Hydrogen-Loaded Microstructured Optical Fiber for Longer High-Power Life
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Optical fibers used for guiding high powers suffer from degradation over time, leading to increased absorption, which is critical for commercial applications requiring long lifetime and high reliability, especially when exposed to pulsed light with high peak power.
Innovation Solution
Loading the optical fiber core and cladding with hydrogen or deuterium under specific conditions such as raised temperature, pressure, and subsequent irradiation to enhance binding and reduce degradation, thereby extending the fiber's lifetime and reducing higher order mode stripping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If optical fiber is used for guiding high power, then power transmission capability is improved, but fiber lifetime deteriorates due to degradation and increased absorption
Solution Approach 1:
The patent applies preliminary action by loading the optical fiber with hydrogen or deuterium before high-power operation. This pre-loading saturates the fiber's absorption sites, preventing subsequent degradation when exposed to high optical powers. The loading process creates a stable chemical state that resists further absorption changes during operation, thereby extending fiber lifetime while maintaining high power transmission capability.
Solution Approach 2:
The patent changes the chemical composition parameter of the optical fiber by introducing hydrogen or deuterium atoms into the glass matrix. This parameter change modifies the fiber's optical properties, specifically reducing its susceptibility to power-induced degradation. The altered chemical state provides enhanced stability against absorption increases, allowing the fiber to maintain performance under high power conditions for extended periods.
2Power
If optical fiber is exposed to pulsed light with high peak power, then non-linear effects are enhanced, but fiber degradation accelerates
Solution Approach 1:
The patent applies preliminary action by pre-saturating the fiber with hydrogen or deuterium before exposing it to high peak power pulsed light. This pre-loading creates a chemical buffer that absorbs the stress of high peak power events, preventing the formation of degradation-inducing defects. The fiber maintains its structural integrity and optical properties even under repeated high peak power pulsing, ensuring reliable operation.
3Duration of action of stationary object
If hydrogen or deuterium is loaded into the fiber, then fiber lifetime is extended, but manufacturing complexity increases
Solution Approach 1:
The patent changes the chemical composition parameter by loading hydrogen or deuterium into the fiber matrix. This parameter modification extends fiber lifetime by stabilizing the optical properties against degradation. The loading process, while adding a manufacturing step, uses established techniques such as thermal diffusion or chemical vapor deposition, integrating relatively smoothly into existing fiber production workflows.
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 method significantly extends the operational lifetime of optical fibers by reducing degradation and maintaining spectral stability, even under high power conditions, with the fiber's lifetime increasing by more than 50% and spectral stability improved by binding hydrogen or deuterium, which helps in suppressing higher order mode coupling.
Implementation Method 1
loading conditions suitable to allow hydrogen and/or deuterium to bind chemically to said material(s)
Implementation Method 2
loading said core material and optionally said cladding material with hydrogen and/or deuterium under loading conditions suitable to allow hydrogen and/or deuterium to bind chemically to said material(s)
Implementation Method 3
said loading condition comprises at least one of a) a raised temperature T
Implementation Method 4
b) a raised pressure P
Implementation Method 5
c) irradiation and/or d) subsequent irradiation
Data Source
AI summary
A method of making a microstructured optical fiber including loading the core and cladding materials of the fiber with hydrogen and deuterium at a loading temperature; annealing the fiber at a selected temperature Tanneal; pumping the fiber with radiation; and reducing the temperature of the fiber and storing the fiber at the reduced temperature before the step of pumping the fiber; and wherein the method allows the hydrogen and the deuterium to become bound to the core material and the cladding material.