In-Line Optical Amplifier Assembly for Distributed Sensing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Distributed sensing systems face limitations in range due to signal attenuation along optical fibers, particularly in downhole applications where high attenuation and non-uniform backscatter signals hinder effective monitoring and measurement.
Innovation Solution
An in-line optical amplifier assembly is introduced to enhance the signal-to-noise ratio by amplifying light signals in distributed sensing systems, compatible with both single-mode and multi-mode fibers, allowing for extended range and compensation for attenuation, lossy splices, and non-uniform backscatter signals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If optical signal is transmitted through long optical fiber in downhole environment, then sensing coverage is extended, but signal attenuation increases and signal-to-noise ratio deteriorates
Solution Approach 1:
The patent divides the sensing system into multiple segments by introducing intermediate amplifier units along the optical fiber path. Each amplifier segment restores signal strength locally, allowing the total sensing range to exceed what a single continuous transmission could achieve without excessive attenuation.
Solution Approach 2:
Optical amplifiers are introduced as intermediary devices between the interrogation device and the distal sensing regions. These amplifiers act as mediators that receive attenuated signals, amplify them, and retransmit them, thereby extending the effective sensing range without direct degradation from the source.
2Loss of energy
If optical amplifier is added to extend sensing range, then signal-to-noise ratio is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into integrated amplifier assemblies that include the optical amplifier, circulator, and filter in a single deployable unit. This merging reduces the overall system complexity compared to having separate components for each function along the fiber path.
Solution Approach 2:
The amplifier assembly is designed to be compatible with both single-mode and multi-mode fibers, making it a universal solution that can handle different fiber types and sensing configurations. This multi-functionality reduces the need for specialized components for different scenarios.
3Loss of energy
If single-mode fiber is used for long-distance transmission, then signal attenuation is reduced, but connection with multi-mode fiber becomes difficult
Solution Approach 1:
The optical amplifier is designed with universal input and output interfaces that can accept and transmit both single-mode and multi-mode optical signals. This allows seamless connection between dissimilar fiber types without requiring mode conversion or specialized coupling components.
Solution Approach 2:
The amplifier acts as an intermediary interface between single-mode and multi-mode fiber sections. It receives signals from one fiber type, processes them, and transmits to the other fiber type, enabling heterogeneous fiber networks to function as a unified sensing system.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution effectively extends the range of distributed sensing systems, enabling reliable monitoring and measurement in high-attenuation environments and allowing connection of dissimilar optical fiber types, thereby improving data quality and system performance.
Implementation Method 1
an optical amplifier coupled to the circulator for amplifying the optical signal
Implementation Method 2
an optical filter coupled to the optical amplifier for filtering the amplified optical signal
Data Source
AI summary
The subject technology relates to an in-line amplifier assembly for distributed sensing system. The subject technology includes deploying a distributed sensing tool into a wellbore, and logging the wellbore using the distributed sensing tool. The distributed sensing tool includes a first optical amplifier and a first optical filter coupled to a first single-mode optical fiber. The first optical amplifier is coupled to a first single-mode circulator for amplifying a single-mode optical signal, and the first optical filter is coupled to the first optical amplifier for filtering the amplified single-mode optical signal. The first single-mode circulator is coupleable to an interrogator for routing the single-mode optical signal to a second single-mode optical fiber and routing a reflective optical signal from a second single-mode optical fiber to the interrogator. The reflective optical signal may traverse a second optical amplifier and a second optical fiber between the first and second single-mode circulators.