A Novel Method for Extending Dynamic Range in Time-Division-Multiplexing Linear Sagnac Systems Based on Time Slot Insertion
The time-division multiplexed linear Sagnac sensing system significantly reduces the cost of interferometric fiber-optic sensor arrays and holds substantial potential for engineering applications. However, as the number of sensors in a time-division multiplexed array and the differences in the lengt...
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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2025-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/11071703/ |
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| Summary: | The time-division multiplexed linear Sagnac sensing system significantly reduces the cost of interferometric fiber-optic sensor arrays and holds substantial potential for engineering applications. However, as the number of sensors in a time-division multiplexed array and the differences in the lengths of the channels increase, the dynamic range of the system decreases rapidly. This paper presents a method for shortening the pulse period to enhance the system’s dynamic range. It is mathematically proven that designing the pulse period based on the length differences of time-division multiplexed channels can prevent pulse overlap and further reduce the pulse period. The experimental results show that the system’s maximum detectable level increases by 10 dB, while the noise level decreases by 10 dB compared to the traditional method, resulting in a total dynamic range improvement of 20 dB. Moreover, this approach is not limited by the number of channels, which is significant for extending the dynamic range in various time-division multiplexing systems. |
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| ISSN: | 2169-3536 |