Integrated Optical Component for Compact Fiber Amplifier

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Solution Overview

Problem

Existing fiber amplifiers face challenges in size reduction, high manufacturing costs, complex production processes, and reliability due to the use of discrete components and numerous fiber fusion splices, which hinder the optimization of output power and noise coefficient.

Innovation Solution

The integration of multiple optical components into a free space integrated optical component, which includes multiple optical input/output ports connected to a pump laser or gain medium, reduces the number of components and fiber fusion splices, enabling a more compact design and lower costs through reduced encapsulating parts and fiber collimators.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If discrete optical components are used to construct fiber amplifier, then the amplifier can be assembled with existing components, but the size of the fiber amplifier becomes large and the number of components increases

Engineering Contradiction:
Improveease of manufactureVSAvoidsize of fiber amplifier
Core Design Contradiction:
Ease of manufactureVSVolume of moving object

Solution Approach 1:

Multiple discrete optical components (optical isolator, optical circulator, optical splitter, fiber collimator, gain medium) are merged into a single integrated optical component. The patent describes integrating these components into one unit with multiple optical input/output ports, eliminating the need for separate discrete components and their associated packaging, thereby significantly reducing the overall size of the fiber amplifier while maintaining the same functional capabilities.

Inventive Principle:
Principle #5Merging (Combining)

2Adaptability or versatility

If multiple discrete components and fiber fusion splices are used, then the amplifier can be constructed with standard components, but the manufacturing cost increases and the production process becomes complex

Engineering Contradiction:
ImproveadaptabilityVSAvoidproduction process complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent integrates multiple optical components into a single unit, which simplifies the production process by reducing the number of assembly steps and fiber fusion splices required. The integrated component can be manufactured as a single unit or pre-assembled module, eliminating the need for complex on-site assembly of multiple discrete components while maintaining adaptability through configurable optical ports and interfaces.

Inventive Principle:
Principle #5Merging (Combining)

3Ease of manufacture

If multiple fiber fusion splices are used to connect discrete components, then the amplifier can be assembled, but the reliability decreases due to increased connection points

Engineering Contradiction:
Improveease of assemblyVSAvoidreliability
Core Design Contradiction:
Ease of manufactureVSReliability

Solution Approach 1:

By merging multiple optical components into a single integrated unit, the patent eliminates the need for multiple fiber fusion splices between discrete components. The integrated optical component contains all necessary optical paths and connections internally, reducing the number of external connection points and thereby improving system reliability by minimizing potential failure points.

Inventive Principle:
Principle #5Merging (Combining)

4Adaptability or versatility

If discrete components with encapsulating parts and fiber collimators are used, then the amplifier can be constructed with standard components, but the material cost and manufacturing cost increase

Engineering Contradiction:
ImproveadaptabilityVSAvoidmanufacturing cost
Core Design Contradiction:
Adaptability or versatilityVSEase of manufacture

Solution Approach 1:

The integration of multiple optical components into a single unit eliminates the need for separate encapsulating parts and fiber collimators for each discrete component. The integrated design shares common packaging and mounting structures, reducing material costs and manufacturing expenses while maintaining the same optical functionality and adaptability through standardized optical interfaces.

Inventive Principle:
Principle #5Merging (Combining)

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

This approach results in a more compact fiber amplifier with lower material and manufacturing costs, improved reliability, increased output power, and reduced noise coefficient by minimizing the number of components and fiber fusion splices.

Implementation Method 1

The integration of multiple optical components into a free space integrated optical component, which includes multiple optical input/output ports connected to a pump laser or gain medium

Methodology Applied
Scientific EffectOptical integration:

Implementation Method 2

a fiber amplifier at the transmitting end, which amplifies the power of the signal light

Methodology Applied
Scientific EffectOptical amplification:

Implementation Method 3

erbium doped fiber amplifier, praseodymium doped fiber amplifier, thulium doped fiber amplifier

Methodology Applied
Scientific EffectStimulated emission:

Implementation Method 4

at least a pump laser, at least a gain medium

Methodology Applied
Scientific EffectLaser emission: Laser

Implementation Method 5

an optical isolator, an optical wavelength multiplexer

Methodology Applied
Scientific EffectOptical isolation:

Implementation Method 6

an optical circulator, an optical splitter

Methodology Applied
Scientific EffectOptical circulation:

Implementation Method 7

an optical circulator, an optical splitter

Methodology Applied
Scientific EffectOptical splitting:

Implementation Method 8

reduced encapsulating parts and fiber collimators

Methodology Applied
Scientific EffectCollimation:

Data Source

PatentUS8098425B2Fiber communication system, fiber amplifier, and method for fabricating fiber amplifier
Publication Date: 2012.01.17 HUAWEI TECH CO LTD
  • US8098425B2 patent drawing
  • US8098425B2 patent drawing
  • US8098425B2 patent drawing

AI summary

The present invention discloses a fiber amplifier, a fabricating method thereof, and a fiber communication system. The fiber amplifier includes at least a pump laser, at least a gain medium and at least an integrated optical component. The integrated optical component includes multiple optical input/output ports, and the optical input/output ports are connected to the pump laser or gain medium directly or indirectly. The present invention may better address problems of unstable performance and difficulty in reducing the size of components in the prior art where fiber amplifiers are formed by a number of discrete components with many fiber fusion splices. In addition, the present invention may reduce the production complexity and costs of fiber amplifiers, and improve the productivity of fiber amplifiers.