System for continuous evaluation of optical path asymmetry

Michal Špaček; Josef Vojtěch; Jaroslav Roztočil

doi:10.1117/12.2678936

20 October 2023 System for continuous evaluation of optical path asymmetry

Michal Špaček, Josef Vojtěch, Jaroslav Roztočil

Proceedings Volume 12686, Infrared Remote Sensing and Instrumentation XXXI; 126860Q (2023) https://doi.org/10.1117/12.2678936
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Conference Poster

Abstract

Precise time and stable radio frequency dissemination is becoming standard application in optical networks. The White Rabbit system is commonly used for this purpose to support applications that require precise time and a stable frequency signal. Optical fibers are preferred for distributing the precise time and frequency signal in this system. To achieve best results, i.e. determine absolute offsets, it is necessary to know the asymmetry of the optical transmission path in which the system is deployed. We developed a device based on a MEMS optical switch that measures the delay of the optical path in both the forward and reverse directions. These measurements are used to continuously evaluate changes in the asymmetry of the transmission path, and the resulting asymmetry can be used to calibrate the time transfer system.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Michal Špaček, Josef Vojtěch, and Jaroslav Roztočil "System for continuous evaluation of optical path asymmetry", Proc. SPIE 12686, Infrared Remote Sensing and Instrumentation XXXI, 126860Q (20 October 2023); https://doi.org/10.1117/12.2678936

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