Abstract
Many single-mode fiber coherent communication and sensing systems find a need for polarization control either for increased performance or for signal processing. In the past, most systems achieved polarization control either through in-line fractional wave polarization controllers or through the use of bulk optic polarization components [1]. In this work, we present a new approach to in-line polarization control through the use of a recirculating fiber delay line (RDL) system. The proposed device is less bulky than comparable fractional wave devices and shows potential for integrated optic implementation. It has the added advantage of having considerable polarization effect controllability, and thus its use may extend beyond simple polarization state azimuth control. The theoretical development for this system is contained elsewhere [2]; in this presentation we will concentrate on the experimental confirmation of its operation as a polarization rotator.
© 1992 Optical Society of America
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