Patent ID: 7492981
Filing Date: 2009-02-17
Classification: G02B,G06F

Abstract:
1. An apparatus, comprising: a Large Scale Integrated Circuit (LSI) apparatus including a semiconductor device, a plurality of first and second photodiodes formed at the semiconductor device, and electrical clock output terminals formed at the semiconductor device, each of the electrical clock output terminals being electrically connected to the first and second photodiodes, the first and second photodiodes independently sensing first and second short optical pulse trains which have different phases and are incident from the outside of the LSI apparatus and converting the first and second short optical pulse trains to first and second electric current pulse trains, respectively, and the first and second electric current pulse trains being supplied to each of the electrical clock output terminals so that each of the electrical clock output terminals generates an electric clock pulse supplied to the semiconductor device, wherein the LSI apparatus further includes an input port configured to input an optical beam in which the first and second short optical pulse trains are multiplexed, a demultiplexer configured to de-multiplex the optical beam into the first and second short optical pulse trains, an optical guide configured to guide the optical beam to the demultiplexer from the input port.