Distributed fiber optic sensing enabled self-coherent detection for data centers
AssigneeNEC Corporation
InventorsYue-Kai Huang, Ezra Ip
Life of this patent
Estimating the term…
Abstract
Aspects of the present disclosure describe distributed fiber optic sensing (DFOS) systems, methods, and structures that advantageously sense/monitor intra-data center operations using self-coherent detection. Advantageously, sensing signal(s) and data signal(s) are optically multiplexed such that the sensing signal(s) are generated and detected using the same optoelectronic components as data generation and detection while requiring only minimal changes to transponder arrangements and no additional bandwidth to digital-to-analog converters (DAC) or analog-to-digital converters (ADC).
Claims9
A dual-fiber, bidirectional, fiber optic communications link supporting distributed fiber optic sensing (DFOS), said communications link comprising:
- a pair of optical fibers optically connecting a pair of transponders, the pair of optical fibers configured such that one of the optical fibers of the pair conveys optical signals in one direction, while the other one of the optical fibers of the pair conveys optical signals in an opposite direction;
- wherein each individual one transponder of the pair of transponders is configured to perform self-coherent detection by using a local oscillator (LO) of the other one of the pair of transponders to perform demodulation;
- and
- each individual one transponder of the pair of transponders is configured to transmit data signals in a counter-propagating manner with respect to a LO used for demodulation;
- SAID COMMUNICATIONS LINK CHARACTERIZED BY:
- a DFOS interrogator in optical communications with the pair of transponders and optical fibers, said DFOS interrogator configured to generate sensing signals for transmission by one of the transponders, wherein the sensing signals are transmitted along with any transmitted data;
- wherein the sensing signals and the data signals are generated using a same digital-to-analog converter.
Dependencies are inferred from the claim text.