학술논문
Microwave Photonic Interferometric System for Monitoring Delay and Temperature of Optical Cables deployed in Radio Telescope Arrays
Document Type
Conference
Author
Source
2023 International Topical Meeting on Microwave Photonics (MWP) Microwave Photonics (MWP), 2023 International Topical Meeting on. :1-4 Oct, 2023
Subject
Language
ISSN
2768-346X
Abstract
The on-field validation of a fiber delay monitoring system (FDMS) based on a microwave Michelson’s interferometer operating over optical fiber is presented. The FDMS has been designed for monitoring the impact of optical cables installed in radioastronomy applications. The system was tested in the second version of the Aperture Array Verification System (AAVS), which represents the prototype for the upcoming low frequency radioastronomy plant Square Kilometre Array (SKA-Low), installed on site at the Murchison Radio Observatory, in Western Australia. The FDMS has been used to monitor two different typologies of cable installation: Surface Laid and Underground Buried. This work shows that the behavior of the delay measurement agrees with the measured average temperature of the cable, which depends on several aspects other than the air temperature. The FDMS can be used also to estimate the average temperature effects of the fiber optic cables.