Optical Fiber Data Storage Using Core-Guided Readback
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Solution Overview
Problem
Existing optical storage media, particularly 5D wafer-based formats, face limitations in data storage density due to z-spacing constraints, write and readback speed, and focusing complexities, especially when reading and writing on multiple layers.
Innovation Solution
Utilizing optical fibers as a data storage medium, incorporating 4D data storage with phase and retardance dimensions, allowing for increased data density by using the fiber core as a readback channel and surface recording, and employing methods like multi-pulsed polarized femtosecond laser pulses for data encoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If 5D wafer-based optical storage is used, then data storage capacity can be achieved, but z-spacing constraints limit data storage density
Solution Approach 1:
The patent transitions from 5D wafer-based storage to 4D fiber-based storage, fundamentally changing the dimensional approach. By using optical fibers instead of wafers, the system eliminates z-spacing constraints through a different geometric configuration where data is stored along the length of the fiber rather than in stacked layers with fixed spacing requirements.
Solution Approach 2:
The invention changes the physical parameters of the storage medium from wafer-based 5D to fiber-based 4D. This parameter change includes transitioning from three spatial dimensions plus phase and retardance in wafers to two spatial dimensions plus phase and retardance in fibers, fundamentally altering how data is organized and accessed while increasing storage density.
2Productivity
If traditional optical storage methods are used, then data can be stored, but write and readback speeds are limited
Solution Approach 1:
The patent replaces the mechanical focusing and positioning systems required in traditional optical storage with a fiber-based system where light is guided through the fiber core. This substitution eliminates the need for complex mechanical adjustments during read/write operations, significantly improving access speeds.
Solution Approach 2:
The optical fiber serves multiple functions simultaneously: it acts as both the storage medium and the readback channel. The fiber core guides light for reading data while the surface stores the data, eliminating the need for separate read/write mechanisms and improving overall productivity.
3Quantity of substance
If multi-layer optical storage is implemented, then storage capacity increases, but focusing complexities increase
Solution Approach 1:
The patent extracts the focusing complexity from the storage system by using fiber-based storage where light is guided through the fiber core rather than requiring complex focusing mechanisms to access multiple layers. The fiber structure inherently guides light along its length, eliminating the need for complex focusing systems required in multi-layer wafer-based storage.
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
Enhances data storage density and capacity, improves read/write speeds, and addresses focusing challenges by utilizing the fiber's surface area efficiently, enabling higher volumetric data storage without the limitations of traditional wafer-based systems.
Implementation Method 1
a core of the optical fiber can then be used as part of a readback channel
Implementation Method 2
directing light through at least a portion of the optical fiber, the light producing an observable light dispersion pattern based on the light-affecting data stored on the optical fiber
Data Source
AI summary
Reading data stored on an optical fiber medium includes receiving an optical fiber having data stored thereon in a light-affecting format, guiding the optical fiber through a readback guide system causing a length of the optical fiber to align with an axis, directing light through at least a portion of the optical fiber, the light producing an observable light dispersion pattern based on the light-affecting data stored on the optical fiber, observing the light dispersion pattern as a manner of reading the stored data of the optical fiber, determining the stored data based on the observing the light dispersion pattern, and outputting the determined stored data to a host.