CN1195299C - Femtosecond laser 3D storage write-in device - Google Patents
Femtosecond laser 3D storage write-in device Download PDFInfo
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- CN1195299C CN1195299C CNB021394970A CN02139497A CN1195299C CN 1195299 C CN1195299 C CN 1195299C CN B021394970 A CNB021394970 A CN B021394970A CN 02139497 A CN02139497 A CN 02139497A CN 1195299 C CN1195299 C CN 1195299C
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- convex lens
- mobile platform
- dimensional
- installing plate
- dimensional mobile
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Abstract
The present invention relates to a device using femtosecond laser for three-dimensional optical storage and write. A titanium sapphire chirped pulse regenerative amplifier is arranged at one side of a mounting plate in the direction of a horizontal optical axis, and a reflecting mirror is arranged at the other side; a focusing convex lens is arranged at the inner side of the titanium sapphire chirped pulse regenerative amplifier on the mounting plate in the direction of the same horizontal optical axis, and attenuating pieces are arranged at the inner side of the reflecting mirror; a collimating and beam-expanding convex lens is arranged between the focusing convex lens and the attenuating pieces on the mounting plate in the direction of the same horizontal optical axis; a three-dimensional mobile platform is installed on the mounting plate in the direction of a vertical optical axis forming a minus 45-degree angle together with the reflecting mirror; a writing optical head is installed between the reflecting mirror and the three-dimensional mobile platform on the mounting plate, and a memory medium is arranged on the three-dimensional mobile platform; the three-dimensional mobile platform is connected with a computer through electric cables, and the computer is connected to the titanium sapphire chirped pulse regenerative amplifier through electric cables. The present invention has the advantages of high storage capacity, long storage lifetime, good chemical stability, etc.
Description
Technical field
The invention belongs to technical field of information storage, be specifically related to the record realized with optical means or reproduction by selected material or by structure or the record carrier distinguished by form.
Background technology
In optical storage technology, the general density of data storage is subjected to the restriction of light wave diffraction limit, and its measuring point is about wavelength magnitude, and the resting period is subjected to the storage life restriction of storage medium, storage time, generally about 10 years, present one abundant cd side density was: 0.5～1Gbit/in
2, be about 10
8Bit/cm
2, the capacity of 5 inches maximum stored CDs is 2.8 * 10
10Every of bit/, generally have only 20 years the storage time of hard disc of computer.How can more effective raising storage density and the serviceable life and the shelf life of storer be the hot subject of scientist and engineering technical personnel's research always.
Summary of the invention
Technical matters to be solved by this invention and solve the technical scheme that its technical matters adopts and be: the axial side of horizon light is provided with titanium jewel twitter pulse regeneration amplifier on installing plate, opposite side is provided with catoptron, the inboard of same horizon light direction of principal axis titanium jewel twitter pulse regeneration amplifier is provided with the focusing convex lens on installing plate, the inboard of catoptron is provided with attenuator, focus between convex lens and the attenuator at same horizon light direction of principal axis on the installing plate and to be provided with the collimator and extender convex lens, on installing plate, become with catoptron-the vertical optical axis direction of 45 is provided with three-dimensional mobile platform, between installing plate upper reflector and three-dimensional mobile platform, be provided with and write shaven head, three-dimensional mobile platform is provided with quartz glass, three-dimensional mobile platform is connected with computing machine by cable, and computing machine is connected with titanium jewel twitter pulse regeneration amplifier by cable.
The radius-of-curvature of focusing convex lens of the present invention is that the radius-of-curvature of 15～25mm, collimator and extender convex lens is 45～75mm, and the focusing convex lens are 1: 3 with the radius-of-curvature ratio of collimator and extender convex lens.
The numerical aperture that writes shaven head of the present invention is 0.45～0.8.
The present invention adopts femtosecond pulse to realize the density three-dimensional data storage in transparent medium, and it is to utilize high intensity pulses laser specified location generation nonlinear effect and produce small cavity in dielectric, reaches the purpose of record data.Its storage medium adopts transparent optical material, if adopting quartz glass has characteristics such as acid and alkali-resistance, high temperature and humidity, this is that normal optical disk and hard disc of computer are incomparable, this have storage medium recorded information, can preserve for a long time, and the storage density of its data can reach 2 * 10
11Bit/m
3, can reach the centuries storage time.The present invention compares with optical storage system in the market that to have memory space big, and shelf life is long, good chemical stability.
Description of drawings
Fig. 1 is the structural representation of an embodiment of the utility model.
Embodiment
The present invention is described in more detail below in conjunction with drawings and Examples, but the invention is not restricted to these embodiment.
Embodiment 1
In Fig. 1, the femtosecond laser th ree-dimensional optical storage writing station of present embodiment by titanium jewel twitter pulse regeneration amplifier 1, focus on convex lens 2, collimator and extender convex lens 3, attenuator 4, catoptron 5, write shaven head 6, storage medium 7, three-dimensional mobile platform 8, computing machine 9, installing plate 10 connect and constitute.
The axial left side of horizon light is equipped with titanium jewel twitter pulse regeneration amplifier 1 on installing plate 10, the right side is equipped with catoptron 5, titanium jewel twitter pulse regeneration amplifier 1 can produce pumping laser, by titanium jewel twitter pulse regeneration amplifier 1 generation 150 little Jiao, repetition rate 1～5KHz pulse width is the Laser emission of 100 femtoseconds, catoptron 5 and horizontal optical axis the negative sense angle be 45 °, catoptron 5 is used for titanium jewel twitter pulse regeneration amplifier 1 emitted laser is reflected away along the vertical optical axis direction.The installed inside of same horizon light direction of principal axis titanium jewel twitter pulse regeneration amplifier 1 has the convex lens 2 of focusing on installing plate 10, the radius-of-curvature that focuses on convex lens 2 is 20mm, the installed inside of horizon light direction of principal axis catoptron 5 has attenuator 4 on the installing plate 10, between little Jiao in energy adjustment to 1～0.5 of attenuator 4 with the monopulse laser of femtosecond pulse pumping laser.Focus between convex lens 2 and the attenuator 4 at same horizon light direction of principal axis on the installing plate 10 collimator and extender convex lens 3 are installed, the radius-of-curvature of collimator and extender convex lens 3 is 60mm, it is the 6mm laser beam that focusing convex lens 2 and collimator and extender convex lens 3 expand titanium jewel twitter pulse regeneration amplifier 1 ejaculation laser spot to diameter, on installing plate 10, three-dimensional mobile platform 8 is installed with the vertical optical axis direction of 5 one-tenth of catoptrons-45, between installing plate 10 upper reflectors 5 and three-dimensional mobile platform 8, be equipped with and write shaven head 6, the numerical aperture that writes shaven head 6 is 0.6, be placed with storage medium 7 on the three-dimensional mobile platform 8, write shaven head 6 and an energy can be about 1 little Jiao, pulse width is that the laser pulse of 100 femtoseconds tightly focuses in the storage medium 7, moving three dimension platform 8 changes the position of focus, realize the record of three-dimensional data, three-dimensional mobile platform 8 is connected with computing machine 9 by cable.The storage medium 7 of present embodiment is a quartz glass, has characteristics such as acid and alkali-resistance, high temperature and humidity, and the information of this quartz glass record can permanently be preserved, and can reach the centuries storage time.Storage medium 7 also can adopt other transparent optical material.The High Power Femtosecond Laser pulse is tightly focused on storage medium 7 inside, when the power density of focus surpasses the nonlinear effect threshold value of material, the nonlinear effect of this high intensity pulses laser and medium interaction, can produce the high-temperature plasma microexplosion at the focus place, form a submicron-scale structural change (cavity), by changing the position of focus, recording data information in storage medium.When interacting, femtosecond light pulse and storage medium pass through the multiphoton ionization process of motivation, can produce a high temperature, highdensity plasma structure rapidly in the part, absorb most of laser energy, near storage medium 7 body inner focusing points, material is melted, produce a small cavity, in this process, liquid state can not occur, directly change the partial structurtes of material by the microexplosion of high-temperature plasma.With respect to long pulse and continuous wave laser, femto-second laser pulse does not produce heat effect zone and fire damage, can more critically change the local physical arrangement of medium, finally can realize the microexplosion structure of submicron order.It is 2 * 10 that storage medium 7 has reached storage density
11Bit/cm
3, even higher storage density.Synchronous operation between speed, position, acceleration and the information flow of computing machine 9 control moving three dimension mobile platforms 8 is to realize correctly writing of information.Computing machine 9 is connected with titanium jewel twitter pulse regeneration amplifier 1 by cable, computing machine 9 is given titanium jewel twitter pulse regeneration amplifier 1 data transmission of pre-stored, the pumping laser emission of modulation titanium jewel twitter pulse regeneration amplifier 1 realizes writing laser beam and is written into the information modulation.
Embodiment 2
In the present embodiment, the radius-of-curvature that focuses on convex lens 2 is 15mm, and the radius-of-curvature of collimator and extender convex lens 3 is 45mm, and the numerical aperture that writes shaven head 6 is 0.45.The connecting relation of other parts and parts is identical with embodiment 1.
Embodiment 3
In the present embodiment, the radius-of-curvature that focuses on convex lens 2 is 25mm, and the radius-of-curvature of collimator and extender convex lens 3 is 75mm, and the numerical aperture that writes shaven head 6 is 0.8.The connecting relation of other parts and parts is identical with embodiment 1.
In order to verify beneficial effect of the present invention, the femtosecond laser th ree-dimensional optical storage writing station that the inventor adopts first embodiment of the invention to make, after tested, the diameter of recorded bit is 0.5 μ m, the data bit dot spacing is that 1 * 1 * 7 μ m are (promptly in one deck, dot spacing is 1 * 1 μ m, and layer is 5 μ m with the spacing of layer), recording density is about 2 * 10
11Bit/cm
3
Principle of work of the present invention is as follows
Femtosecond laser by 1 output of titanium jewel twitter pulse regeneration amplifier passes through to focus on convex lens 2 and collimator and extender convex lens 3, expand laser facula to light beam that diameter is 6mm, be adjusted between 1～0.5 little Jiao by the monopulse laser energy of attenuator 4 again femto-second laser pulse, catoptron 5 changes 90 degree with the femto-second laser pulse direction of propagation, by writing shaven head 6 femto-second laser pulse focused on storage medium 7 inside again, change the position of focus by moving of three-dimensional platform, realize the record of three-dimensional data.Speed, position, the acceleration of 9 pairs of moving three dimension platforms of computing machine are controlled, computing machine 9 is given titanium jewel twitter pulse regeneration amplifier 1 data transmission of pre-stored, the pumping laser emission of modulation titanium jewel twitter pulse regeneration amplifier 1 realizes writing laser pulse and is written into the information modulation.
According to above-mentioned principle, also can design the femtosecond laser th ree-dimensional optical storage writing station of another concrete structure.
Claims (3)
1, a kind of femtosecond laser th ree-dimensional optical storage writing station, it is characterized in that: go up the axial side of horizon light at installing plate [10] and be provided with titanium jewel twitter pulse regeneration amplifier [1], opposite side is provided with catoptron [5], be provided with focusing convex lens [2] in the inboard of last same the horizon light direction of principal axis titanium jewel twitter pulse regeneration amplifier of installing plate [10] [1], the inboard of catoptron [5] is provided with attenuator [4], between last same horizon light direction of principal axis focusing convex lens [2] of installing plate [10] and attenuator [4], be provided with collimator and extender convex lens [3], go up to become with catoptron [5] at installing plate [10]-the vertical optical axis direction of 45 is provided with three-dimensional mobile platform [8], between installing plate [10] upper reflector [5] and three-dimensional mobile platform [8], be provided with and write shaven head [6], three-dimensional mobile platform [8] is provided with quartz glass, three-dimensional mobile platform [8] is connected with computing machine [9] by cable, and computing machine [9] is connected with titanium jewel twitter pulse regeneration amplifier [1] by cable.
2, according to the described femtosecond laser th ree-dimensional optical storage of claim 1 writing station, it is characterized in that: the radius-of-curvature of said focusing convex lens [2] is that the radius-of-curvature of 15～25mm, collimator and extender convex lens [3] is 45～75mm, and the radius-of-curvature ratio that focuses on convex lens [2] and collimator and extender convex lens [3] is 1: 3.
3, according to the described femtosecond laser th ree-dimensional optical storage of claim 1 writing station, it is characterized in that: the said numerical aperture that writes shaven head [6] is 0.45～0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021394970A CN1195299C (en) | 2002-11-01 | 2002-11-01 | Femtosecond laser 3D storage write-in device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB021394970A CN1195299C (en) | 2002-11-01 | 2002-11-01 | Femtosecond laser 3D storage write-in device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1405768A CN1405768A (en) | 2003-03-26 |
| CN1195299C true CN1195299C (en) | 2005-03-30 |
Family
ID=4750111
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB021394970A Expired - Fee Related CN1195299C (en) | 2002-11-01 | 2002-11-01 | Femtosecond laser 3D storage write-in device |
Country Status (1)
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|---|---|
| CN (1) | CN1195299C (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108015414B (en) * | 2017-11-23 | 2020-07-14 | 北京环境特性研究所 | Laser three-dimensional inner engraving processing energy dynamic compensation system and operation method thereof |
-
2002
- 2002-11-01 CN CNB021394970A patent/CN1195299C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1405768A (en) | 2003-03-26 |
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