Precursor beat length and spun period measurement of a spun fiber using polarization optical frequency domain reflectometry

In this Letter, a novel, to the best of our knowledge, nondestructive method for measuring the spun fiber parameters (precursor beat length and spun period) is presented both theoretically and experimentally. The proposed technique is based on analyzing the polarization optical frequency domain reflectometer traces. Experimental results are in agreement with the theoretical predictions.