A method for controlling an amount of a liquid electrolyte in a polymer-electrolyte membrane of a fuel cell is provided. At least a pair of nozzle assemblies is disposed in the adapter body, each of nozzle assemblies having an inlet end in fluid communication with a source of liquid extruded material and an outlet end in the adapter body. The dispersion-shifted fiber also reduces a bending loss and a splice loss due to a mode field diameter difference between it and a conventional single mode fiber.