Systems and methods of wirelessly transmitting user data are provided. A voltage is applied between the tip of the flying electrode and an electrically conductive material of an organic EL substrate to form an electrostatic field, and the tip of the flying electrode and the organic EL substrate are shifted relative to one another in at least one of a perpendicular direction and a horizontal direction. The inputoutput buffer circuit is operated in synchronization with the internal dock signal. A support pad and a guide bar are disposed on a generally cylindrical outer peripheral surface of the cutting head and are arranged in circumferentially spaced relationship to one another. A dual path transmit and receive optical link is provided between near and far end WDM’s. A guide member is supported by the support member through press fitting of a one-end portion.