title: Efficient yellow-green light generation at 561 nm by frequency-doubling of a QD-FBG laser diode in a PPLN waveguide.
abstract: A compact high-power yellow-green continuous wave (CW) laser source based on second-harmonic generation (SHG) in a 5% MgO doped periodically poled congruent lithium niobate (PPLN) waveguide crystal pumped by a quantum-dot fiber Bragg grating (QD-FBG) laser diode is demonstrated. A frequency-doubled power of 90.11 mW at the wavelength of 560.68 nm with a conversion efficiency of 52.4% is reported. To the best of our knowledge, this represents the highest output power and conversion efficiency achieved to date in this spectral region from a diode-pumped PPLN waveguide crystal, which could prove extremely valuable for the deployment of such a source in a wide range of biomedical applications.
authors.forename: Ksenia A
authors.initials: KA
authors.lastname: Fedorova
authors.forename: Grigorii S
authors.initials: GS
authors.lastname: Sokolovskii
authors.forename: Maksim
authors.initials: M
authors.lastname: Khomylev
authors.forename: Daniil A
authors.initials: DA
authors.lastname: Livshits
authors.forename: Edik U
authors.initials: EU
authors.lastname: Rafailov