title: Dual-loss-modulated Q-switched mode-locked laser intracavity pumped temperature-tuned subnanosecond KTiOPO4 optical parametric oscillator.
abstract: Using an acousto-optic modulator (AOM) and Cr4+:YAG as the dual-loss modulation, an intracavity KTiOPO4 optical parametric oscillator (OPO) pumped by a simultaneously Q-switched and mode-locked (QML) YVO4/Nd:YVO4 laser was realized. The shortest mode-locking pulse duration of the signal wave at 1573 nm was directly measured as 450 ps at an AOM frequency of 2 kHz and a diode pump power of 10.5 W, corresponding to a peak power of 35.5 kW. The temperature tuning of the output signal wavelength was realized in the range from 1571.99 to 1572.61 nm with a blueshift ratio of 0.027  nm/°C. A set of coupled rate equations for the dual-loss-modulated QML laser pumping intracavity OPO was built for the first time to our knowledge. The numerical solutions were fitted with the experimental results.
authors.forename: Hongwei
authors.initials: H
authors.lastname: Chu
authors.forename: Jia
authors.initials: J
authors.lastname: Zhao
authors.forename: Kejian
authors.initials: K
authors.lastname: Yang
authors.forename: Shengzhi
authors.initials: S
authors.lastname: Zhao
authors.forename: Dechun
authors.initials: D
authors.lastname: Li
authors.forename: Tao
authors.initials: T
authors.lastname: Li
authors.forename: Guiqiu
authors.initials: G
authors.lastname: Li
authors.forename: Wenchao
authors.initials: W
authors.lastname: Qiao
mesh_terms: D053844:Lasers, Solid-State; D055620:Optical Phenomena; D010710:Phosphates; D013696:Temperature; D014025:Titanium
chemical_list: D010710:Phosphates; C064806:potassium titanylphosphate; D014025:Titanium