OZ Optics' Electrically Driven Polarization Controller (EPC) provides a simple, efficient means to manipulate the state of polarization within a single-mode fiber. Employing a novel mechanical fiber squeezing technique, the device is controlled by either three or four (depending on the model) input voltages that one varies over a ±5 volt range to provide endless polarization control in a robust, easy to operate package.

The controller's rapid response speed easily handles changes in polarization caused by the external environment, and is highly suitable for polarization scrambling for either averaging PDL effects, or for making PMD or PDL measurements. Because the fiber within the device is continuous, all insertion losses, return losses, and PDL effects are limited only by the fiber itself. This makes it ideal for precise test and measurement applications.