Optical interconnection arrangement for high speed, high density communication systems
First Claim
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1. An optical interconnection arrangement for transmitting high speed data signals, the arrangement comprising:
- a transmitting component associated with a first processing node for converting an electrical high speed data signal into an optical data signal;
an optical transmission channel coupled to the output of the transmitting component; and
a receiving component associated with a second processing node and coupled to the output of the optical transmitting channel for receiving the optical data signal and re-converting the received optical data signal into the original electrical high speed data signal, whereinthe transmitting component comprises;
a phase alignment element responsive to a plurality of N of parallel data signals and an electrical clock signal to create as an output a plurality of parallel, phase-aligned data signals;
a first optical modulator responsive to the plurality of N parallel phase-aligned data signals and a continuous wave (CW) optical signal to create a pulse amplitude modulated (PAM) optical data signal representative of the plurality of N parallel phase-aligned data signals; and
a second optical modulator responsive to the electrical clock signal and a CW optical signal to create an optical clock output signal; and
the receiving component comprises;
a first optical/electrical (O/E) conversion device responsive to the received PAM optical data signal to create an electronic version thereof;
a second O/E conversion device response to the received optical clock signal to create an electronic version thereof; and
an A/D converter responsive to the outputs of the first and second O/E conversion devices to recover the original plurality of N parallel data signals therefrom.
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Abstract
An optical interconnection arrangement for use in high data applications is presented that eliminates the need for extensive serialization/de-serialization (SERDES) functionality by utilizing pulse amplitude modulation (PAM) techniques to represent the data in the optical domain while utilizing a separate channel for transmitting an optical clock signal, eliminating the need for clock recovery circuitry on the receive end of the arrangement.
24 Citations
10 Claims
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1. An optical interconnection arrangement for transmitting high speed data signals, the arrangement comprising:
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a transmitting component associated with a first processing node for converting an electrical high speed data signal into an optical data signal; an optical transmission channel coupled to the output of the transmitting component; and a receiving component associated with a second processing node and coupled to the output of the optical transmitting channel for receiving the optical data signal and re-converting the received optical data signal into the original electrical high speed data signal, wherein the transmitting component comprises; a phase alignment element responsive to a plurality of N of parallel data signals and an electrical clock signal to create as an output a plurality of parallel, phase-aligned data signals; a first optical modulator responsive to the plurality of N parallel phase-aligned data signals and a continuous wave (CW) optical signal to create a pulse amplitude modulated (PAM) optical data signal representative of the plurality of N parallel phase-aligned data signals; and a second optical modulator responsive to the electrical clock signal and a CW optical signal to create an optical clock output signal; and the receiving component comprises; a first optical/electrical (O/E) conversion device responsive to the received PAM optical data signal to create an electronic version thereof; a second O/E conversion device response to the received optical clock signal to create an electronic version thereof; and an A/D converter responsive to the outputs of the first and second O/E conversion devices to recover the original plurality of N parallel data signals therefrom. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification