Abstract
AbstractA high power narrow-linewidth nanosecond all-fiber laser based on the master oscillator power amplifier (MOPA) configuration is demonstrated. A pulsed seed with high repetition rate of 10 MHz was generated by modulating a continuous-wave (CW) single-frequency fiber laser at $\sim $1064 nm by using an electro-optic intensity modulator (EOIM). After multi-stage cascaded power amplification, the average power was boosted to be kilowatt level. The pulses from the main amplifier had a pulse width of $\sim $3 ns and an average/peak power of 913 W/28.6 kW. Further power scaling of the pulses was limited by stimulated Raman scattering (SRS) for the moment, method for SRS suppression and further power scaling was briefly discussed.
Highlights
High power narrow-linewidth nanosecond lasers have attracted much attention for a range of applications such as LIDAR[1,2,3], nonlinear frequency conversion[4,5,6], and coherent beam combinations[7,8,9]
Email: xuxj@21cn.com paper, we report a kilowatt-level narrow-linewidth nanosecond laser for the first time, to the best of our knowledge
Narrow-linewidth nanosecond pulses with high average power of 913 W were generated from a monolithic all-fiber master oscillator power amplifier (MOPA) laser system
Summary
High power narrow-linewidth nanosecond lasers have attracted much attention for a range of applications such as LIDAR[1,2,3], nonlinear frequency conversion[4,5,6], and coherent beam combinations[7,8,9]. For nonlinear frequency conversion applications such as the optical parametric oscillator (OPO)[10, 11] and second-harmonic generation (SHG)[5, 6], narrow-linewidth pulses can offer high conversion efficiency. Narrow-linewidth lasers are desirable for coherent beam combinations, which are a promising way to scale the overall output power while maintaining the beam quality[12,13,14,15].
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