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Updated: Jul 12, 2025

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High Speed Sub-GHz Spectrometer for Brillouin Scattering Analysis
Published on: December 22, 2015
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Enabling cost-effective high-performance vibration sensing in digital subcarrier multiplexing systems.
Optics Express
|October 20, 2023
Summary
This study integrates digital linear frequency modulated sensing signals into digital subcarrier multiplexing (DSCM) signals for simultaneous communication and sensing. The cost-effective method supports high-speed data transmission and sensitive distributed acoustic sensing.
Area of Science:
- Optical communication networks
- Integrated sensing and communication systems
Background:
- Digital Subcarrier Multiplexing (DSCM) offers spectral flexibility for short-reach communication.
- Coherent architectures are compatible with DSCM, enabling cost-sensitive integrated sensing and communication.
Purpose of the Study:
- To propose a spectrally integrated scheme for simultaneous sensing and communication using a shared transmitter.
- To demonstrate the feasibility of integrating digital linear frequency modulated sensing signals into DSCM signals.
Main Methods:
- Spectrally integrating digital linear frequency modulated sensing signals into DSCM signals.
- Utilizing a shared transmitter for both communication and sensing functionalities.
- Demonstrating high-speed data transmission with dual-polarization quadrature phase-shift keying (DP-QPSK) and dual-polarization 16-ary quadrature amplitude modulation (DP-16QAM).
Main Results:
- Achieved 100-Gb/s DP-QPSK and 200-Gb/s DP-16QAM transmission.
- Demonstrated distributed acoustic sensing sensitivity of 69 µε/Hz and 88 µε/Hz.
- Maintained a spatial resolution of 4 meters for sensing.
Conclusions:
- The proposed cost-effective scheme enables simultaneous communication and sensing.
- The integration of sensing signals into DSCM is effective for advanced optical networks.
- This approach is suitable for future integrated sensing and communication applications.
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