Data read-write device and electronic equipment

Abstract

The embodiment of the application provides a data read-write device and electronic equipment, relates to the field of data storage, and can improve the performance of data read-write. The data read-write device comprises: a first laser, which is used for outputting a first light pulse according to a control signal, wherein the control signal is a signal obtained according to to-be-written data; a dispersion compensator, which is used for performing dispersion compensation on the first light pulse to output a second light pulse; and a fiber lens, which is connected with the dispersion compensator through an optical fiber and is used for focusing the second light pulse to an optical storage medium, so as to write the to-be-written data into the optical storage medium.

Description

Technical Field

[0001] This application relates to the field of data storage, and more particularly to a data read / write device and an electronic device. Background Technology

[0002] Optical storage technology has the advantages of energy saving and long lifespan. It can be used to write data to or read data from optical discs.

[0003] Currently, data writing and reading are achieved by changing the optical path of the laser through optical components (including mirrors, objective lenses, etc.). Since optical components are sensitive to external factors such as dust and humidity, optical path misalignment is prone to occur, which will affect data reading and writing and reduce data reading and writing performance. Summary of the Invention

[0004] This application provides a data reading and writing device and an electronic device that can improve the performance of data reading and writing.

[0005] To achieve the above objectives, the embodiments of this application adopt the following technical solutions:

[0006] In a first aspect, embodiments of this application provide a data read / write device, comprising: a first laser for outputting a first optical pulse according to a control signal, the control signal being a signal obtained based on data to be written; a dispersion compensator for performing dispersion compensation on the first optical pulse to output a second optical pulse; and an optical fiber lens connected to the dispersion compensator via an optical fiber for focusing the second optical pulse onto an optical storage medium to write the data to be written into the optical storage medium.

[0007] This application provides a data read / write device in which the components are fiber optic devices, and these fiber optic devices are connected via optical fiber coupling. Because fiber optic devices are insensitive to the external environment and can operate stably in harsh environments, data read / write performance can be improved through this data read / write device. Furthermore, connecting the various components via optical fibers results in high optical path integration, and the size of the data read / write device is smaller than that of traditional data read / write devices constructed using optical components.

[0008] In one possible implementation, the data reading and writing device provided in this application embodiment further includes: a second laser, an optical fiber coupler, and a detector, wherein the optical fiber coupler connects the second laser, the optical fiber lens, and the detector via optical fibers. The second laser is used to output a first continuous laser beam; the optical fiber lens is also used to receive the first continuous laser beam, focus the first continuous laser beam onto the optical storage medium, and receive a first fluorescence signal generated by the optical storage medium according to the first continuous laser beam, wherein the first fluorescence signal is used to indicate the data to be read; the detector is used to detect the light intensity of the first fluorescence signal to obtain the data to be read.

[0009] The aforementioned first continuous laser is focused onto the optical storage medium, which excites the carbon-containing clusters in the recording layer of the optical storage medium to generate a first fluorescence signal. The first fluorescence signal is reflected to the fiber optic lens and transmitted to the detector. The detector detects the light intensity of the first fluorescence signal to obtain the data to be read. Then, other modules in the optical storage system perform subsequent signal processing and decoding on the data to be read.

[0010] Alternatively, the detector described above can be a photomultiplier tube (PMT) or an avalanche photodiode (APD).

[0011] In one possible implementation, the data reading and writing device provided in this application embodiment further includes: an isolator, which is connected to the second laser and the fiber coupler respectively via optical fiber, for preventing the first fluorescence signal from being transmitted to the second laser.

[0012] During the data reading process, the first fluorescence signal collected by the fiber optic lens needs to enter the detector. If the first fluorescence signal is reflected to the second laser, it may damage the second laser. By connecting an isolator to one end of the second laser, the first fluorescence signal can be prevented from entering the second laser, thus ensuring the safe operation of the second laser.

[0013] In one possible implementation, the first laser includes a femtosecond laser or a picosecond laser. The pulse width of the pulsed laser produced by the femtosecond laser is femtosecond (10^6 Hz). -15 Picosecond lasers produce pulsed lasers with pulse widths in the picosecond range (10^6 seconds). -12 (seconds) level.

[0014] In one possible implementation, the dispersion compensator includes a chirp compensator. The chirp compensator adjusts the dispersion parameters using a prism pair or a grating pair, thereby providing inverse dispersion to compensate for the dispersion of the first light pulse and obtain a second light pulse.

[0015] Secondly, embodiments of this application provide a data read / write device, including: (second) a laser, an optical fiber coupler, an optical fiber lens, and a detector; wherein the optical fiber coupler connects the second laser, the optical fiber lens, and the detector via optical fibers. The second laser is used to output a first continuous laser beam; the optical fiber lens is used to receive the first continuous laser beam, focus the first continuous laser beam onto an optical storage medium, and receive a first fluorescence signal generated by the optical storage medium according to the first continuous laser beam, wherein the first fluorescence signal is used to indicate the data to be read; the detector is used to detect the light intensity of the first fluorescence signal to obtain the data to be read.

[0016] It should be noted that the embodiments of this application do not limit how the data stored in the optical storage medium is written.

[0017] The aforementioned first continuous laser is focused onto the optical storage medium, which excites the carbon-containing clusters in the recording layer of the optical storage medium to generate a first fluorescence signal. The first fluorescence signal is reflected to the fiber optic lens and transmitted to the detector. The detector detects the light intensity of the first fluorescence signal to obtain the data to be read. Then, other modules in the optical storage system perform subsequent signal processing and decoding on the data to be read.

[0018] Alternatively, the detector described above can be a photomultiplier tube (PMT) or an avalanche photodiode (APD).

[0019] This application provides a data read / write device in which the device is an optical fiber device, and the optical fiber device is connected by optical fiber coupling. Since the optical fiber device is not sensitive to the external environment and can work stably in harsh environments, the data read / write performance can be improved by using this data read / write device.

[0020] Furthermore, connecting the aforementioned devices via optical fibers results in high optical path integration, making the data read / write device smaller than traditional data read / write devices constructed using optical components.

[0021] In one possible implementation, the data reading and writing device provided in this application embodiment further includes: an isolator, which is connected to the second laser and the fiber coupler respectively via optical fiber, for preventing the first fluorescence signal from being transmitted to the second laser.

[0022] During the data reading process, the first fluorescence signal collected by the fiber optic lens needs to enter the detector. If the first fluorescence signal is reflected to the second laser, it may damage the second laser. By connecting an isolator to one end of the second laser, the first fluorescence signal can be prevented from entering the second laser, thus ensuring the safe operation of the second laser.

[0023] In conjunction with the first aspect and its possible implementations, and the second aspect and its possible implementations, this application provides a data reading and writing device that further includes: a bandpass filter, connected to a detector and an optical fiber coupler respectively, for receiving a first fluorescence signal and filtering the first fluorescence signal; and a detector, specifically used to detect the light intensity of the filtered first fluorescence signal to obtain the data to be read.

[0024] The bandpass filter described above has a filtering band of 600–700 nm. This bandpass filter can filter out stray light and reflected light outside the 600–700 nm wavelength band, improve the signal-to-noise ratio of the first fluorescence signal, and make the data to be read by the detector more accurate.

[0025] In conjunction with the first aspect and its possible implementations, and the second aspect and its possible implementations, this application provides a data read / write device that further includes: a piezoelectric actuator for driving a fiber optic lens to move, thereby adjusting the position of the fiber optic lens, the position of which corresponds to the position of a data recording point on the optical storage medium. By adjusting the input voltage of the piezoelectric actuator to adjust the position of the fiber optic lens, the position of the light spot focused on the optical storage medium is changed, thereby reading data from different data recording points on the optical storage medium.

[0026] The aforementioned piezoelectric actuator is a triaxial piezoelectric actuator, meaning that it can control the fiber optic lens to move in three spatial dimensions (e.g., along the x-axis, y-axis, and z-axis). Moving along the x-axis and y-axis can control the fiber optic lens to focus the second light pulse at different positions on the plane of the optical storage medium, while moving along the z-axis can control the fiber optic lens to focus the second light pulse at different layers of the recording layer of the optical storage medium, thus controlling the depth of the focused light spot within the optical storage medium and thereby reading data from different recording layers.

[0027] In conjunction with the first aspect and its possible implementations, and the second aspect and its possible implementations, the fiber optic lens includes any of the following: a GRIN fiber optic lens, a metamaterial lens, or a fiber end sphere.

[0028] GRIN fiber optic lenses possess self-focusing capabilities and excellent focusing performance due to their continuously varying refractive index. Furthermore, the planar end face of a GRIN fiber optic lens facilitates integration with other planar optical devices via fusion splicing, thereby improving the probe's mechanical strength and stability.

[0029] Furthermore, because the end of the GRIN fiber lens (the end adjacent to the optical storage medium) is very small, reaching the millimeter level, and the GRIN fiber lens is lightweight, it can support higher frequency servo feedback signals.

[0030] Combining the first aspect and its possible implementations, and the second aspect and its possible implementations, the wavelength range of the first continuous laser output by the second laser is 400–500 nanometers.

[0031] Combining the first aspect and its possible implementation methods, and the second aspect and its possible implementation methods, the wavelength of the first fluorescent signal is 600–700 nanometers.

[0032] Thirdly, embodiments of this application provide a data reading and writing device, including: a first laser, a dispersion compensator, a first fiber coupler, N optical switches, an N-channel photoelectric controller, and N fiber lenses; wherein, the first fiber coupler is connected to the N optical switches respectively via optical fibers, the N-channel photoelectric controller is connected to the N optical switches respectively, and the N optical switches are correspondingly connected to the N fiber lenses via optical fibers, where N is a positive integer greater than or equal to 2. A first laser is used to output a first optical pulse; a dispersion compensator is used to compensate for the dispersion of the first optical pulse to output a second optical pulse; a first fiber coupler is connected to the dispersion compensator via an optical fiber to split the second optical pulse into N optical pulses; an N-channel photoelectric controller is used to control the state of N optical switches according to N control signals to adjust the light intensity of the N optical pulses, wherein the N control signals are signals obtained according to N data to be written, and the N optical pulses are used to indicate the N data to be written; N fiber lenses are used to focus the N optical pulses onto the optical storage medium to write the N data to be written into the optical storage medium, wherein the N fiber lenses correspond one-to-one with the N optical pulses.

[0033] The aforementioned data read / write device can read N data items from an optical storage medium in parallel, significantly improving data reading efficiency.

[0034] In one possible implementation, the first fiber coupler is a 1×N fiber coupler, which is used as a beam splitter. When the data to be written includes N items, the first fiber coupler splits the first optical pulse into N identical optical pulses.

[0035] In one possible implementation, the data read / write device provided in this application embodiment further includes: a second laser, a second fiber coupler, N third fiber couplers, and an N-channel detector, wherein the N third fiber couplers are respectively connected to the second fiber coupler, the N fiber lenses, and the N-channel detector via optical fibers. The second laser is used to output a first continuous laser beam; the second fiber coupler, connected to the second laser beam via optical fibers, is used to split the first continuous laser beam into N continuous laser beams; the N fiber lenses are also used to receive the N continuous laser beams, focus the N continuous laser beams onto the optical storage medium, and receive N fluorescence signals generated by the optical storage medium based on the N continuous laser beams, wherein each of the N fiber lenses corresponds one-to-one with one of the N continuous laser beams, and the N fluorescence signals are respectively used to indicate N data to be read; the N-channel detector is used to detect the light intensity of the N fluorescence signals respectively to obtain the N data to be read.

[0036] Fourthly, embodiments of this application provide a data read / write device, comprising: a second laser, a second fiber coupler, N third fiber couplers, N fiber lenses, and an N-channel detector, wherein the N third fiber couplers are respectively connected to the second fiber coupler, the N fiber lenses, and the N-channel detector via optical fibers. The second laser is used to output a first continuous laser beam; the second fiber coupler, connected to the second laser beam via optical fibers, is used to split the first continuous laser beam into N continuous laser beams; the N fiber lenses are used to receive the N continuous laser beams, focus the N continuous laser beams onto an optical storage medium, and receive N fluorescence signals generated by the optical storage medium based on the N continuous laser beams, wherein each of the N fiber lenses corresponds one-to-one with one of the N continuous laser beams, and the N fluorescence signals are used to indicate N data to be read; the N-channel detector is used to detect the light intensity of the N fluorescence signals to obtain the N data to be read.

[0037] The data read / write device provided in this application embodiment can read N data items stored in an optical storage medium (transparent optical disc) in parallel, which can significantly improve the efficiency of data reading.

[0038] In conjunction with the third aspect and its possible implementations, and the fourth aspect and its possible implementations, the data reading and writing device provided in this application embodiment further includes: an isolator, which is connected to the second laser and the second fiber coupler respectively through optical fibers, for preventing N fluorescent signals from being transmitted to the second laser, thereby ensuring that the second laser is not damaged by the fluorescent signals.

[0039] In conjunction with the third aspect and its possible implementations, and the fourth aspect and its possible implementations, the data reading and writing device provided in this application further includes: N bandpass filters, each connected to an N-channel detector and N third fiber couplers via optical fibers, for receiving and filtering N fluorescence signals, wherein each of the N bandpass filters corresponds one-to-one with one of the N fluorescence signals; and an N-channel detector, specifically used to detect the light intensity of the filtered N fluorescence signals to obtain the data to be read. The N bandpass filters can respectively filter out stray light and reflected light from the N fluorescence signals, improving the signal-to-noise ratio of the N fluorescence signals and increasing the accuracy of the read data.

[0040] In conjunction with the third aspect and its possible implementations, and the fourth aspect and its possible implementations, the data reading and writing device provided in this application embodiment further includes: a piezoelectric actuator for driving N fiber optic lenses to move, so as to adjust the positions of the N fiber optic lenses, wherein the positions of the N fiber optic lenses respectively correspond to the positions of different data recording points on the optical storage medium.

[0041] It should be noted that the data read / write device in this embodiment includes a piezoelectric actuator, which can simultaneously drive N fiber optic lenses to move in the same direction. Optionally, the N fiber optic lenses can be fixed together, and the piezoelectric actuator can be fixed to one side of one of the piezoelectric actuators.

[0042] Fifthly, embodiments of this application provide an electronic device, which includes an optical storage medium and a data reading and writing device as described in any one of the first aspects and their possible implementations, or the electronic device includes a data reading and writing device as described in any one of the second aspects and their possible implementations, or the electronic device includes a data reading and writing device as described in any one of the third aspects and their possible implementations, or the electronic device includes a data reading and writing device as described in any one of the fourth aspects and their possible implementations. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the architecture of an optical storage system provided in an embodiment of this application;

[0044] Figure 2 A schematic diagram of the structure of a data read / write device provided in this application embodiment. Figure 1 ;

[0045] Figure 3 A schematic diagram of the structure of a data read / write device provided in this application embodiment. Figure 2 ;

[0046] Figure 4 A schematic diagram of the structure of a data read / write device provided in this application embodiment. Figure 3 ;

[0047] Figure 5 A schematic diagram of the structure of a data read / write device provided in this application embodiment. Figure 4 ;

[0048] Figure 6 A schematic diagram of the structure of a data read / write device provided in this application embodiment. Figure 5 ;

[0049] Figure 7 A schematic diagram of the structure of a data read / write device provided in this application embodiment. Figure 6 ;

[0050] Figure 8 A schematic diagram of the structure of a data read / write device provided in this application embodiment. Figure 7 ;

[0051] Figure 9 A schematic diagram of the structure of a data read / write device provided in this application embodiment. Figure 8 ;

[0052] Figure 10 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 9 ;

[0053] Figure 11 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 ;

[0054] Figure 12 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 one;

[0055] Figure 13 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 two;

[0056] Figure 14 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 three;

[0057] Figure 15 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 Four;

[0058] Figure 16 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 five;

[0059] Figure 17 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 six;

[0060] Figure 18 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 seven;

[0061] Figure 19 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 eight;

[0062] Figure 20 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 10 Nine;

[0063] Figure 21 Schematic diagram of the data read / write device provided in the embodiments of this application Figure 2 ten. Detailed Implementation

[0064] In this article, the term "and / or" is merely a description of the relationship between related objects, indicating that there can be three relationships. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone.

[0065] The terms "first" and "second," etc., used in the specification and claims of this application are used to distinguish different objects, not to describe a specific order of objects. For example, "first optical pulse" and "second optical pulse," etc., are used to distinguish different optical pulses, not to describe a specific order of optical pulses; similarly, "first laser" and "second laser," etc., are used to distinguish different lasers, not to describe a specific order of lasers.

[0066] In the embodiments of this application, the terms "exemplary" or "for example" are used to indicate that something is an example, illustration, or description. Any embodiment or design that is described as "exemplary" or "for example" in the embodiments of this application should not be construed as being more preferred or advantageous than other embodiments or design. Specifically, the use of the terms "exemplary" or "for example" is intended to present the relevant concepts in a specific manner.

[0067] In the description of the embodiments in this application, unless otherwise stated, "multiple" means two or more. For example, multiple processing units means two or more processing units; multiple systems means two or more systems.

[0068] To address the problems existing in the background technology, this application provides a data read / write device and an electronic device. In this data read / write device, a first laser outputs a first optical pulse based on a control signal. This first optical pulse is a signal obtained from the data to be written. A dispersion compensator then performs dispersion compensation on the first optical pulse and outputs a second optical pulse. A fiber optic lens connected to the dispersion compensator focuses the second optical pulse onto an optical storage medium to write the data to be written into the optical storage medium. The devices in this data read / write device (e.g., the dispersion compensator and the fiber optic lens) are fiber optic devices, and these devices are connected via fiber optic coupling. Because fiber optic devices are insensitive to the external environment and can operate stably in harsh environments, data read / write performance can be improved through this data read / write device.

[0069] The data read / write device provided in this application embodiment can be applied to... Figure 1 The optical storage system shown includes an optical storage medium 101, a read / write optical path module 102, a signal processing module 103, a codec 104, a main control module 105, an optical path control module 106, a servo control module 107, a servo electromechanical system 108, and a communication interface 109.

[0070] The aforementioned optical storage medium 101 can be an optical disc, including read-only optical discs and recordable optical discs. Common optical discs include CDs, DVDs, Blu-ray discs, and clear discs. In this embodiment, the optical storage medium is a clear disc. Generally, an optical disc is about 1.2 mm thick and 120 mm in diameter, and the capacity of a single disc ranges from GB to TB.

[0071] An optical disc mainly consists of a substrate, a recording layer, and a protective layer. The substrate is the carrier of all parts of the optical disc and also the physical shell of the disc. The substrate can be made of materials such as polycarbonate (PC). The recording layer is the layer on the optical disc where signals are recorded. The recording layer is composed of organic materials (or phase change materials) coated on the substrate. Data is written or read by irradiating the recording layer with a laser. The protective layer is used to protect the recording layer and prevent it from being damaged. Optionally, the material of the protective layer can be a photocurable acrylic substance.

[0072] Optical discs can have multiple recording layers. For example, Blu-ray discs have four recording layers and a capacity of up to 300GB, while clear discs can have more than 30 recording layers and a capacity of up to TB.

[0073] Optionally, in some cases, a reflective layer is also included between the recording layer and the protective layer. The reflective layer is used to reflect the laser to read the data in the optical disc. A printing layer is also included outside the protective layer, on which information such as the optical disc's identification and capacity are printed.

[0074] It should be understood that for different types of optical discs, the various layers of the disc can be made of different materials. For example, for Blu-ray discs, the recording layer is made of phase change material. For clear discs, clear discs are composed of a homogeneous material and a substrate, and layered writing is achieved by focusing at different depths. The homogeneous material can be PC, polymethyl methacrylate (PMAA), or polydimethyl siloxane (PDMS), etc.

[0075] The read / write optical path module 102 is used to write optical signals (which indicate data to be written) to the optical storage medium 101 or to read optical signals (which indicate data to be read) from the optical storage medium 101.

[0076] In this embodiment, the read / write optical path module 102 is composed of optical devices and fiber optic devices. The data read / write device provided in this embodiment is the read / write optical path module 102 in the optical storage system. A detailed description of the data read / write device will be introduced in the following embodiments.

[0077] The signal processing module 103 is used to process the optical signal (indicating the data to be read) output by the read / write optical path module 102 and remove interference signals from the optical signal.

[0078] The codec 104 is used to encode the data to be written or to decode the data to be read.

[0079] The main control module 105 is used to control and manage transactions during the writing or reading of data, and generates circuit control signals and servo control signals according to the data to be written. The circuit control signals are input to the optical path control module 106, and the servo control signals are input to the servo control module 107.

[0080] The main control module 105 includes a cache management module, an addressing management module, a data layout module, and a queue management module. The cache management module caches data to be written; the addressing management module generates the physical location of the data on the disk; the data layout module arranges the data on different partitions of the optical disc according to rules; and the queue management module manages the cache queue.

[0081] The optical path control module 106 is used to generate an optical control signal (also called a control signal) based on the circuit control signal, and input the optical control signal to the read / write optical path module 102.

[0082] The servo control module 107 is connected to the servo electromechanical system 108. The servo control module 107 outputs servo control signals to drive the motor in the servo motor system 108 to control the position of the optical head in the read / write optical path module used for reading or writing data.

[0083] The communication interface 109 is used to receive write data instructions and read data instructions, and to receive data to be written or to output data to be read.

[0084] Based on the functions of each module in the optical storage system described above, the following is a brief introduction to the processes of writing data into and reading data from the optical storage medium.

[0085] Writing data: The codec 104 receives the data to be written and the write data command through the communication interface 109, encodes the data to be written, and saves the encoded data in the buffer. Then, the data to be written is transmitted to the optical path control module 106. The optical path control module 106 adjusts the optical path according to the data to be written and the circuit control signal output by the main control module 105 to generate an optical control signal. The read / write optical path module 102 generates a laser signal according to the optical control signal and focuses the laser signal onto the optical storage medium 101 to complete the data writing. During the data writing process, the servo control module 107 and the servo motor system 108 control the motor of the servo control system 108 according to the servo control signal output by the main control module 105 to control the movement of the optical head in the read / write optical path module, so that the optical head corresponds to different positions (three-dimensional spatial positions, including up and down, left and right, and front and back) on the optical storage medium 101, thereby realizing different positions on the optical storage medium 101.

[0086] Reading data: The read data command is received through the communication interface 109. Then, the main control module 10 generates servo control signals and circuit control signals. The optical path control module 106 generates an optical control signal according to the circuit control signal. The read / write optical path module 102 generates a laser signal according to the optical control signal (it should be noted that this laser signal is different from the laser signal generated during data writing). The laser signal is focused onto the optical storage medium 101. The read / write optical path module 102 receives the fluorescence signal reflected by the optical storage medium 101 and then detects the fluorescence signal to obtain the data to be read. The data to be read is processed by the signal processing module 103 and then decoded and output by the codec 104, thereby completing the data reading.

[0087] In combination with the above optical storage systems, such as Figure 2 As shown in the figure, this application embodiment provides a data reading and writing device for data writing. The data reading and writing device includes: a first laser 201, a dispersion compensator 202, and an optical fiber lens 203. The first laser 201 is connected to the input end of the dispersion compensator 202, and the output end of the dispersion compensator 202 is connected to the optical fiber lens 203.

[0088] The first laser 201 is used to output a first optical pulse according to a control signal, which is a signal obtained based on the data to be written; the dispersion compensator 202 is used to perform dispersion compensation on the first optical pulse to output a second optical pulse; the fiber optic lens 203 is connected to the dispersion compensator 202 through an optical fiber and is used to focus the second optical pulse onto the optical storage medium to write the data to be written into the optical storage medium.

[0089] In this embodiment, the first laser 201 is a device that generates a light source in the data read / write device. When writing data, the first laser 201 is turned on. After receiving a control signal output by the optical path control module in the optical storage system, the first laser 201 generates a pulsed laser (i.e., the first optical pulse) according to the control signal. Optionally, the first laser 201 can be a femtosecond laser or a picosecond laser. Femtosecond lasers and picosecond lasers can also be collectively referred to as ultrafast lasers. The pulse width of the pulsed laser generated by the femtosecond laser is femtosecond (10^6 Hz). -15 Picosecond lasers produce pulsed lasers with pulse widths in the picosecond range (10^6 seconds). -12 (seconds) level.

[0090] Optionally, the first laser 201 may be a ytterbium-doped fiber laser, which outputs a laser with a wavelength of 1030 nanometers (nm), a repetition frequency of 40 megahertz (MHz), a pulse width of 200 femtoseconds (fs), and an output power of 5 watts (W).

[0091] In this embodiment, since the optical fiber may introduce dispersion when the optical pulse is transmitted in the optical fiber, the pulse width of the optical pulse will increase, thereby affecting the accuracy of the written data. Therefore, the first optical pulse generated by the first laser 201 is input to the dispersion compensator 202 to compensate for the dispersion introduced by the optical fiber and adjust the pulse width to the required parameters.

[0092] Optionally, the dispersion compensator 202 includes a chirp compensator, which adjusts the dispersion parameters using a prism pair or a grating pair to provide reverse dispersion for dispersion compensation of the first optical pulse, resulting in a second optical pulse. It should be understood that the chirp compensator is connected to the fiber optic lens 203 via an optical fiber. The chirp compensator includes a focusing lens, and the dispersion-compensated second optical pulse is coupled into the optical fiber through this focusing lens, thereby being transmitted to the fiber optic lens 203.

[0093] In this embodiment, the fiber optic lens 203 serves as the probe of the data read / write device, focusing the first pulse light onto the optical storage medium (optical disc). Since the first light pulse generated by the first laser 201 is an ultrashort pulse laser, the ultrashort pulse laser is focused onto the optical storage medium, causing the carbon-oxygen bonds and carbon-carbon bonds in the transparent material of the recording layer of the optical storage medium to be destroyed, thereby forming carbon-containing clusters with a fluorescent effect, thus completing the data writing.

[0094] The aforementioned fiber lens 203 can be a gradient-index (GRIN) fiber lens. The refractive index of a GRIN fiber lens varies in a gradient; specifically, the refractive index gradually decreases radially along the central axis of the GRIN fiber lens. When the second optical pulse enters the GRIN fiber lens and propagates within it, the light undergoes continuous deflection. Because the refractive index of the GRIN fiber lens changes continuously, it possesses self-focusing capabilities and exhibits good focusing performance. Furthermore, since the end face of the GRIN fiber lens is planar, it is easy to integrate it with other optical devices that have planar end faces via fusion splicing, which helps improve the mechanical strength and stability of the probe.

[0095] Furthermore, because the end of the GRIN fiber lens (the end adjacent to the optical storage medium) is very small, reaching the millimeter level, and the GRIN fiber lens is lightweight, it can support higher frequency servo feedback signals.

[0096] Optionally, the fiber optic lens 203 can also be other lenses such as metamaterial lenses or fiber optic end spheres. The appropriate fiber optic lens can be selected according to the actual application requirements, and this application embodiment does not limit the specific application.

[0097] In one implementation, such as Figure 3 As shown, the data reading and writing device provided in this application embodiment also includes a piezoelectric actuator 204. A fiber optic lens 203 is fixed on one side of the piezoelectric actuator 204. The piezoelectric actuator 204 is used to drive the fiber optic lens 203 to move, so as to adjust the position of the fiber optic lens 203. The position of the fiber optic lens 203 corresponds to the position of the data recording point on the optical storage medium.

[0098] In this embodiment, the position of the fiber optic lens 204 is adjusted by regulating the input voltage of the piezoelectric actuator 204, thereby changing the position of the light spot focused on the optical storage medium and writing data at different data recording points on the optical storage medium. It should be understood that the servo control system in this optical storage system can output servo feedback signals in real time, thereby adjusting the input voltage of the piezoelectric actuator 204 and thus adjusting the position of the fiber optic lens 203 in real time.

[0099] Combination Figure 3The piezoelectric actuator 204 is a triaxial piezoelectric actuator, meaning that the piezoelectric actuator 204 can control the fiber optic lens 203 to move in three spatial dimensions (e.g., along the x-axis, y-axis, and z-axis). Moving along the x-axis and y-axis can control the fiber optic lens 203 to focus the second light pulse at different positions on the plane of the optical storage medium, and moving along the z-axis can control the fiber optic lens 203 to focus the second light pulse at different layers of the recording layer of the optical storage medium, that is, to control the depth of the focused light spot within the optical storage medium, thereby enabling data writing at different recording layers.

[0100] Optionally, the focusing lens in the above-mentioned chirp compensator is fixed to the optical fiber with UV adhesive, and the optical fiber lens 203 is fixed to one side of the piezoelectric actuator 204 with UV adhesive.

[0101] Alternatively, the device used to drive the fiber optic lens 203 to move can also be a voice coil motor, that is, the piezoelectric actuator 204 described above can be replaced by a voice coil motor.

[0102] like Figure 4 As shown, the data reading and writing device provided in this application embodiment further includes a (second) laser 205, an optical fiber coupler 206, and a detector 207, which can be used for data reading. The optical fiber coupler 206 connects the second laser 205, the optical fiber lens 203, and the detector 207 via optical fibers. The second laser 205 outputs a first continuous laser beam; the optical fiber lens 203 receives the first continuous laser beam, focuses it onto an optical storage medium, and receives a first fluorescence signal generated by the optical storage medium based on the first continuous laser beam, wherein the first fluorescence signal indicates the data to be read; the detector 207 detects the intensity of the first fluorescence signal to obtain the data to be read.

[0103] In this embodiment, the fiber optic coupler is a connecting device between fiber optic devices. The fiber optic coupler includes two ends (which can be referred to as the first end and the second end), which are respectively connected to different devices. The specification of the fiber optic coupler is denoted as 1×N, where 1 represents the number of ports on the first end and N represents the number of ports on the second end. That is, the first end includes 1 port, and the second end includes N (N is a positive integer greater than or equal to 1) ports, which can be used to connect N devices. For example, the data read / write device includes a 1×3 fiber optic coupler, as described above. Figure 3 The fiber optic coupler 206 is a 1×3 fiber optic coupler. The first port of the fiber optic coupler 206 is connected to the fiber optic lens 203, the first port of the second port is connected to the dispersion compensator 202, the second port of the second port is connected to the second laser 205, and the third port of the second port is connected to the detector 207.

[0104] Optionally, the data read / write device provided in this application embodiment may also include two 1×2 fiber optic couplers, such as... Figure 5 As shown, the first end of fiber optic coupler 206a is connected to fiber optic lens 203, and the first port of the second end of fiber optic coupler 206a is connected to dispersion compensator 202; the first end of fiber optic coupler 206b is connected to the second port of the second end of fiber optic coupler 206a, the first port of the second end of fiber optic coupler 206b is connected to second laser 205, and the second port of the second end is connected to detector 207.

[0105] It should be noted that in practical applications, different specifications and quantities of fiber optic couplers can be selected according to specific needs, and this application embodiment does not limit them.

[0106] During the data reading process, the second laser 205 is activated to generate a first continuous laser to excite the carbon-containing clusters with fluorescence effect in the optical storage medium. Specifically, the first continuous laser is transmitted to the fiber optic lens 203 through an optical fiber. The fiber optic lens 203 focuses the first continuous laser onto the optical storage medium, thereby exciting the carbon-containing clusters in the recording layer of the optical storage medium to generate a first fluorescence signal. The first fluorescence signal is reflected to the fiber optic lens 203 and transmitted to the detector 207. The detector 207 detects the light intensity of the first fluorescence signal to obtain the data to be read. Then, other modules in the optical storage system perform subsequent signal processing and decoding on the data to be read.

[0107] The second laser 205 is a continuous light laser pulser used to generate continuous laser light. Optionally, the second laser 205 can be a continuous light semiconductor laser. The wavelength of the laser light generated by the continuous light semiconductor laser is 400-500nm and the output power is 10 milliwatts (mW). The 400-500nm continuous laser light, when focused on the optical storage medium, can generate a first fluorescence signal with a wavelength of 600-700nm.

[0108] Optionally, the detector 207 can be a photomultiplier tube (PMT) or an avalanche photodiode (APD).

[0109] Similarly, during the data reading process, the piezoelectric actuator 204 can drive the fiber optic lens 203 to move, thereby adjusting the position of the fiber optic lens 203 and reading the data recorded at different data recording points in the optical storage medium.

[0110] It is understandable that during the above data writing and data reading processes, the lasers used to generate the light source (laser signal) are two independently operating lasers. When writing data, an ultrafast laser is used to generate pulsed laser, and when reading data, a continuous light semiconductor laser is used to generate continuous laser.

[0111] Combination Figure 4 ,like Figure 6 As shown, in one implementation, the data reading and writing device provided in this application embodiment further includes an isolator 208, which is connected to the second laser 205 and the fiber coupler 206 via optical fibers, respectively. The isolator 208 is used to organize the transmission of the first fluorescence signal to the second laser.

[0112] In this embodiment of the application, during the data reading process, the first fluorescence signal collected by the fiber optic lens 203 needs to enter the detector 207. If the first fluorescence signal is reflected to the second laser 205, it may damage the second laser 205. By connecting an isolator 208 to one end of the second laser 205, the first fluorescence signal is prevented from entering the second laser 205, thus ensuring the safe operation of the second laser 205.

[0113] Combination Figure 6 ,like Figure 7 As shown, in one implementation, the data read / write device provided in this application embodiment further includes a bandpass filter 209. The bandpass filter 209 is connected to both the detector 207 and the fiber optic coupler 206. The bandpass filter 209 is used to receive a first fluorescence signal and filter the first fluorescence signal. The detector 207 is specifically used to detect the light intensity of the filtered first fluorescence signal to obtain the data to be read.

[0114] In this embodiment of the application, the bandpass filter 209 has a filtering band of 600-700nm. The bandpass filter 209 can filter out stray light and reflected light outside the 600-700nm band, improve the signal-to-noise ratio of the first fluorescence signal, and make the data to be read detected by the detector 207 more accurate.

[0115] This application provides a data read / write device. A first laser in the device outputs a first optical pulse based on a control signal. This first optical pulse is a signal obtained from the data to be written. A dispersion compensator then performs dispersion compensation on the first optical pulse and outputs a second optical pulse. A fiber optic lens connected to the dispersion compensator focuses the second optical pulse onto an optical storage medium to write the data to the optical storage medium. The devices in this data read / write device are fiber optic devices, and these devices are connected via fiber optic coupling. Because fiber optic devices are insensitive to the external environment and can operate stably in harsh environments, data read / write performance can be improved using this device.

[0116] Furthermore, connecting the aforementioned devices via optical fibers results in high optical path integration, making the data read / write device smaller than traditional data read / write devices constructed using optical components.

[0117] like Figure 8 As shown in the illustration, this application provides a data read / write device for data reading. The device includes a second laser 801, an optical fiber coupler 802, an optical fiber lens 803, and a detector 804. The optical fiber coupler 802 connects the second laser 801, the optical fiber lens 803, and the detector 804 via optical fibers. The second laser 801 outputs a first continuous laser beam. The optical fiber lens 803 receives the first continuous laser beam, focuses it onto an optical storage medium, and receives a first fluorescence signal generated by the optical storage medium based on the first continuous laser beam. This first fluorescence signal indicates the data to be read. The detector 804 detects the intensity of the first fluorescence signal to obtain the data to be read.

[0118] Optionally, the fiber optic coupler 802 can be a 1×2 fiber optic coupler, with the first port of the fiber optic coupler 802 connected to the fiber optic lens 803, the first port of the second port connected to the second laser 801, and the second port of the second port connected to the detector 804.

[0119] It should be noted that the fiber optic coupler 802 described above can also be a fiber optic coupler of other specifications (e.g., a 1×N fiber optic coupler). Different specifications of fiber optic couplers can be selected according to specific needs, and this application embodiment does not limit the choice.

[0120] The data read / write device provided in this application embodiment can read data stored in an optical storage medium (transparent optical disc). It should be noted that this application embodiment does not limit how the data stored in the optical storage medium is written. For a detailed description of the data reading process of this data read / write device, as well as the description of the second laser 801, fiber optic lens 803, and detector 704 in the data read / write device, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0121] Combination Figure 8 ,like Figure 9 As shown, in one implementation, the data reading and writing device provided in this application embodiment further includes an isolator 805, which is connected to the second laser 801 and the fiber coupler 802 via optical fibers, respectively. The isolator 805 is used to prevent the first fluorescence signal from being transmitted to the second laser 801.

[0122] In this embodiment, if the first fluorescent signal is reflected to the second laser 801, it may damage the second laser 801. By connecting an isolator 805 to one end of the second laser 801, the first fluorescent signal is prevented from entering the second laser 801, thus ensuring the safe operation of the second laser 801.

[0123] Combination Figure 9 ,like Figure 10 As shown, in one implementation, the data reading and writing device provided in this application embodiment further includes a bandpass filter 806, which is connected to a detector 804 and an optical fiber coupler 802 respectively. The bandpass filter 806 is used to receive a first fluorescence signal and filter the first fluorescence signal. The detector 804 is specifically used to detect the light intensity of the filtered first fluorescence signal in order to obtain the data to be read.

[0124] The aforementioned bandpass filter 806 can filter out stray light and reflected light in the first fluorescence signal, improve the signal-to-noise ratio of the first fluorescence signal, and make the data to be read detected by the detector 804 more accurate.

[0125] Combination Figure 10 ,like Figure 11 As shown, in one implementation, the data reading and writing device provided in this application embodiment further includes a piezoelectric actuator 807 for driving the fiber optic lens 803 to move, so as to adjust the position of the fiber optic lens 803, the position of the fiber optic lens 803 corresponding to the position of the data recording point on the optical storage medium.

[0126] The piezoelectric actuator 807 described above can drive the fiber optic lens 803 to move in three-dimensional space to adjust the position of the fiber optic lens 703, thereby reading the data recorded by the data recording points at different positions in the optical storage medium.

[0127] Further descriptions of the isolator 805, bandpass filter 806, and piezoelectric actuator 807 can be found in the above embodiments and will not be repeated here.

[0128] This application provides a data read / write device. The fiber optic lens in this device focuses a first continuous laser beam output from a second laser onto an optical storage medium and receives a first fluorescence signal generated by the optical storage medium based on the first continuous laser beam. This first fluorescence signal indicates the data to be read. A detector then detects the intensity of the first fluorescence signal to obtain the data to be read. The devices in this data read / write device are fiber optic devices, and these devices are connected via optical fiber coupling. Because fiber optic devices are insensitive to the external environment and can operate stably in harsh environments, data read / write performance can be improved using this data read / write device.

[0129] Furthermore, connecting the aforementioned devices via optical fibers results in high optical path integration, making the data read / write device smaller than traditional data read / write devices constructed using optical components.

[0130] Furthermore, embodiments of this application provide a data read / write device that can be used for parallel data writing and parallel data reading, such as... Figure 12 As shown, the data read / write device includes: a first laser 1201, a dispersion compensator 1202, a first fiber optic coupler 1203, N optical switches 1204, an N-channel photoelectric controller 1205, and N fiber optic lenses 1206. The first fiber optic coupler 1203 is connected to each of the N optical switches 1204 via optical fibers. The N-channel photoelectric controller 1205 is connected to each of the N optical switches 1204. The N optical switches 1204 are correspondingly connected to the N fiber optic lenses 1206 via optical fibers, where N is a positive integer greater than or equal to 2. The system comprises: a first laser 1201 for outputting a first optical pulse; a dispersion compensator 1202 for performing dispersion compensation on the first optical pulse to output a second optical pulse; a first fiber coupler 1203 connected to the dispersion compensator 1202 via an optical fiber for splitting the second optical pulse into N optical pulses; an N-channel photoelectric controller 1205 for controlling the states of N optical switches 1204 according to N control signals to adjust the light intensity of the N optical pulses, wherein the N control signals are obtained based on N data to be written, and the N optical pulses are used to indicate the N data to be written; and N fiber lenses 1206 for focusing the N optical pulses onto the optical storage medium to write the N data to be written into the optical storage medium, wherein each of the N fiber lenses corresponds one-to-one with one of the N optical pulses.

[0131] The first fiber optic coupler 1203 is a 1×N fiber optic coupler. The first fiber optic coupler is used as a beam splitter. When the data to be written includes multiple components, the first fiber optic coupler 1203 splits the first optical pulse into N identical optical pulses.

[0132] In this embodiment, the optical path control module of the optical storage system generates N control signals based on N data to be written, and inputs these N control signals to an N-channel photoelectric controller 1205. The N-channel photoelectric controller 1205 controls the switching states of N optical switches 1204 according to the N control signals, thereby adjusting the light intensity of the N light pulses to correspond to the N data to be written. The switching state of the optical switches refers to their degree of closure. For example, if the N-channel photoelectric controller controls the first optical switch to 80% closure and the second optical switch to 50% closure, the light intensity of the light pulse output by the first optical switch will be different from that of the second optical switch.

[0133] Furthermore, each of the N fiber optic lenses 1206 focuses one of the corresponding optical pulses (out of the N optical pulses) onto the optical storage medium to write the set of data to be written into the optical storage medium. For example, the first fiber optic lens is used to focus the optical pulse output by the first optical switch (also referred to as the first optical pulse) onto the optical storage medium, the second fiber optic lens is used to focus the optical pulse output by the second optical switch (also referred to as the second optical pulse) onto the optical storage medium, and so on, with the Nth fiber optic lens used to focus the optical pulse output by the Nth optical switch (also referred to as the Nth optical pulse) onto the optical storage medium, thereby writing N data into the optical storage medium in parallel, which can significantly improve the efficiency of data writing.

[0134] With the above Figure 1 The data read / write device shown is similar. The first laser 1201 can be a femtosecond laser or a picosecond laser, the dispersion compensator 1202 can include a chirp compensator, and the N fiber lenses 1206 can be GRIN fiber lenses. For a detailed description of each device, please refer to the relevant descriptions in the above embodiments, which will not be repeated here.

[0135] Combination Figure 12 ,like Figure 13As shown, in one implementation, the data read / write device provided in this application includes: a second laser 1207, a second fiber optic coupler 1208, N third fiber optic couplers 1209, and an N-channel detector 1210. The N third fiber optic couplers 1209 are respectively connected to the second fiber optic coupler 1208, the N fiber optic lenses 1206, and the N-channel detector 1210 via optical fibers. The second laser 1207 outputs a first continuous laser beam. The second fiber optic coupler 1208, connected to the second laser 1207 via optical fibers, splits the first continuous laser beam into N continuous laser beams. The N fiber optic lenses 1206 also receive the N continuous laser beams, focus them onto an optical storage medium, and receive the N fluorescence signals generated by the optical storage medium based on the N continuous laser beams. Each of the N fiber optic lenses 1206 corresponds one-to-one with one of the N continuous laser beams, and each of the N fluorescence signals indicates N data to be read. The N-channel detector 1210 detects the light intensity of each of the N fluorescence signals to obtain the N data to be read.

[0136] All of the above N third fiber couplers 1209 are 1×3 fiber couplers. Taking the first third fiber coupler as an example, the first port of the third fiber coupler 1209 is connected to the first fiber lens 1206, the first port of the second end is connected to the dispersion compensator 1202, the second port of the second end is connected to the second laser 1207, and the third port of the second end is connected to the N-channel detector 1210.

[0137] Optionally, the data read / write device provided in this application embodiment may also include 2*N 1×2 third fiber couplers. These 2*N third fiber couplers are divided into two groups, each group including N third fiber couplers. The N third fiber couplers in the first group correspond one-to-one with the N third fiber couplers in the second group. Specifically, taking the first third fiber coupler in the first group and the first third fiber coupler in the second group as examples, the... Figure 14 As shown, the first end of the third fiber coupler 1209a is connected to the first fiber lens 1206, and the first port of the second end of the third fiber coupler 1209a is connected to the dispersion compensator 1202; the first end of the third fiber coupler 1209b is connected to the second port of the second end of the third fiber coupler 1209a, the first port of the second end of the third fiber coupler 1209b is connected to the second laser 1207, and the second port of the second end is connected to the N-channel detector 1210.

[0138] Specifically, each of the N fiber optic lenses 1206 focuses one of the N continuous laser beams onto the optical storage medium and receives the fluorescence signal corresponding to that continuous laser beam, which is then transmitted to one of the channels of the N-channel detector 1210.

[0139] The aforementioned data read / write device can read N data items from an optical storage medium in parallel, significantly improving data reading efficiency.

[0140] Combination Figure 13 ,like Figure 15 As shown, in one implementation, the data read / write device provided in this application embodiment further includes an isolator 1211, which is connected to the second laser 1207 and the second fiber coupler 1208 via optical fibers, and isolator 1211 is used to prevent the above-mentioned N fluorescence signals from being transmitted to the second laser.

[0141] Similarly, isolator 1211 can prevent the above N fluorescent signals from entering the second laser 1207, thus ensuring that the second laser 1207 is not damaged by the fluorescent signals.

[0142] Combination Figure 15 ,like Figure 16 As shown, in one implementation, the data reading and writing device provided in this application embodiment further includes N bandpass filters 1212. The N bandpass filters 1212 are respectively connected to an N-channel detector 1210 and N third fiber couplers 1209 via optical fibers. The bandpass filters 1212 are used to receive N fluorescence signals output by the N optical lenses 1207 and filter the N fluorescence signals. The N bandpass filters correspond one-to-one with the N fluorescence signals. The N-channel detector 1210 is specifically used to detect the light intensity of the N filtered fluorescence signals to obtain N data to be read.

[0143] The aforementioned N bandpass filters 1212 can respectively filter out stray light and reflected light from the N fluorescence signals, improve the signal-to-noise ratio of the N fluorescence signals, and improve the accuracy of the read data.

[0144] Combination Figure 16 ,like Figure 17 As shown, in one implementation, the data reading and writing device provided in this application embodiment further includes a piezoelectric actuator 1213, which is used to drive N fiber optic lenses 1206 to move, so as to adjust the position of the N fiber optic lenses 1206, the positions of the N fiber optic lenses 1206 respectively corresponding to the positions of different data recording points on the optical storage medium.

[0145] The aforementioned piezoelectric actuator 1213 can drive N fiber optic lenses 1206 to move in three-dimensional space to adjust the positions of the N fiber optic lenses 1206, thereby writing data to data recording points at different locations in the optical storage medium, or reading data recorded at data recording points at different locations in the optical storage medium. It should be noted that the data read / write device in this embodiment includes a piezoelectric actuator that can simultaneously drive N fiber optic lenses to move in the same direction. Optionally, the N fiber optic lenses can be fixed together, and the piezoelectric actuator can be fixed to one side of one of the piezoelectric actuators.

[0146] It should be noted that other descriptions of the isolator 1211, bandpass filter 1212 and piezoelectric actuator 1213 can be found in the relevant descriptions of the above embodiments, and will not be repeated here.

[0147] like Figure 18 As shown in the figure, this application provides a data read / write device for parallel data reading. The device includes a second laser 1801, a second fiber optic coupler 1802, N third fiber optic couplers 1803, N fiber optic lenses 1804, and an N-channel detector 1805. The N third fiber optic couplers 1803 are respectively connected to the second fiber optic coupler 1802, the N fiber optic lenses 1804, and the N-channel detector 1805 via optical fibers. A second laser 1801 is used to output a first continuous laser beam; a second fiber coupler 1802 is connected to the second laser 1801 via an optical fiber and is used to split the first continuous laser beam into N continuous laser beams; N fiber lenses 1804 are used to receive the N continuous laser beams, focus the N continuous laser beams onto the optical storage medium, and receive the N fluorescence signals generated by the optical storage medium according to the N continuous laser beams. Each of the N fiber lenses 1804 corresponds to one of the N continuous laser beams, and the N fluorescence signals are used to indicate N data to be read; an N-channel detector 1805 is used to detect the light intensity of the N fluorescence signals to obtain the N data to be read.

[0148] Optionally, all of the above-mentioned N third fiber couplers 1803 can be 1×2 fiber couplers. For example, the first port of the first third fiber coupler 1803 is connected to the first fiber lens 1804, the first port of the second end is connected to the second laser 1801, and the second port of the second end is connected to the N-channel detector 1805.

[0149] It should be noted that the third fiber optic coupler 1803 mentioned above can also be a fiber optic coupler of other specifications (e.g., a 1×N fiber optic coupler). Different specifications of fiber optic couplers can be selected according to specific needs, and this application embodiment does not limit the choice.

[0150] The data reading and writing device provided in this application embodiment can read N data stored in an optical storage medium (transparent optical disc) in parallel, which can significantly improve the efficiency of data reading.

[0151] It should be noted that the embodiments of this application do not limit how the data stored in the optical storage medium is written. For a detailed description of the data reading process of the data reading and writing device, as well as the description of the second laser 1801, N fiber lenses 1804 and N-channel detector 1805 in the data reading and writing device, please refer to the relevant descriptions of the above embodiments, which will not be repeated here.

[0152] Combination Figure 18 ,like Figure 19 As shown, in one implementation, the data read / write device provided in this application embodiment further includes an isolator 1806, which is connected to the second laser 1801 and the second fiber coupler 1802 via optical fibers, respectively. The isolator 1806 is used to prevent N fluorescence signals from being transmitted to the second laser 1801.

[0153] Similarly, isolator 1806 can prevent the above N fluorescent signals from entering the second laser 1801, thus ensuring that the second laser 1801 is not damaged by the fluorescent signals.

[0154] Combination Figure 19 ,like Figure 20 As shown, in one implementation, the data read / write device provided in this application embodiment further includes N bandpass filters 1807. The N bandpass filters 1807 are respectively connected to an N-channel detector 1805 and N third fiber couplers 1803 via optical fibers. The bandpass filters 1807 are used to receive N fluorescence signals and filter the N fluorescence signals. The N bandpass filters correspond one-to-one with the N fluorescence signals. The N-channel detector 1805 is specifically used to detect the light intensity of the N filtered fluorescence signals to obtain N data to be read.

[0155] The aforementioned N bandpass filters 1807 can respectively filter out stray light and reflected light from N fluorescence signals, improve the signal-to-noise ratio of N fluorescence signals, and improve the accuracy of the read data.

[0156] Combination Figure 20 ,like Figure 21 As shown, in one implementation, the data reading and writing device provided in this application embodiment further includes a piezoelectric actuator 1808, which is used to drive N fiber optic lenses 1804 to move, so as to adjust the position of the N fiber optic lenses 1804, the positions of the N fiber optic lenses 1804 respectively corresponding to the positions of different data recording points on the optical storage medium.

[0157] The piezoelectric actuator 1808 described above can drive N fiber optic lenses 1804 to move in three-dimensional space to adjust the position of the N fiber optic lenses 1804, thereby reading the data recorded at different data recording points in the optical storage medium.

[0158] Further descriptions of the isolator 1806, bandpass filter 1807, and piezoelectric actuator 1808 can be found in the above embodiments and will not be repeated here.

[0159] This application also provides an electronic device, which includes an optical storage medium and Figures 1 to 7 The data read / write device, or Figures 8 to 11 The data read / write device, or Figures 12 to 17 The data read / write device, or Figures 18 to 21 The aforementioned data read / write device.

[0160] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any changes or substitutions within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A data read / write device, characterized in that, include: A first laser is used to output a first optical pulse according to a control signal, wherein the control signal is a signal obtained based on the data to be written. A dispersion compensator is used to perform dispersion compensation on the first optical pulse to output a second optical pulse; The dispersion compensator is an optical fiber device; An optical fiber lens, connected to the dispersion compensator via an optical fiber, is used to focus the second optical pulse onto the optical storage medium to write the data to be written into the optical storage medium.

2. The data read / write device according to claim 1, characterized in that, The data reading and writing device further includes: The system comprises a second laser, an optical fiber coupler, and a detector, wherein the optical fiber coupler is connected to the second laser, the optical fiber lens, and the detector via optical fibers. The second laser is used to output the first continuous laser beam; The fiber optic lens is also used to receive the first continuous laser, focus the first continuous laser onto the optical storage medium, and receive the first fluorescence signal generated by the optical storage medium according to the first continuous laser, wherein the first fluorescence signal is used to indicate the data to be read. The detector is used to detect the light intensity of the first fluorescence signal in order to obtain the data to be read.

3. The data read / write device according to claim 2, characterized in that, Also includes: An isolator, which connects the second laser and the fiber coupler via optical fibers, is used to prevent the first fluorescence signal from being transmitted to the second laser.

4. The data read / write device according to any one of claims 1 to 3, characterized in that, The first laser includes a femtosecond laser or a picosecond laser.

5. The data read / write device according to any one of claims 1 to 3, characterized in that, The dispersion compensator includes a chirp compensator.

6. A data read / write device, characterized in that, include: A laser, an optical fiber coupler, an optical fiber lens, and a detector; wherein the optical fiber coupler is a connecting device between optical fiber devices, and the optical fiber coupler connects the laser, the optical fiber lens, and the detector respectively through optical fibers; The laser is used to output a first continuous laser beam; The fiber optic lens is used to receive the first continuous laser, focus the first continuous laser onto the optical storage medium, and receive the first fluorescence signal generated by the optical storage medium according to the first continuous laser, wherein the first fluorescence signal is used to indicate the data to be read. The detector is used to detect the light intensity of the first fluorescence signal in order to obtain the data to be read.

7. The data read / write device according to claim 6, characterized in that, Also includes: An isolator, which connects the laser and the fiber coupler via optical fibers, is used to prevent the first fluorescence signal from being transmitted to the laser.

8. The data read / write device according to claim 2, 6, or 7, characterized in that, Also includes: A bandpass filter, connected to the detector and the fiber optic coupler respectively, is used to receive the first fluorescence signal and filter the first fluorescence signal; The detector is specifically used to detect the light intensity of the filtered first fluorescence signal in order to obtain the data to be read.

9. The data read / write device according to any one of claims 1 to 8, characterized in that, Also includes: A piezoelectric actuator is used to drive the fiber optic lens to move, thereby adjusting the position of the fiber optic lens, the position of which corresponds to the position of the data recording point on the optical storage medium.

10. The data read / write device according to any one of claims 2 to 8, characterized in that, The fiber optic lens includes any of the following: a gradient refractive index GRIN fiber optic lens, a metamaterial lens, or a fiber end sphere.

11. The data reading and writing device according to any one of claims 2 to 8, characterized in that, The wavelength range of the first continuous laser is 400~500 nanometers.

12. The data read / write device according to any one of claims 2 to 8, characterized in that, The wavelength of the first fluorescence signal is 600-700 nanometers.

13. A data read / write device, characterized in that, include: The system comprises a first laser, a dispersion compensator, a first fiber coupler, N optical switches, an N-channel photoelectric controller, and N fiber lenses; wherein the first fiber coupler is connected to the N optical switches via optical fibers, the N-channel photoelectric controller is connected to the N optical switches, and the N optical switches are connected to the N fiber lenses via optical fibers, where N is a positive integer greater than or equal to 2. The first laser is used to output the first optical pulse; The dispersion compensator is used to perform dispersion compensation on the first optical pulse to output a second optical pulse; the dispersion compensator is an optical fiber device. The first fiber coupler is connected to the dispersion compensator via an optical fiber and is used to split the second optical pulse into N optical pulses; The N-channel photoelectric controller is used to control the state of the N optical switches according to N control signals to adjust the light intensity of the N light pulses, wherein the N control signals are signals obtained respectively based on N data to be written, and the N light pulses are used to indicate the N data to be written; The N fiber optic lenses are used to focus the N light pulses onto the optical storage medium to write the N data to be written into the optical storage medium, wherein the N fiber optic lenses correspond one-to-one with the N light pulses.

14. The data read / write device according to claim 13, characterized in that, The data reading and writing device further includes: a second laser, a second fiber coupler, N third fiber couplers, and an N-channel detector, wherein the N third fiber couplers are respectively connected to the second fiber coupler, the N fiber lenses, and the N-channel detector via optical fibers; The second laser is used to output the first continuous laser beam; The second fiber coupler, connected to the second laser via an optical fiber, is used to split the first continuous laser into N continuous laser beams; The N fiber optic lenses are also used to receive the N continuous laser beams, focus the N continuous laser beams onto the optical storage medium, and receive the N fluorescence signals generated by the optical storage medium according to the N continuous laser beams. The N fiber optic lenses correspond one-to-one with the N continuous laser beams, and the N fluorescence signals are used to indicate N data to be read. The N-channel detector is used to detect the light intensity of the N fluorescence signals respectively, so as to obtain the N data to be read.

15. A data read / write device, characterized in that, include: The system comprises a second laser, a second fiber coupler, N third fiber couplers, N fiber lenses, and an N-channel detector, wherein the N third fiber couplers are connecting devices between fiber optic devices, and the N third fiber couplers are respectively connected to the second fiber coupler, the N fiber lenses, and the N-channel detector via optical fibers. The second laser is used to output the first continuous laser beam; The second fiber coupler, connected to the second laser via an optical fiber, is used to split the first continuous laser into N continuous laser beams. The N fiber optic lenses are used to receive the N continuous laser beams, focus the N continuous laser beams onto the optical storage medium, and receive the N fluorescence signals generated by the optical storage medium according to the N continuous laser beams. The N fiber optic lenses correspond one-to-one with the N continuous laser beams, and the N fluorescence signals are used to indicate N data to be read. The N-channel detector is used to detect the light intensity of the N fluorescence signals respectively, so as to obtain the N data to be read.

16. The data read / write device according to claim 14 or 15, characterized in that, Also includes: An isolator, connected to the second laser and the second fiber coupler via optical fibers, is used to prevent the N fluorescence signals from being transmitted to the second laser.

17. The data read / write apparatus according to any one of claims 14 to 16, characterized in that, Also includes: N bandpass filters are connected to the N-channel detector and the N third fiber couplers via optical fibers, respectively, to receive the N fluorescence signals and filter the N fluorescence signals. The N bandpass filters correspond one-to-one with the N fluorescence signals. The N-channel detector is specifically used to detect the light intensity of the filtered N fluorescence signals to obtain the data to be read.

18. The data read / write apparatus according to any one of claims 13 to 17, characterized in that, Also includes: A piezoelectric actuator is used to drive the N fiber optic lenses to move, thereby adjusting the positions of the N fiber optic lenses, the positions of the N fiber optic lenses respectively corresponding to the positions of different data recording points on the optical storage medium.

Images