Fiber Optic Loopback Assembly for Intrusion Monitoring

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Solution Overview

Problem

Existing optical cable systems for secure networks, such as Protected Distribution Systems, face challenges with bulky and complex intrusion monitoring systems that require mechanical connections, leading to attenuation losses and assembly errors, making them unsuitable for efficient deployment in office or data center environments.

Innovation Solution

A fiber optic assembly with a furcation integrated into the optical cable, where a loopback channel is formed within the furcation, eliminating the need for connectors and adapters, and reducing attenuation by using splices instead of connectors, allowing for a secure, efficient, and space-saving intrusion monitoring system.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If mechanical connections with connectors and adapters are used to form loopback channels, then the intrusion monitoring system can be implemented, but the system becomes bulky and complex with attenuation losses

Engineering Contradiction:

Improveintrusion monitoring capabilityVSAvoidconnection scheme complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the loopback channel formation into a single integrated optical assembly where multiple optical fibers are bundled together and permanently connected through splices. This eliminates the need for separate connectors, adapters, and bridge fibers, reducing the number of components from multiple discrete mechanical connections to one integrated unit with built-in loopback channels.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The loopback channels are pre-formed and permanently spliced during manufacturing before deployment. The optical fibers are routed through the assembly, spliced to create loopback paths, and sealed in advance, eliminating the need for complex field assembly and connection during installation.

Inventive Principle:

Principle #10Preliminary action

2Reliability

If mechanical connections with connectors and adapters are used to form loopback channels, then the intrusion monitoring system can be implemented, but attenuation losses occur in the loopback signals

Engineering Contradiction:

Improveintrusion monitoring capabilityVSAvoidsignal attenuation

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The patent replaces mechanical connector-based connections with permanent optical splices. Instead of using mechanical interfaces that cause insertion loss and reflection, the optical fibers are fusion-spliced or mechanically spliced in a permanent fashion, eliminating the repetitive mechanical connections that cause signal attenuation.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If mechanical connections with connectors and adapters are used to form loopback channels, then the intrusion monitoring system can be implemented, but assembly errors increase in complex networks

Engineering Contradiction:

Improveintrusion monitoring capabilityVSAvoidassembly accuracy

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

4Reliability

If exposed hardened conduits are used for cable protection, then security and tampering prevention are improved, but the system becomes expensive and unsightly

Engineering Contradiction:

Improvesecurity and tampering preventionVSAvoidconduit system complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The optical assembly itself provides security features through integrated tamper-indicating elements and inherent physical protection. The compact, self-contained design with sealed construction and integrated loopback channels eliminates the need for separate exposed hardened conduits, as the assembly unit itself becomes the secure element.

Inventive Principle:

Principle #25Self-service

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 provides a secure, efficient, and cost-effective intrusion monitoring system with reduced attenuation and simplified assembly, enabling faster installation and improved system performance in complex networks.

Implementation Method 1

an optical cable (112) supporting a plurality of optical fibers (114)

Methodology Applied

Scientific EffectOptical fiber transmission: Optical Fibre

Implementation Method 2

a loopback channel (124) that enters the furcation (116), loops around within the furcation, and then returns to the optical cable (112) such that optical transmissions passing along the loopback channel (124) pass twice through the optical cable (112) in opposing directions

Methodology Applied

Scientific EffectOptical waveguide: Waveguide (optics)

Data Source

PatentUS9091835B2Fiber optic assembly with loopback

Publication Date: 2015.07.28 CORNING OPTICAL COMMUNICATIONS LLC

AI summary

A fiber optic assembly includes an optical cable supporting a plurality of optical fibers and a furcation integrated with the optical cable. The furcation separates optical fibers of the plurality into a first set and a second set. The first set includes a loopback channel that enters the furcation, loops around within the furcation, and then returns to the optical cable such that optical transmissions passing along the loopback channel pass twice through the optical cable in opposing directions. The second set passes through the furcation without looping back into the optical cable.