a f 1 = 400-mm spherical lens (see Fig.…”