  Dissipative Kerr solitons generated in high-Q optical microresonators provide
unique opportunities for different up-to-date applications. Increasing the
generation efficiency of of such signals is a problem of paramount importance.
We provided comprehensive analysis and found optimal conditions providing
maximal pump-to-comb conversion efficiency (up to 100\%) for the cases of a
free-running and self-injection-locked pump lasers. The dependence of the
optimal coupling rate on the pump power was revealed, in addition to the
trade-off relations balancing the efficiency and the comb line number. The
methods to increase the total comb power were also discussed.
