Second harmonic generation around 0.53 µmof seededYb fibre system in periodically-poled lithium niobate

Abstract
Fibre-integrated, seeded, high-power Yb-doped fibre amplifiers have been used in combination with periodically-poled lithium niobate crystals in simple experimental configurations to give second harmonic generation to the visible both in CW and pulsed formats with conversion efficiencies as high as 41% in compact configurations.