Preparation method and demodulation method of optical fiber data memory

Abstract

The invention provides a preparation method of an optical fiber data memory. The method comprises the following steps: S1, processing data information needing to be stored, and converting the data information into data with a uniform number system; converting into a spatial distribution rule of a fiber grating array along the axial direction of a fiber according to a preset rule; and S2, according to the spatial distribution rule of the fiber grating array obtained in the step S1, writing the fiber grating array into the fiber core by using femtosecond laser, and writing and storing data of a uniform number system into the fiber grating array. In addition, the invention also provides a demodulation method of an optical fiber data memory. According to the invention, the flexibility and accuracy of femtosecond laser processing are utilized, and preparation parameters can be flexibly changed through data preprocessing; on the premise that the original mechanical strength of an optical fiber is not damaged, automatic writing of mass data can be accurately realized; a data storage device prepared by the method is suitable for long-term storage in working environments such as a strong magnetic field and high temperature.

Description

technical field [0001] The invention relates to the technical field of memory, in particular to a preparation method and demodulation method of an optical fiber data memory. Background technique [0002] Existing storage is generally magnetic storage or optical storage. [0003] Magnetic memory uses the surface magnetic medium as the carrier of information recording, and realizes the storage of binary digital information through two different remanence states or the switch state of 0 or 1 represented by the direction of remanence. [0004] Magnetic memory is currently the most commonly used memory, but it has the following disadvantages: 1. Magnetic memory usually requires more mechanical and circuit systems, such as signal recording circuits, signal replay circuits, servo mechanical systems, etc., and the size of the system is relatively large. Due to the exponential growth of data, magnetic storage requires a large amount of space to store a large amount of data; 2. Magne...

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Problems solved by technology

[0004] Magnetic memory is currently the most commonly used memory, but it has the following disadvantages: 1. Magnetic memory usually requires more mechanical and circuit systems, such as signal recording circuits, signal replay circuits, servo mechanical systems, etc., and the size of the system is relatively large. Due to the exponential growth of data, magnetic storage requires a large amount of space to store a large amount of data; 2. Magnetic storage has the problem of short life, and it is difficult for magnetic storage to meet this requirement for data that needs to be stored stably for a long time; 3. Magnetic storage usually Long-term power supply is required, which greatly increases the cost and power consumption of magnetic storage methods

[0006] This type of optical storage combined with multi-dimensional multiplexing technology has achieved high storage density, but it still has some shortcomings: 1. Traditional optical storage devices cannot be stored under strong light to prevent light from affecting the storage material and internal information. ; 2. Because high temperature has a great influence on the material of traditional optical memory, it cannot be stored and worked in a high temperature environment; 3. Because traditional optical memory is easy to wear and tear, it needs better mechanical protection during storage

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