Optical communication apparatus and pcb including optical interface for realizing concurrent read and write operations

An optical communication apparatus comprising:

• an optical waveguide configured to carry an optical signal of first data and receive an optical signal of second data simultaneously;
• a light source configured to convert the first data from an electrical signal to the optical signal of the first data, the optical signal of the first data having a first polarization;
• a polarization beam splitter configured to separate the optical signal of the first data from the optical signal of the second data according to at least the first polarization;
• and
• a photodetector configured to convert the optical signal of the second data to an electrical signal,
• wherein the optical signal of the second data has a second polarization, and the first polarization and the second polarization are orthogonal to each other.

A printed circuit board connected with a memory module, the printed circuit board comprising:

• a processing unit configured to output at least one of a read command, a write command and write data;
• an optical interface configured to convert the read command, the write command and the write data to optical signals and to transmit the optical signals;
• an address/command bus configured to carry the optical signals of the read command and the write command;
• and
• a data bus configured to simultaneously carry the optical signal of the write data and an optical signal of read data corresponding to the read command between the processing unit and the optical interface,
• wherein the printed circuit board is configured to access a target memory module according to a wavelength corresponding to the target memory module.