Non-centrosymmetric tetragonal Sr2ZnGe2O7- a novel melilite-type nonlinear-laser crystal offeringχ(2)-,χ(3)-, and cascadedχ(3)↔χ(2)-interactions
Year: 2010
Type: article
Abstract: Nonlinear optical interactions based on χ (2) and χ (3) effects were investigated in the tetragonal, non-centrosymmetric melilite-type crystal Sr 2 ZnGe 2 O 7 . Among them are Stokes and anti-Stokes lasing comb generation, SHG, THG, SFG, and cascaded χ (3) ↔ χ (2) self-frequency conversion, arising from one-micron picosecond pumping. All lasing components were identified and attributed to a single SRS-promoting vibration mode ω SRS ≈ 778 cm -1 . The crystals possess a wide transparency range from ≈ 0.25 μm to ≈ 6.2 μm; their refractive indices show a small birefringence (with an isoindex point at 0.4677 μm wavelength) that does not allow phase matching for χ (2) -based conversion processes.
Source: Laser Physics Letters
Authors: P. Becker, L. Bohatý, J. Liebertz, H.-J. Kleebe, M. Müller, H.J. Eichler, H. Rhee, J. Hanuza, A.A. Kaminskii
Language: English
Subfield: Electrical and Electronic Engineering
Field: Engineering
Domain: Physical Sciences
Open Access status: bronze
OpenAlex ID: W2048752405