Design of photonic crystal fiber amplifier based on stimulated Brillouin amplification for orbital angular momentum

A probe made of amino acids is arranged in a linear chain and joined together by peptide bonds between the carboxyl groups adjacent acid residues. The sequence protein determined gene encoded genetic code. This can happen either before used cell, or as part control mechanisms. In order to transmit amplify high-purity orbital angular momentum mode, photonic crystal fiber amplifier based on stimulated Brillouin amplification proposed designed this paper. transmission properties are systematically analyzed using finite element method C-band. results show that support 66 modes, all values purity modes supported higher than 99.4%. By analyzing gain spectra with different topological charges, it found they have high coefficients (> 7 × 10<sup>–9</sup> m/W) which 4–5 orders magnitude existing OAM amplifiers best performance, thus signal be obtained. comprehensive performance superior optical doped rare-earth ions. makes long-distance mode stable accurate provides possibility for designing laser system.