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本文利用光导纤维中光速的测定原理,采用一种方波调制信号,应用具有异或逻辑功能的门电路进行相差测量的巧妙方法得到光在光导纤维中的传输速度,再利用,从而快速测得光纤的折射率[1]。
In this paper, the principle of measuring the speed of light in optical fiber, the use of a square wave modulation signal, the application of the door with XOR logic function to measure the difference between the smart way to get the light in the optical fiber transmission speed, and then quickly measured Refractive index of optical fiber [1].