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Incoherently pumped lasing and self-pumped three-wave mixing in laser-active whispering-gallery resonators

: Herr, Simon J.; Buse, Karsten; Breunig, Ingo


Kudryashov, Alexis V. (Hrsg.) ; Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Laser Resonators, Microresonators, and Beam Control XX : 27 January - 1 February 2018, San Francisco, California, United States
Bellingham, WA: SPIE, 2018 (Proceedings of SPIE 10518)
Paper 105180U, 7 pp.
Conference "Laser Resonators, Microresonators, and Beam Control" <20, 2018, San Francisco/Calif.>
Conference Paper
Fraunhofer IPM ()
whispering Gallery Resonator; nonlinear optic; harmonic generation; Laser

We report lasing at 1064 nm in an LED-pumped high-Q whispering-gallery resonator (WGR) made from Nd:YVO4. A single LED is sufficient to achieve quasi-cw operation. Furthermore, self-pumped three-wave-mixing is demonstrated in high-Q WGRs made from laser-active lithium niobate. When pumping the resonator with a free-running laser diode without any external frequency stabilization, self-frequency doubling of the 1.08-μm laser line into the green spectral region is observed. With the application of quasi-phase matching techniques, the nonlinear optical processes can be selected at will, which enables compact and versatile self-pumped frequency synthesizers. As a proof-of-principle experiment, self-pumped optical parametric oscillation is demonstrated in a radially poled WGR made from neodymium-doped lithium niobate.