High-efficient stimulated-Raman scattering in ferroelectric and ferroelastic orthorhombic Gd2(MoO4)3 crystals

Abstract

New nonlinear properties of the orthorhombic ferroelectric and ferroelastic Gd2(MoO4)3 crystals, the ability for efficient (up to 70%) generation of multiple (up to fourth) Stokes emission and creation of filament optical channeling, are observed. Gd2(MoO4)3 crystals with Ln3+ ions are supported to be also good candidates for lasers with self‐stimulated Raman scattering. For KY(WO4)2, KGd(WO4)2, and NaLa(MoO4)2 crystals new Stokes wavelengths were excited, too.

Laser crystals and ceramics: recent advances

“…The discovery of SRS potential in several widely used insulating laser host crystals (e.g. monoclinic α-KGd(WO 4 ) 2 and α-KY(WO 4 ) 2 [329,335,338], tetragonal YVO 4 and GdVO 4 [354,355], trigonal LiCaAlF 6 [307], and the γ-ray scintillator PbWO 4 [327,369]), as well as novel very promising SRS materials with unique physical properties -polycrystalline [720] and single crystal [721] CVD (SC-CVD) diamonds has led to a renewed interest in crystalline www.lpr-journal.org Raman laser converters. Experimentally measured Raman laser frequency shifts for numerous known SRS-active inorganic and organic crystalline materials range from ∼ 60 to ∼ 3200 cm −1 (Table 13).…”

New Manifestation of Nonlinear Properties of Acentric Trigonal LaBGeO5and Orthorhombic Gd2(MoO4)3Laser Crystal-Hosts: Multiple Stokes and Anti-Stokes SRS and SHG Due to Cerenkov-Type Phase Matching

“…Α not less interesting nonlinear interaction, the self-stimulated Raman scattering, is also exhibited by laser crystals having considerable cubic nonlinear susceptibility (χ(3)). Recently we showed that two acentric LaBGeO5 and Gd2(MoO4)3 laser-crystal hosts offer simultaneously relatively high (χ( 2 )) and (χ(3)) nonlinearities, which allow one to apply them both in second harmonic generators of one-micron emission of neodymium lasers [2,3] and in crystalline laser Raman shifters [4].…”

Piezoelectric Sillenite Bi12SiO20:Nd3+. A New Laser and SRS-Active Crystal

“…This crystal presents also piezoelectric and electrooptical properties, large isotropic optical activity [3] and palpable c (2) -nonlinearity for non-birefringent phase-matching SHG [4] and is therefore attractive for many applications [5]. In the present note we report the first experimental observation of laser action and stimulated Raman scattering (SRS) À1 is the linewidth of spontaneous Raman scattering line corresponding to the SRS-active vibration mode) were registered using a spectral analyzing system based on Si-CCD array sensor [7].…”