20 Watt single-frequency 509 nm laser by single-pass second harmonic generation in an LBO crystal
Lu Han,
Xin Zeng,
Xin Cheng
et al.
Abstract:High power 509 nm continuous-wave (CW) lasers have important applications in science and communication. Here we demonstrate a robust high-power single-frequency 509 nm laser system based on nonlinear phase demodulation technique and single-pass second harmonic generation (SHG) configuration. In experiments, the single-frequency fundamental wave at 1018 nm was linewidth-broadened by an electro-optical modulator and then amplified to 207 W in a ytterbium-doped fiber amplifier. In subsequent single-pass SHG stage… Show more
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