Experimental demonstration of adaptive-soliton transmission gain

Demonstrate experimentally the predicted transmission gain of adaptive solitons propagating in normal-dispersion waveguides.

Background

The paper introduces adaptive solitons arising from frequency-comb-induced stimulated Brillouin scattering resonance (SBSR). The theoretical model predicts that bright adaptive solitons in normal-dispersion waveguides can possess a positive, power-dependent transmission gain that counteracts waveguide attenuation and can stabilize the soliton at a constant power during long-distance propagation.

Although the paper experimentally demonstrates an adaptive-soliton laser and measures properties such as down-chirp, pulse shape, and stability, it does not experimentally verify the predicted transmission gain in a normal-dispersion waveguide. Establishing this effect is important because the authors connect it to potentially lossless propagation and repeaterless long-haul soliton communication.