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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
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Simultaneous distributed acoustic sensing and communication over a two-mode fiber.
Optics Letters
|December 20, 2022
Summary
We developed a dual-purpose optical fiber system for simultaneous data transmission and vibration sensing. This distributed acoustic sensing (DAS) technology achieves high signal quality and data rates up to 4.2 Gb/s.
Area of Science:
- Photonics and Optical Communications
- Sensing Technologies
Background:
- Traditional optical fibers struggle to balance data transmission and sensing capabilities.
- Co-existing communication and sensing in a single fiber presents significant technical challenges.
Purpose of the Study:
- To design and validate a novel distributed acoustic sensing (DAS) system integrated with optical communication.
- To demonstrate simultaneous data transmission and vibration detection using a two-mode fiber (TMF).
Main Methods:
- Utilized a photonic lantern to excite both LP01 and LP11a modes in a TMF.
- Implemented on-off keying (OOK) and orthogonal frequency-division multiplexing (OFDM) for data transmission.
- Collected backscattered Rayleigh light for vibration detection.
Main Results:
- Achieved high signal-to-noise ratio (SNR) values consistently above the minimum 2 dB threshold.
- Demonstrated parallel sensing and OFDM transmission with a data rate of 4.2 Gb/s.
- Reported a bit error rate (BER) of 3.2 × 10⁻³ for the combined system.
Conclusions:
- The developed TMF-based DAS system successfully co-exists with high-speed optical communication.
- This integrated approach offers a promising solution for efficient and simultaneous sensing and data transmission.
