Manifestations of nonlinear optical effects in a novel SRS-active crystal-natural topaz, Al-2(F1-x(OH)(x))(2)SiO4: many-phonon chi((3))-lasing, more than sesqui-octave Stokes and anti-Stokes multi-wavelength comb lasing, cascaded and cross-cascaded chi((3)) %26lt;-%26gt; chi((3)) Raman-induced interactions under single- and dual-wavelength picosecond collinear coherent pumping, THG and combined SRS-promoting phonon modes

作者：Kaminskii A A^*; Lux O; Rhee H; Eichler H J; Yoneda H; Shirakawa A; Ueda K; Rueckamp R; Bohaty L; Becker P

来源：Laser Physics Letters, 2013, 10(7): 073001.

DOI：10.1088/1612-2011/10/7/073001

Natural crystals of topaz, Al-2(F1-x(OH)(x))(2)SiO4 were found to be an attractive Raman gain material and a subject for the investigation of different chi((3))-nonlinear optical effects. We present several manifestations of photon-phonon interactions related to SRS and RFWM processes initiated by picosecond excitations at room and cryogenic (approximate to 9 K) temperature. Among them are octave-spanning Stokes and anti-Stokes generation in the visible and near-IR spectral range, combined SRS-active phonon modes, cross-cascaded up-conversion, chi((3)) %26lt;-%26gt; chi((3)) lasing, as well as THG via self-sum frequency parametric generation. All recorded Raman-induced lasing lines are identified and attributed to the promoting chi((3))-vibration transitions. Based on the experimental data, theoretical simulations employing Fourier analysis are performed to demonstrate the potential of wide SRS frequency combs in terms of ultra-short pulse generation.

• 出版日期2013-7