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1. (WO2017018885) A WELLBORE FIBRE OPTICAL COMMUNICATION SYSTEM

Pub. No.:    WO/2017/018885    International Application No.:    PCT/NO2016/050058
Publication Date: Fri Feb 03 00:59:59 CET 2017 International Filing Date: Fri Apr 01 01:59:59 CEST 2016
IPC: E21B 47/12
H04B 10/25
Applicants: BERGEN TECHNOLOGY CENTER AS
Inventors: HELLEVANG, Jon Oddvar
THOMAS, Peter James
LIE, Terje Lenart
FRANTZEN, Dag-Håkon
ANDERSEN, Gunnar
Title: A WELLBORE FIBRE OPTICAL COMMUNICATION SYSTEM
Abstract:
Wellbore fibre optical communication system (100) comprising; - a remote device (410) and a local device (210) said local device (210) comprising a light source (211), and said remote device (410) comprising - an optical modulator (412), and - a polarization control means (418) comprising - an polarization beam splitter (411) arranged for optical interconnection with said light source (211) via an optical fibre and configured for splitting incoming light from said light source (211) into first and second light signals with respective first and second orthogonal polarizations (P1, P2), and a polarization rotation element (413) configured for rotating said second light signal, to said first polarization (P1), wherein said polarization control means (418) is further configured for providing both said un-rotated first light signal and said rotated second light signal as input light signals to said optical modulator (412).