A system and method is provided for minimizing power fluctuations and crosstalk in a wavelength division multiplexed optical network employing dynamic adddrop techniques by utilizing amplifiers operating in a nearly linear region. The brake drum and the central gear are selectively rotatable in opposing first and second rotational directions. Processes can operate as publishers andor subscribers, and can reside on a WGM or a server. The antiparallel-pinned biasing layer has first and second ferromagnetic films separated by an antiferromagnetically-coupling film.