SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 31: Precision Measurements: Atom Interferometry I (joint session Q/A)
Q 31.8: Talk
Wednesday, March 8, 2023, 12:45–13:00, F102
Analysis of polarization states in polarization maintaining optical fibers — •Johannes Bäuerlein1,2, Jonathan Joseph Carter1,2, and Sina Maria Koehlenbeck1,2 — 1Max Planck Institute for Gravitational Physics (Albert Einstein Institute), Callinstraße 38, 30167 Hannover, Germany — 2Institut für Gravitationsphysik der Leibniz Universität Hannover, Callinstraße 38, 30167 Hannover, Germany
Optical fibers proved to be a powerful tool for several applications in the field of laser optics. Here, we contemplate the use of polarization maintaining fibers in interferometric displacement sensors as a tool to minimize the difference of the optical paths of two signals. In an interferometer, a probe and a reference signal is required. Any disturbance that is not common will couple directly into the detected signal of the interferometer. It is therefore advantageous to minimize the difference in the optical path of the signals, we achieve this by sending the signals through the same fiber. To suppress interference between the signals before it is desired, the polarization of the signals must be orthogonal. Therefore, we will study the crosstalk between the two polarization states inside the fiber and its coupling to induced phase noise. We present an optical setup that allows us to measure the strength of the noise due to the crosstalk of polarization states in a fiber. The phase fluctuations will be compared in real time before and after coupling to the fiber, and the differential measurement serves as a monitor of induced noise by the fiber.