556 NM light generation by frequency doubling of a diode laser amplifed Yb-doped fiber amplifer for precision spectroscopy of ytterbium atoms

We have developed a simple laser system for generation of coherent 556 nm light by using frequency doubling of a diode laser. 1112 nm light from an external cavity diode laser is amplified via Yb-doped fiber amplifier and 200 mW of the amplified light is injected to wave-guided MgO-doped PPLN, which produces a 30 mW green light. The frequency diode laser is stabilized to a resonance peak of a high-finesse cavity with finesse ~10000.