@article{BAO2025, 
author = {Wurihan BAO and Shiguo ZHU},
title = {THE STRUCTURE AND THEORETICAL ANALYSIS OF A NOVEL OPTICAL FIBER LENGTH MEASUREMENT SYSTEM BASED ON XOR LOGIC},
year = {2025},
journal = {Physics and Engineering},
volume = {35},
number = {5},
pages = {337-342},
keywords = {reference signal, regenerated signal, fiber-optic length sensor, dual-slope analog-to-digital converter},
url = {https://www.sciopen.com/article/10.26599/PHYS.2025.9320548},
doi = {10.26599/PHYS.2025.9320548},
abstract = {This study shows the operating principle of a new digital system for measuring optical fiber length. The system combines an exclusive-OR (XOR)-based fiber-optic length sensor with a dual-slope analog-to-digital converter (ADC). The sensor receives two input signals: a reference signal from the transmitting end and a regenerated signal from the receiving end. Both signals are square waves with a period of T and a 50% duty cycle. The DC level of the sensor output varies linearly with the actual fiber length. Digital length measurement is conducted by using the dual-slope ADC to perform analog arithmetic operations, including addition, subtraction, multiplication, and division.}
}