CN111696588A - Optical storage method and system based on fused quartz fluorescent signal - Google Patents
Optical storage method and system based on fused quartz fluorescent signal Download PDFInfo
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- CN111696588A CN111696588A CN202010385358.6A CN202010385358A CN111696588A CN 111696588 A CN111696588 A CN 111696588A CN 202010385358 A CN202010385358 A CN 202010385358A CN 111696588 A CN111696588 A CN 111696588A
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1362—Mirrors
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/1372—Lenses
- G11B7/1374—Objective lenses
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- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
- G11B7/12—Heads, e.g. forming of the optical beam spot or modulation of the optical beam
- G11B7/135—Means for guiding the beam from the source to the record carrier or from the record carrier to the detector
- G11B7/139—Numerical aperture control means
Abstract
The invention discloses an optical storage method and system based on fused quartz fluorescent signals, which comprises the following steps: s1, dividing the data to be stored into two parts; s2, focusing the first light beam to a processing area of the fused quartz, obtaining a hole with a corresponding size in the fused quartz by controlling the light intensity and action time of the first light beam, realizing the writing of the first part of data, and generating a fluorescence signal in the processing area; and S3, focusing the second light beam on the same processing area of the fused quartz, regulating and controlling the intensity of the fluorescent signal, and writing the second part of data so as to finish the storage of the data. The optical scattering signal and the fluorescence signal of the processing structure are adopted to respectively store data, the storage dimension of optical storage is expanded, more data can be stored on the fused quartz with the same size, the storage capacity is greatly improved, and the storage density is higher.
Description
Technical Field
The invention belongs to the field of optical storage, and particularly relates to an optical storage method and system based on fused quartz fluorescent signals.
Background
In recent years, with the rapid development of information technologies such as the internet and the internet of things, the amount of data generated in human production and life has also increased explosively. For enterprises, data centers and other organizations, how to effectively store the mass data is an important challenge. The current mainstream storage technology often has certain disadvantages when facing new requirements. For example, a common hard disk (HDD, SSD, etc.) consumes a large amount of power during use, and the service life of the device is not long, and data needs to be transcribed every 3 to 5 years, which is not suitable for long-term storage of data. Storage media such as optical disks and magnetic tapes are limited in materials, have a service life of as long as ten to twenty years, and are weak against fire and other emergency situations. Therefore, research and development of new optical storage technologies are receiving more and more attention from researchers and enterprises in recent years. Compared with electric storage and magnetic storage, the optical storage technology generally has the advantages of long service life, high storage density, environmental protection and energy conservation. With the development and popularization of the femtosecond laser technology, people can store information in the transparent material, and a multidimensional optical storage technology is developed. Unlike traditional optical disc technology, femtosecond laser can record data in tens to hundreds of data layers inside the material by utilizing the principle of multiphoton absorption, thereby greatly improving the storage capacity. Fused quartz is a potential optical storage material, has stable physical and chemical properties, and can well meet the requirements of large capacity, long service life and the like of optical storage. Therefore, the research on the optical storage method based on the fused quartz fluorescent signal is of great significance.
Japanese hitachi company in 2014 has developed a three-dimensional storage technology for fused silica media, which records data by writing tiny holes in fused silica, and has a low storage density. However, with the development of society, people have an increasing demand for storage capacity, and the adoption of a data storage technology with low storage density requires more storage media, occupies a large amount of space, and the storage capacity is improved by increasing the volume of a storage device, which is more and more not seen.
Disclosure of Invention
In view of the above drawbacks and needs of the prior art, the present invention provides a method and system for optical storage based on fused silica fluorescent signal, so as to solve the technical problem of low storage density in the prior art.
In order to achieve the above object, the present invention provides an optical storage method based on fused silica fluorescent signal, comprising the following steps:
s1, dividing the data to be stored into two parts;
s2, focusing the first light beam to a processing area of the fused quartz, obtaining a hole with a corresponding size in the fused quartz by controlling the light intensity and action time of the first light beam, realizing the writing of the first part of data, and generating a fluorescence signal in the processing area;
and S3, focusing the second light beam on the same processing area of the fused quartz, regulating and controlling the intensity of the fluorescent signal, and writing the second part of data so as to finish the storage of the data.
Further preferably, the first beam is a femtosecond laser and the second beam is a nanosecond laser or a continuous laser.
Further preferably, the size of the hole is measured by using an optical microscope, and the partial data written in the step S2 is read.
Further preferably, based on the heating effect of the second light beam on the fused quartz processing area, the intensity of the fluorescent signal is regulated and controlled in multiple stages by controlling the light intensity and action time of the second light beam, so that the writing of the second part of data is realized; wherein the second beam generates a temperature below the melting point of the fused silica.
Further preferably, the data written in step S3 is read by using a fluorescence microscope.
The invention also provides an optical storage system based on fused silica fluorescent signals, which comprises: the device comprises a first light emitter, a first reflector, a second light emitter, a second reflector, an objective lens and fused quartz;
the first light emitter is used for generating a first light beam and controlling the light intensity of the first light beam;
the first reflector is used for reflecting the first light beam to the second reflector;
the second reflector is used for transmitting the first light beam to the objective lens;
the objective lens is used for focusing the first light beam to a processing area of the fused quartz;
the fused quartz is used for obtaining holes with corresponding sizes in the fused quartz based on different light intensities and action times of the first light beam, writing in the first part of data is achieved, and a fluorescence signal is generated in a processing area;
the second light emitter is used for generating a second light beam;
the second reflector is used for reflecting the second light beam to the objective lens;
the objective lens is also used for focusing the second light beam on the same processing area of the fused quartz;
the fused quartz is also used for regulating and controlling the intensity of the fluorescent signal based on the second light beam to realize the writing of the second part of data so as to finish the storage of the data;
wherein the two portions of data are written separately and the first and second beams do not simultaneously process the fused silica.
Further preferably, the first beam is a femtosecond laser and the second beam is a nanosecond laser or a continuous laser.
Further preferably, based on the heating effect of the second light beam on the fused quartz processing area, the intensity of the fluorescent signal is regulated and controlled in multiple stages by controlling the light intensity and action time of the second light beam, so that the writing of the second part of data is realized; wherein the second beam generates a temperature below the melting point of the fused silica.
Generally, by the above technical solution conceived by the present invention, the following beneficial effects can be obtained:
1. the invention provides an optical storage method based on fused silica fluorescent signals, which adopts a first light beam to realize the storage of a first part of data, and further adopts a second light beam to regulate and control the intensity of the fluorescent signals in the same processing area of the fused silica after generating the fluorescent signals, so as to realize the writing of a second part of data.
2. The optical storage method based on the fused quartz fluorescent signal provided by the invention adopts the optical scattering signal and the fluorescent signal of the processing structure to respectively store data, thereby expanding the storage dimension of optical storage.
3. The invention provides an optical storage system based on fused quartz fluorescent signals, which is simple in structure, divides data to be stored into two parts, regulates and controls the intensity of the fluorescent signals generated at a processing area based on a second light beam after writing the first part of data in the processing area of the fused quartz, realizes the writing of the second part of data, and can realize the storage of larger capacity in fused quartz with smaller volume.
Drawings
FIG. 1 is a flowchart of an optical storage method based on fused silica fluorescent signals according to embodiment 1 of the present invention;
fig. 2 is a structural diagram of an optical storage system based on a fused silica fluorescent signal according to embodiment 2 of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.
Examples 1,
An optical storage method based on fused silica fluorescent signals, as shown in fig. 1, comprises the following steps:
s1, dividing the data to be stored into two parts;
s2, focusing the first light beam to a processing area of the fused quartz, obtaining a hole with a corresponding size in the fused quartz by controlling the light intensity and action time of the first light beam, realizing the writing of the first part of data, and generating a fluorescence signal in the processing area;
specifically, in this embodiment, the first beam is a femtosecond laser with a wavelength λ1. Based on the scattering of visible light by the holes, the reading of the data can be achieved by imaging the holes with a common optical microscope. The size of the hole is positively correlated with the intensity and action time of the laser pulse, and the larger the intensity is, the longer the action time is, and the larger the hole is. Further, the first light beam can destroy silicon-oxygen bonds of the fused silica while generating holes in the fused silica, and leave defects in the fused silica, and the defects can generate respective fluorescence signals under the excitation of light with proper wavelength. In this embodiment, a fluorescence microscope is used to observe the processing region of the fused quartz, and the defects inside the fused quartz generate respective fluorescence signals under the excitation of a fluorescence microscope light source (with a wavelength between 200nm and 500 nm).
And S3, focusing the second light beam on the same processing area of the fused quartz, regulating and controlling the intensity of the fluorescent signal, and writing the second part of data so as to finish the storage of the data.
Specifically, in this embodiment, the second light beam is nanosecond laser or continuous laser with a wavelength λ2. And selecting proper laser parameters according to the data to be stored, so that the intensity of the fluorescence signal can be regulated to a corresponding value, and the writing of the second part of data is realized. Specifically, according to the data stored in need, the appropriate laser intensity and action time are selected, the material can be locally heated, the number of defects in the material can be reduced according to the difference of heating temperature and time, the intensity of a fluorescent signal is reduced, and further the fluorescent signal is regulated to a preset value, so that the writing of another part of data is realized. In this embodiment, the second light beam is a nanosecond laser or a continuous laser, and the heating effect of the long-pulse-width laser beam on the fused quartz processing region can reunite broken silicon-oxygen bonds, so that the intensity of the fluorescent signal is regulated in multiple stages by controlling the light intensity and the action time of the second light beam, and the writing of the second part of data is realized; and the data can be quantitatively read by a fluorescence microscope and other equipment. Further, the heating temperature is far lower than the melting point of the fused silicaAnd the holes in the fused quartz cannot be damaged, so that two parts of data can be stored in a processing area of the fused quartz at the same time, and the storage capacity is greatly improved by improving the storage dimension.
Examples 2,
An optical storage system based on fused silica fluorescent signals, as shown in fig. 2, comprising: the device comprises a first light emitter, a first reflector, a second light emitter, a second reflector, an objective lens and fused quartz;
the first light emitter is used for generating a first light beam and controlling the light intensity of the first light beam; specifically, in this embodiment. The first beam is femtosecond laser with wavelength of λ1。
The first reflector is used for reflecting the first light beam to the second reflector;
the second reflector is used for transmitting the first light beam to the objective lens;
the objective lens is used for focusing the first light beam to a processing area of the fused quartz;
the fused quartz is used for obtaining holes with corresponding sizes in the fused quartz based on different light intensities and action times of the first light beam, writing in the first part of data is achieved, and a fluorescence signal is generated in a processing area;
the second light emitter is used for generating a second light beam; specifically, in this embodiment. The second light beam is nanosecond laser or continuous laser with wavelength of lambda2；
The second reflector is used for reflecting the second light beam to the objective lens;
the objective lens is also used for focusing the second light beam on the same processing area of the fused quartz;
the fused quartz is also used for regulating and controlling the intensity of the fluorescent signal based on the second light beam to realize the writing of the second part of data so as to finish the storage of the data; specifically, in this embodiment, based on the heating effect of the second light beam on the fused silica processing area, the intensity of the fluorescent signal is controlled in multiple stages by controlling the light intensity and the action time of the second light beam, so as to write in the second part of data; wherein the second beam generates a temperature below the melting point of the fused silica.
Wherein the two portions of data are written separately and the first and second beams do not simultaneously process the fused silica.
It will be understood by those skilled in the art that the foregoing is only a preferred embodiment of the present invention, and is not intended to limit the invention, and that any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (8)
1. An optical storage method based on fused silica fluorescent signals is characterized by comprising the following steps:
s1, dividing the data to be stored into two parts;
s2, focusing the first light beam to a processing area of the fused quartz, obtaining a hole with a corresponding size in the fused quartz by controlling the light intensity and action time of the first light beam, realizing the writing of the first part of data, and generating a fluorescence signal in the processing area;
and S3, focusing the second light beam on the same processing area of the fused quartz, regulating and controlling the intensity of the fluorescent signal, and writing the second part of data so as to finish the storage of the data.
2. The fused silica fluorescent signal-based optical storage method of claim 1, wherein the first light beam is a femtosecond laser and the second light beam is a nanosecond laser or a continuous laser.
3. The fused silica fluorescent signal-based optical storage method according to claim 1, wherein the size of the hole is measured by using an optical microscope, and the partial data written in the step S2 is read.
4. The optical storage method based on the fused silica fluorescent signal as claimed in claim 1, wherein based on the heating effect of the second light beam on the fused silica processing area, the writing of the second part of data is realized by controlling the light intensity and the acting time of the second light beam to perform multi-stage regulation and control on the intensity of the fluorescent signal; wherein the second beam generates a temperature below the melting point of the fused silica.
5. The fused silica fluorescent signal-based optical storage method according to claim 1, wherein the writing in step S3 is read by using a fluorescent microscope.
6. An optical storage system based on fused silica fluorescent signals, comprising: the device comprises a first light emitter, a first reflector, a second light emitter, a second reflector, an objective lens and fused quartz;
the first light emitter is used for generating a first light beam and controlling the light intensity of the first light beam;
the first reflector is used for reflecting the first light beam to the second reflector;
the second reflector is used for transmitting the first light beam to the objective lens;
the objective lens is used for focusing the first light beam to the processing area of the fused quartz;
the fused quartz is used for obtaining holes with corresponding sizes in the fused quartz based on different light intensities and action times of the first light beam, writing in of first part of data is achieved, and a fluorescence signal is generated in a processing area;
the second light emitter is used for generating a second light beam;
the second reflector is used for reflecting the second light beam to the objective lens;
the objective lens is also used for focusing a second light beam on the same processing area of the fused quartz;
the fused quartz is also used for regulating and controlling the intensity of the fluorescent signal based on the second light beam to realize the writing of the second part of data so as to finish the storage of the data;
wherein the two portions of data are written separately and the first and second beams do not simultaneously process the fused silica.
7. The fused silica fluorescent signal-based optical storage system of claim 6, wherein the first beam of light is a femtosecond laser and the second beam of light is a nanosecond laser or a continuous laser.
8. The fused silica fluorescent signal-based optical storage system of claim 6, wherein writing of the second portion of data is achieved by controlling the light intensity and action time of the second light beam in multiple stages based on the heating effect of the second light beam on the fused silica processing region; wherein the second beam generates a temperature below the melting point of the fused silica.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114267380A (en) * | 2021-12-24 | 2022-04-01 | 华中科技大学 | Multi-dimensional optical storage method using polyacrylonitrile as optical storage medium |
| CN114621395A (en) * | 2020-12-11 | 2022-06-14 | 中国科学院上海光学精密机械研究所 | Fluorescent polymer material for single-beam super-resolution optical storage and optical storage method thereof |
| CN114621395B (en) * | 2020-12-11 | 2024-05-17 | 中国科学院上海光学精密机械研究所 | Fluorescent polymer material for single-beam super-resolution optical storage and optical storage method thereof |
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