An optical connector includes a first optical-electric coupling element, a second optical-electric coupling element, and a fixing device. The continued application of increased temperature at reduced pressure causes the deposited carbon to diffuse below the surface of the steel towards the core resulting in a carburized low alloy steel product with increased hardness, ductility and improved resistance to corrosion. A switching control circuit includes a filter capacitance connected between the feedback node and ground, and a comparator which compares a feedback voltage Vfb with a fixed voltage Vref; at least one of Ton and Toff is a \u201cmodulated\u201d interval which is terminated when Vfb crosses Vref due to the discharge of the filter capacitance. The spacers couple with the arms; are oriented along a direction perpendicular to the first direction; and space the arms apart by the width of the coolers. After being issued by the first issue queue, the counter associated with each instruction is decremented during each instruction cycle until the instruction is executed by one of the execution units.