Numerical Simulation of High-Power Optical Amplifiers at 2.3 µm Based on a Special Multicore Fiber

The development of high-power laser sources at 2.3 µm is highly demanded for remote sensing and other applications. However, this wavelength poorly covered by present-day lasers. To obtain 100 W class radiation μm, we propose to use simultaneously cascade amplification 2 with a commercially available diode pump 793 nm stimulated Raman scattering between the amplified signal waves in special zinc–tellurite multicore fiber ten trivalent-thulium-ion-doped cores arranged ring. We demonstrate numerically that an out-of-phase supermode (with spatial phases differing π neighboring cores) can provide up 50% efficiency conversion from wave.