Patent ID: 11946365
Assignee: HALLIBURTON ENERGY SERVICES, INC.
Field: Civil engineering (Other fields)
Classification: CPC E  H | IPC E  H

Claim 0:
1. A method for fiber optic sensing (FOS) comprising:
transmitting one or more light pulses from an interrogator that is optically connected to a proximal wavelength division multiplexer (WDM), wherein the proximal WDM is disposed in a WDM compartment that is separate and apart from the interrogator;
multiplexing the one or more light pulses from the interrogator with the proximal WDM into an upgoing transmission fiber and a down-going transmission fiber;
passing the one or more light pulses from the proximal WDM through a proximal circulator disposed between the proximal WDM and a distal WDM;
receiving the one or more light pulses with the distal WDM that is optically connected to the upgoing transmission fiber and the down-going transmission fiber;
multiplexing the one or more light pulses with the distal WDM;
sending the one or more light pulses form the distal WDM to at least one of one or more downhole sensing fibers; and
receiving backscatter light from at least one of the one or more downhole sensing fibers at the distal WDM.