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Multiplexing of Michelson interferometer sensors in a matrix array topology
Applied Optics
|November 2, 2010
Summary
We demonstrate a matrix array for multiplexing reflective interferometric sensors using frequency-division multiplexing (FDM) and combined FDM/time-division multiplexing. This approach enhances network performance and laser signal isolation for sensor applications.
Area of Science:
- Optoelectronics
- Sensor Technology
- Signal Processing
Background:
- Interferometric sensors offer high sensitivity but multiplexing them presents challenges.
- Existing multiplexing techniques may have limitations with reflective sensor configurations.
Purpose of the Study:
- To evaluate a matrix array topology for multiplexing reflective interferometric sensors.
- To investigate the performance of frequency-division multiplexing (FDM) and combined FDM/time-division multiplexing (TDM).
Main Methods:
- Implementation of a matrix array topology for sensor network.
- Application of frequency-division multiplexing (FDM) for signal separation.
- Integration of time-division multiplexing (TDM) with FDM to enhance performance.
Main Results:
- Identified a power limitation unique to reflective sensors in FDM topologies with continuous wave (cw) sources.
- Demonstrated improved multiplexing gain by combining FDM and TDM.
- Achieved enhanced isolation of laser sources from reflective sensor signals.
Conclusions:
- The matrix array topology is effective for multiplexing reflective interferometric sensors.
- Combining FDM and TDM offers significant advantages in multiplexing gain and signal isolation.
- This multiplexing strategy addresses limitations of purely FDM approaches for reflective sensors.
