Patent ID: 7903976

Claim:
An optical element integrated module comprising: first through n-th (n being an integer equal to or more than two) optical circulators respectively comprising a first, second and third port, each of the optical circulators being arranged so as to output from the second port an optical signal input through the first port, to output from the third port an optical signal input through the second port and to output from the first port an optical signal input through the third port; an optical clock signal split section for generating first through n-th optical short pulse trains by splitting an optical short pulse train that is input externally; first through n-th optical/optical converters for outputting first through n-th modulated optical data signals by respectively modulating the first through n-th optical short pulse trains in accordance with respective first through n-th optical data signals; and an optical time division multiplexing section for generating optical time division multiplexed signals by time division multiplexing the first through n-th modulated optical data signals; wherein the first through n-th optical data signals are respectively externally input to the first port of the respective first through n-th optical circulators and input to the respective first through n-th optical/optical converters via the second port; and the first through n-th modulated optical data signals are respectively input to the second port of the respective first through n-th optical circulators and input to the optical time division multiplexing section via the third port.