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提出了一种用光纤测量气体折射率的原理和方法，并设计制作了测量装置。它的突出优点是测量值的范围不受限制，原理简单，而且具有较高的测量精度。填补了气体折射率不易测量的空白。
A principle and method for measuring the refractive index of gas using optical fiber are proposed, and a measuring device is designed and manufactured. Its outstanding merit is that the range of the measurement value is not limited, the principle is simple, and has higher measurement precision. Fill the gas refractive index is not easy to measure the gap.