Thin film micro-optics has been used for mode stabilization in a compact, diode-pumped Nd-doped solid-state laser. SiO2-microlenses and SiO2:HfO2-multilayer micro-mirrors have been tested in different resonator configurations starting from a hemispherical geometry. By comparing the stability behavior with the case of a macroscopic mirror it has been demonstrated that similar operation characteristics at a reduced output power can be achieved with a miniaturized laser. The special design of the thin film micro-optics can be used to enhance the mode-selectivity by spatial as well as spectral filtering with non-spherical phase distributions and profiled multilayer systems.
(140.3410) Lasers and laser optics : Laser resonators
(140.3480) Lasers and laser optics : Lasers, diode-pumped
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3580) Lasers and laser optics : Lasers, solid-state
R. Grunwald, U. Griebner, J. Huschke, and H. Schönnagel, "Compact diode-pumped microlaser with mode-selective thin film micro-mirrors," in Advanced Solid State Lasers, M. Fejer, H. Injeyan, and U. Keller, eds., Vol. 26 of OSA Trends in Optics and Photonics (Optical Society of America, 1999), paper ME9.
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