Optical element integrated module

1. 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.

2. The optical element integrated module according to claim 1 , wherein each of the first through n-th optical/optical converters is a modulator utilizing cross absorption modulation.

3. The optical element integrated module according to claim 1 , wherein the first through n-th optical circulators are disposed between the first through n-th optical/optical converters and the optical time division multiplexing section.

4. The optical element integrated module according to claim 1 , further comprising an optical phase adjustment section for modulating the phase of each or several of the first through n-th modulated optical data signals.

5. The optical element integrated module according to claim 1 , wherein

n is 4;

the frequency of the optical short pulse train is 40 GHz;

the frequency of the first through n-th optical short pulse trains is 40 GHz;

the data rate of the first through n-th optical data signals is 40 Gbps; and

each of the optical time division multiplexed signals contains an optical signal having a data rate of 160 Gbps.

6. An optical element integrated module comprising:

first through n-th (n being an integer equal to or more than two) input 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;

first through n-th output optical circulators respectively comprising a fourth, fifth and sixth port and being arranged so as to output from the fifth port an optical signal input through the fourth port, to output from the sixth port an optical signal input through the fifth port and to output from the fourth port an optical signal input through the sixth port;

first through n-th optical/optical converters; and

an optical time division multiplexed signal split section for generating optical time division multiplexed signals by splitting an optical time division multiplexed signal that is input externally; wherein

first through n-th optical short pulse trains are respectively externally input to the first port of the respective first through n-th input optical circulators and input to the respective first through n-th optical/optical converters via the second port;

first through n-th optical time division multiplexed signals are respectively input to the fifth port of the respective first through n-th output optical circulators and input to the respective first through n-th optical/optical converters via the sixth port;

the first through n-th optical/optical converters output respective first through n-th modulated optical data signals by modulating the respective first through n-th optical short pulse trains in accordance with the respective first through n-th optical time division multiplexed signals; and

the first through n-th modulated optical data signals are respectively input to the sixth port of the respective first through n-th output optical circulators and is output externally via the fourth port.

7. The optical element integrated module according to claim 6 , wherein each of the first through n-th optical/optical converters is a modulator utilizing cross absorption modulation.

8. The optical element integrated module according to claim 6 , wherein

the first through n-th optical/optical converters are disposed between the first through n-th input optical circulators and the first through n-th output optical circulators; and

the first through n-th output optical circulators are disposed between the first through n-th optical/optical converters and the optical time division multiplexed signal split section.

9. The optical element integrated module according to claim 6 , wherein

n is 4;

the frequency of the first through n-th optical short pulse trains is 40 GHz;

the data rate of the optical time division multiplexed signal is 160 Gbps;

the data rate of the first through n-th optical time division multiplexed signals is 160 Gbps; and

the data rate of the first through n-th modulated optical data signals is 40 Gbps.