Abstract: In this paper, the synthetical analyses on the derivation of alignment in the application of the polarization optical technique are presented upon the main error sources of this technique. Consequently, a novel alignment system is developed to improve the alignment technique, which is composed of a combination of two parallel polarizers, bidirectional-double path, two detectors, and electrical signa processor. Using this system, we have realized accurate alignments between PM fibers and their in-line devices. !9
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