Optical triplexers are disclosed. The optical link increases the noise immunity of electrical interconnections, and allows the memory device to be placed a greater distance from the processor than is conventional without power-consuming IO buffers. The gate rotor has gates meshing with the helical grooves of the screw rotor to compress gas in compression chambers to discharge the gas from the discharge port after being compressed. This Abstract is provided for the sole purpose of complying with the rules that allow a reader to quickly ascertain the subject matter of the disclosure contained herein.