Optisches Telekommunikationsnetzwerk und Verfahren zum Betrieb davon

Details

Veröffentlichungs-Nr.

EP4769976

Anmeldetag

30. Dezember 2024

Veröffentlichung

1. Juli 2026

Rechtsraum

EP

Abstract

An optical telecommunications network (100) comprising a/an: Ultra-Stable Signal Optical Source, USS-OS (105), for generating an Ultra-Stable Optical Signal (130), USOS; first Interferometric Stabilisation Device (110-1), ISD, connected to the USS-OS; second ISD (110-2) arranged remotely to the USS-OS and the first ISD; first Optical Link (120-1), OL, connecting an output of the first ISD to a first endpoint (115-1), wherein said first OL is bidirectional; second OL (120-2) connecting the USS-OS to the second ISD; and bridging OL (160-1) arranged proximate the first endpoint and configured to connect the first OL to the second ISD; wherein: the first ISD is configured to: receive, as an input, the USOS from the USS-OS (310); output, to the first OL, a first modified USOS (260-1) by performing a first frequency shift upon the input USOS (320); determine a first Noise Value, NV, associated with the first OL from interferometric processing of the USOS and a first return USOS (265-1), from the first endpoint, or proximate thereto, of the first modified USOS; and subsequently correct the first modified USOS by modifying the first frequency shift so as to counteract the determined first NV, thereby to output a first corrected USOS (370); and the second ISD is configured to: receive (510), as an input, a: from the bridging OL, first noisy USOS (420-1) that is the first modified USOS (260-1) as affected by the first NV due to the first OL; and a second noisy USOS (405-2) that is the USOS as affected by a second NV due to the second OL; generate a second modified USOS (260-2) by performing a second frequency shift, different to the first frequency shift, upon the second noisy USOS (520); determine the second NV from interferometric processing of the first noisy USOS and the second modified USOS; and subsequently correct (560) the second modified USOS by modifying the second frequency shift so as to counteract the determined second NV, thereby to output a second corrected USOS (420-2).

Anmelder

Firma

British Telecommunications Public Limited Company

Land

🇬🇧 Großbritannien