title: High-power multichannel PPMgLN-based optical parametric oscillator pumped by a master oscillation power amplification-structured Q-switched fiber laser.
abstract: We experimentally demonstrated a compact fiber laser-pumped multichannel PPMgLN-based optical parametric oscillator (OPO) generating total OPO output power of 15.8, 15.2, 14.2, 12.9, and 8.8 W with idler output power of 4.7, 4.3, 4.1, 3.3, and 2.1 W at the wavelength of 3.43, 3.63, 3.72, 3.83, and 3.99 μm, respectively. The OPO was pumped by a fully fiberized polarization maintaining (PM) ytterbium-doped pulsed fiber master oscillation power amplifier (MOPA) operating at 1064 nm at a repetition rate of 65 kHz with effective pump power of 28.7 W. The MOPA system was constructed with an acousto-optic Q-switched fiber laser seed and only one stage PM fiber amplifier without any free space components, which makes the pump system compact and stable in the long-term. Comparisons on efficiencies and signal wavelength shifts between different channels showed that the idler absorption was the main factor preventing high average-power OPO operation with long idler wavelength.
authors.affiliation: State Key Laboratory of Modern Optical Instrumentation, Department of Optical Engineering, Zhejiang University, Hangzhou 310027, China.
authors.forename: Tao
authors.initials: T
authors.lastname: Chen
authors.forename: Kaihua
authors.initials: K
authors.lastname: Wei
authors.forename: Peipei
authors.initials: P
authors.lastname: Jiang
authors.forename: Bo
authors.initials: B
authors.lastname: Wu
authors.forename: Yonghang
authors.initials: Y
authors.lastname: Shen
mesh_terms: D004867:Equipment Design; D005336:Fiber Optic Technology / Q000295:instrumentation*; D053844:Lasers, Solid-State; D008274:Magnesium; D009556:Niobium; D055100:Optical Fibers; D010087:Oxides; D015018:Ytterbium
chemical_list: D010087:Oxides; D009556:Niobium; C091692:lithium niobate; D008274:Magnesium; D015018:Ytterbium