CN108111231B - Acousto-optic coupling frequency shift encryption device - Google Patents
Acousto-optic coupling frequency shift encryption device Download PDFInfo
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- CN108111231B CN108111231B CN201711274312.1A CN201711274312A CN108111231B CN 108111231 B CN108111231 B CN 108111231B CN 201711274312 A CN201711274312 A CN 201711274312A CN 108111231 B CN108111231 B CN 108111231B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
- H04B10/85—Protection from unauthorised access, e.g. eavesdrop protection
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
- H04B10/548—Phase or frequency modulation
- H04B10/556—Digital modulation, e.g. differential phase shift keying [DPSK] or frequency shift keying [FSK]
- H04B10/5563—Digital frequency modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
Abstract
The invention belongs to the technical field of acousto-optic engineering, and particularly relates to an acousto-optic coupling frequency shift encryption device. Compared with the prior art, the invention has the following beneficial effects: compared with the prior art, the acousto-optic coupling frequency shift encryption technology provided by the technical scheme has the following beneficial effects: 1) compared with the prior art, the technology focuses on the research of encryption algorithm, and the technology focuses on preventing the occurrence of secret stealing events from the whole secret world and from the whole chain of information transmission; 2) even if the password information is decoded, the protected information can not be obtained under the condition that the technical device is not provided; 3) even if the technical device is stolen, the matched biological identification modes such as fingerprint identification, iris identification and the like can prevent the device from being normally used; the verification code matched with the first password is generated, identified and verified by the background, so that the discovered probability is greatly reduced.
Description
Technical Field
The invention belongs to the technical field of acousto-optic engineering, and particularly relates to an acousto-optic coupling frequency shift encryption device.
Background
The encryption technology of information transmission has important significance for national defense, enterprises or individuals, and the technical requirement for protecting ciphertext information is more urgent along with the increasing development of the encryption technology.
In the field of information encryption, a method combining electronics and mathematics is widely used at present, people use various simple methods to realize encryption in the past, and different subject technologies such as sound, light, biology and the like are used to realize information encryption along with the technical progress. An encryption technology based on analog voice is researched in 2014 of the li wenjuan major of the university of western's electronics science, an image selection encryption technology combined with compression coding is researched in 2014 of the judgmental major of the university of Chongqing, an encryption technology retaining a format is researched in 2012 of the li min doctor of the university of south China, and an image encryption technology based on double random phase coding and an interference principle is researched in 2013 of the wang xiaojun doctor of the university of Zhejiang. In the field of encryption technology, research on encryption algorithms is very common, and reports on the overall technology of how to prevent information theft from the source are very rare.
The modern secret stealing technology is summarized as follows:
1. collecting wireless communication data through a reconnaissance monitoring network;
2. wirebound communication data is eavesdropped by physical overlap. Optical fiber communication has the advantages of large transmission capacity, long distance, small error and the like, and is the most important communication mode at present. The optical fiber communication radiation is not large, and signals are not easy to intercept in an induction mode, so that a thief deploys data acquisition equipment at positions such as an optical fiber communication relay station and the like to acquire all communication data under the condition of no damage to normal communication;
3. acquiring data by cooperating with an internet service provider;
4. obtaining data by deciphering the password;
5. mining useful information through correlation analysis and fusion analysis;
6. network attacks;
7. and (4) wireless access.
Disclosure of Invention
Technical problem to be solved
The technical problem to be solved by the invention is as follows: aiming at the defects of the existing encryption technology, how to provide a safer encryption means.
(II) technical scheme
In order to solve the above technical problem, the present invention provides an acousto-optic coupling frequency shift encryption apparatus, which includes: the device comprises a box cover 1, a pinion 2, an acousto-optic device 3, an ultrasonic generator 4, a gearwheel 5, a photoelectric conversion device 6, a control line 7, a signal line 8, a controller 9, an optical fiber 10, a light splitter 11, a light source 12, a rotating shaft 13, a rack 14, a pin 15, a box body 16, a control line 17, a servo motor 18, a light shielding plate 19, a reflective ring 20, a pointer 21 and scales 22.
Wherein, the pinion 2 is fixedly connected with a servo motor 18 and is arranged in the box body 16 together with the bull gear 5; the ultrasonic generator 4 is arranged on the box cover 1, the acousto-optic device 3 is fixedly connected with the ultrasonic generator 4, and a certain gap is formed between the acousto-optic device and the end face of the big gear 5.
The servo motor 18 drives the pinion 2 to rotate, the pinion 2 is meshed with the gearwheel 5, then the pinion 2 drives the gearwheel 5 to rotate, light emitted by the light source 12 is reflected by the reflecting ring 20, the light is reflected again on the inner wall of the case cover 1, and then the light is emitted to the reflecting ring again, and then the light enters the photoelectric conversion device 6 after being reflected for multiple times; since the light irradiates on the moving object and the reflected light undergoes doppler shift, the light received by the photoelectric conversion device 6 has a different frequency from the light emitted by the light source 12; the degree of frequency shift is related to the speed of the moving object, so the magnitude of the rotation speed of the large gear 5 affects the frequency of the light received by the photoelectric conversion device 6.
Wherein the light shielding plate 19 is used to prevent further reflection of light so as not to cause interference.
The ultrasonic wave emitted by the ultrasonic generator 4 acts on the acousto-optic device 3, so that the acousto-optic device 3 plays a role of a grating, and the light transmission frequency and the light transmission of the acousto-optic device 3 can be controlled by controlling the frequency or the on-off state of the ultrasonic wave emitted by the ultrasonic generator 4.
The light source 12 is configured to rotate around the rotating shaft 13 within a certain range, so that the change of the incident angle of the light on the reflective ring 20 changes the reflection frequency of the light between the reflective ring and the case cover, and the change of the reflection frequency directly affects the frequency shift of the light incident to the photoelectric conversion device.
The pointer 21 and the scale 22 are used for calibrating the rotation angle of the rotating shaft 13.
Wherein, the rack 14 is fixed on the box 16, and the rotating shaft 13 is connected with the rack 14. The cover 1 is positioned on the box 16 by pins 15 and connected by screws.
One end of the control line 7 is connected with the ultrasonic generator 4, and the other end is connected with the controller 9 and used for controlling the characteristic parameters of the ultrasonic waves; the signal line 8 is used for transmitting information received by the photoelectric conversion device 6 to the controller 9; one end of the control line 17 is connected with the servo motor 18, and the other end is connected with the controller 9 and used for controlling the rotating speed of the servo motor 18.
Wherein, the light emitted by the light source 12 enters the photoelectric conversion device 6 through the light splitter 11 and the optical fiber 10, and then enters the controller 9 after being changed into an electric signal, the controller 9 processes the signal according to a set coding rule to form a password, the other path of light with frequency shift enters the photoelectric conversion device 6, and then enters the controller 9 after being changed into the electric signal, the controller 9 processes the signal according to the set coding rule to form another path of matched verification code, the two paths of passwords are used for encrypting data, because the matched verification code is automatically generated by an instrument and is influenced by the rotating speed, the angle and the ultrasonic frequency, the setting of the rotating speed, the angle and the ultrasonic frequency can be automatically adjusted according to the date and also can be circularly changed according to a specific channel rule, because the parameters and the rule are agreed by a sender and a decryption party in advance and do not pass through a network, and the instrument is not owned by a third party, so that the safety is enhanced.
(III) advantageous effects
Compared with the prior art, the invention has the following beneficial effects: compared with the prior art, the acousto-optic coupling frequency shift encryption technology provided by the technical scheme has the following beneficial effects:
1) compared with the prior art, the technology focuses on the research of encryption algorithm, and the technology focuses on preventing the occurrence of secret stealing events from the whole secret world and from the whole chain of information transmission;
2) even if the password information is decoded, the protected information can not be obtained under the condition that the technical device is not provided;
3) even if the technical device is stolen, the matched biological identification modes such as fingerprint identification, iris identification and the like can prevent the device from being normally used; the verification code matched with the first password is generated, identified and verified by the background, so that the discovered probability is greatly reduced.
Drawings
FIG. 1 is a schematic view of the structure of FIG. 1;
FIG. 2 is a partial block diagram;
Detailed Description
In order to make the objects, contents, and advantages of the present invention clearer, the following detailed description of the embodiments of the present invention will be made in conjunction with the accompanying drawings and examples.
To solve the above technical problem, the present invention provides an acousto-optic coupling frequency shift encryption apparatus, as shown in fig. 1 and 2, comprising: the device comprises a box cover 1, a pinion 2, an acousto-optic device 3, an ultrasonic generator 4, a gearwheel 5, a photoelectric conversion device 6, a control line 7, a signal line 8, a controller 9, an optical fiber 10, a light splitter 11, a light source 12, a rotating shaft 13, a rack 14, a pin 15, a box body 16, a control line 17, a servo motor 18, a light shielding plate 19, a reflective ring 20, a pointer 21 and scales 22.
Wherein, the pinion 2 is fixedly connected with a servo motor 18 and is arranged in the box body 16 together with the bull gear 5; the ultrasonic generator 4 is arranged on the box cover 1, the acousto-optic device 3 is fixedly connected with the ultrasonic generator 4, and a certain gap is formed between the acousto-optic device and the end face of the big gear 5.
The servo motor 18 drives the pinion 2 to rotate, the pinion 2 is meshed with the gearwheel 5, then the pinion 2 drives the gearwheel 5 to rotate, light emitted by the light source 12 is reflected by the reflecting ring 20, the light is reflected again on the inner wall of the case cover 1, and then the light is emitted to the reflecting ring again, and then the light enters the photoelectric conversion device 6 after being reflected for multiple times; since the light irradiates on the moving object and the reflected light undergoes doppler shift, the light received by the photoelectric conversion device 6 has a different frequency from the light emitted by the light source 12; the degree of frequency shift is related to the speed of the moving object, so the magnitude of the rotation speed of the large gear 5 affects the frequency of the light received by the photoelectric conversion device 6.
Wherein the light shielding plate 19 is used to prevent further reflection of light so as not to cause interference.
The ultrasonic wave emitted by the ultrasonic generator 4 acts on the acousto-optic device 3, so that the acousto-optic device 3 plays a role of a grating, and the light transmission frequency and the light transmission of the acousto-optic device 3 can be controlled by controlling the frequency or the on-off state of the ultrasonic wave emitted by the ultrasonic generator 4.
The light source 12 is configured to rotate around the rotating shaft 13 within a certain range, so that the change of the incident angle of the light on the reflective ring 20 changes the reflection frequency of the light between the reflective ring and the case cover, and the change of the reflection frequency directly affects the frequency shift of the light incident to the photoelectric conversion device.
The pointer 21 and the scale 22 are used for calibrating the rotation angle of the rotating shaft 13.
Wherein, the rack 14 is fixed on the box 16, and the rotating shaft 13 is connected with the rack 14. The cover 1 is positioned on the box 16 by pins 15 and connected by screws.
One end of the control line 7 is connected with the ultrasonic generator 4, and the other end is connected with the controller 9 and used for controlling the characteristic parameters of the ultrasonic waves; the signal line 8 is used for transmitting information received by the photoelectric conversion device 6 to the controller 9; one end of the control line 17 is connected with the servo motor 18, and the other end is connected with the controller 9 and used for controlling the rotating speed of the servo motor 18.
Wherein, the light emitted by the light source 12 enters the photoelectric conversion device 6 through the light splitter 11 and the optical fiber 10, and then enters the controller 9 after being changed into an electric signal, the controller 9 processes the signal according to a set coding rule to form a password, the other path of light with frequency shift enters the photoelectric conversion device 6, and then enters the controller 9 after being changed into the electric signal, the controller 9 processes the signal according to the set coding rule to form another path of matched verification code, the two paths of passwords are used for encrypting data, because the matched verification code is automatically generated by an instrument and is influenced by the rotating speed, the angle and the ultrasonic frequency, the setting of the rotating speed, the angle and the ultrasonic frequency can be automatically adjusted according to the date and also can be circularly changed according to a specific channel rule, because the parameters and the rule are agreed by a sender and a decryption party in advance and do not pass through a network, and the instrument is not owned by a third party, so that the safety is enhanced.
The first password generated through a series of processing procedures according to parameters such as rotating speed, angle, ultrasonic frequency and the like is shared by a sender and a decryptor, corresponding information generated through the device is a background verification code, and is automatically encrypted for the ciphertext according to a certain rule without being known, and under the condition that the first password and the corresponding verification code do not pass authentication, the ciphertext is read, the logic bomb embedded in the ciphertext is activated, and the ciphertext is destroyed.
The device is activated by reading the biological characteristic, so that the device can be used by only a specific individual, and the device is prevented from being stolen.
Example 1
In this embodiment, as shown in fig. 1 and fig. 2, the acousto-optic coupling frequency shift encryption device of this embodiment includes a case cover 1, a pinion 2, an acousto-optic device 3, an ultrasonic generator 4, a gearwheel 5, a photoelectric conversion device 6, a control line 7, a signal line 8, a controller 9, an optical fiber 10, a beam splitter 11, a light source 12, a rotating shaft 13, a rack 14, a pin 15, a case 16, a control line 17, a servo motor 18, a light shielding plate 19, a reflective ring 20, a pointer 21, and a scale 22.
The small gear 2 is fixedly connected with a servo motor 18 and is arranged in the box body 16 together with the large gear 5; the ultrasonic generator 4 is arranged on the box cover 1, the acousto-optic device 3 is fixedly connected with the ultrasonic generator 4, and a certain gap is formed between the acousto-optic device and the end face of the big gear 5.
The servo motor 18 drives the small gear 2 to rotate, the small gear 2 is meshed with the large gear 5, then the small gear 2 drives the large gear 5 to rotate, light emitted by the light source 12 is reflected by the reflecting ring 20, then the light is reflected again on the inner wall of the box cover 1, then the light is emitted to the reflecting ring again, and then the light enters the photoelectric conversion device 6 after being reflected for multiple times; since the light irradiates on the moving object and the reflected light undergoes doppler shift, the light received by the photoelectric conversion device 6 has a different frequency from the light emitted by the light source 12; the frequency shift degree is related to the speed of the moving object, so the rotating speed of the large gear 5 influences the frequency of the light received by the photoelectric conversion device 6; the function of the light shielding plate 19 is to prevent further reflection of light so as not to form interference; the ultrasonic wave emitted by the ultrasonic generator 4 acts on the acousto-optic device 3, so that the acousto-optic device 3 plays a grating role, and the light transmission frequency and the light transmission of the acousto-optic device 3 can be controlled by controlling the frequency or the on-off of the ultrasonic wave emitted by the ultrasonic generator 4; the light source 12 can rotate around the rotating shaft 13 within a certain range, so that the change of the incident angle of the light on the reflecting ring 20 changes the reflecting times of the light between the reflecting ring and the box cover, and the change of the reflecting times directly influences the frequency shift of the light incident to the photoelectric conversion device.
The pointer 21 and the scale 22 are used for calibrating the rotation angle of the rotating shaft 13.
The stand 14 is fixed to the case 16, and the rotary shaft 13 is connected to the stand 14. The cover 1 is positioned on the box 16 by pins 15 and connected by screws.
One end of the control line 7 is connected with the ultrasonic generator 4, and the other end is connected with the controller 9 and used for controlling the characteristic parameters of the ultrasonic wave; the signal line 8 is used for transmitting information received by the photoelectric conversion device 6 to the controller 9; one end of the control line 17 is connected with the servo motor 18, and the other end is connected with the controller 9 and used for controlling the rotating speed of the servo motor 18.
The light emitted by the light source 12 enters the photoelectric conversion device 6 through the light splitter 11 and the optical fiber 10, and then enters the controller 9 after being changed into an electric signal, the controller 9 processes the signal according to a set coding rule to form a first password, the other path of light with frequency shift enters the photoelectric conversion device 6, and then enters the controller 9 after being changed into the electric signal, the controller 9 processes the signal according to the set coding rule to form another path of matched verification code, the two paths of passwords are used for encrypting data, the matched verification code is automatically generated by an instrument and is influenced by the rotating speed, the angle and the ultrasonic frequency, the setting of the rotating speed, the angle and the ultrasonic frequency can be adjusted according to the date, the place or a specific rule, and can also be circularly changed according to the specific rule, because the parameters and the rule are predetermined by a sender and a decryption party, the device does not pass through a network channel, and the instrument is not owned by a third party, so that the safety is enhanced.
The first password generated through a series of processing procedures according to parameters such as rotating speed, angle, ultrasonic frequency and the like is shared by a sender and a decryptor, corresponding information generated through the technical device is a background verification code, and is automatically encrypted for the ciphertext according to a certain rule without knowing, under the condition that the first password and the corresponding verification code do not pass authentication, the ciphertext is read, the logic bomb embedded in the ciphertext is activated, and the ciphertext is destroyed.
The activation of the device of the present technology requires the reading of the biological characteristics, so that it can only be used by a specific individual, avoiding theft.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (8)
1. An acousto-optic coupled frequency shift encryption apparatus, comprising: the device comprises a box cover (1), a pinion (2), an acousto-optic device (3), an ultrasonic generator (4), a gearwheel (5), a photoelectric conversion device (6), a first control line (7), a signal line (8), a controller (9), an optical fiber (10), a light splitter (11), a light source (12), a rotating shaft (13), a rack (14), a pin (15), a box body (16), a second control line (17), a servo motor (18), a light shielding plate (19), a light reflecting ring (20), a pointer (21) and scales (22);
the servo motor (18) drives the small gear (2) to rotate, the small gear (2) is meshed with the large gear (5), then the small gear (2) drives the large gear (5) to rotate, light emitted by the light source (12) is reflected by the reflection ring (20), the light is reflected on the inner wall of the box cover (1) again, then the light is emitted onto the reflection ring again, and then the light enters the photoelectric conversion device (6) after being reflected for multiple times; because the light irradiates on the moving object, the reflected light generates Doppler frequency shift, so that the frequency of the light received by the photoelectric conversion device (6) is different from that of the light emitted by the light source (12); the frequency shift degree is related to the speed of a moving object, so the rotating speed of the large gear (5) influences the light frequency received by the photoelectric conversion device (6);
the ultrasonic wave emitted by the ultrasonic generator (4) acts on the acousto-optic device (3) to enable the acousto-optic device (3) to play a grating role, and the light transmission frequency and the light transmission of the acousto-optic device (3) can be controlled by controlling the frequency or the on-off state of the ultrasonic wave emitted by the ultrasonic generator (4);
light emitted by a light source (12) enters a photoelectric conversion device (6) through a light splitter (11) and an optical fiber (10) and then enters a controller (9) after becoming an electric signal, the controller (9) processes the signal according to a set coding rule to form a password, the other path of light after frequency shift enters the photoelectric conversion device (6) and then enters the controller (9) after becoming the electric signal, the controller (9) processes the signal according to the set coding rule to form another matched verification code, and the two passwords are used for encrypting data.
2. The acousto-optic coupling frequency shift encryption device according to claim 1, characterized in that the small gear (2) is fixedly connected with a servo motor (18) and is arranged in the box body (16) together with the large gear (5); the ultrasonic generator (4) is arranged on the box cover (1), the acousto-optic device (3) is fixedly connected with the ultrasonic generator (4) and has a certain gap with the end face of the big gear (5).
3. An acousto-optic coupled frequency shift encryption device according to claim 2, characterised in that the light blocking plate (19) is adapted to block further reflections of light rays from interfering.
4. The acousto-optic coupled frequency shift encryption apparatus according to claim 3, wherein the light source (12) is configured to rotate around the rotation shaft (13) within a certain range, so that the change of the incident angle of the light on the reflective ring (20) causes the change of the reflection number of the light between the reflective ring and the case cover, and the change of the reflection number directly affects the magnitude of the frequency shift of the light incident to the photoelectric conversion device.
5. An acousto-optic coupled frequency shift encryption device according to claim 4, characterized in that the pointer (21) and the scale (22) are used for calibrating the rotation angle of the rotating shaft (13).
6. An acousto-optic coupled frequency shift encryption apparatus according to claim 5, characterised in that the stage (14) is fixed to the housing (16), and the rotary shaft (13) is connected to the stage (14); the box cover (1) is positioned on the box body (16) by a pin (15) and connected by a screw.
7. The acousto-optic coupled frequency-shift encryption device of claim 6,
one end of a first control line (7) is connected with the ultrasonic generator (4), and the other end is connected with the controller (9) and used for controlling the characteristic parameters of ultrasonic waves; the signal wire (8) is used for transmitting the information received by the photoelectric conversion device (6) to the controller (9); one end of the second control line (17) is connected with the servo motor (18), and the other end of the second control line is connected with the controller (9) and used for controlling the rotating speed of the servo motor (18).
8. The acousto-optic coupling frequency shift encryption device according to claim 7, wherein since the matched verification code is automatically generated by an instrument and is influenced by the rotation speed, angle and ultrasonic frequency, and the setting of the rotation speed, angle and ultrasonic frequency can be changed cyclically according to a specific rule, since these parameters and rules are agreed by the sender and the decrypter in advance, and do not pass through a network channel, and the instrument is not owned by a third party, the security is enhanced.
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| CN201711274312.1A CN108111231B (en) | 2017-12-06 | 2017-12-06 | Acousto-optic coupling frequency shift encryption device |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011083476A1 (en) * | 2010-01-07 | 2011-07-14 | Shilat Optronics Ltd | Three dimensional measurement system |
| CN102244334A (en) * | 2011-02-21 | 2011-11-16 | 深圳大学 | Broadband tuning terahertz wave generator based on ultrasonic grating frequency shift and cyclic frequency shift |
| CN105043527A (en) * | 2015-07-06 | 2015-11-11 | 江苏安智光电科技有限公司 | Pulse laser heterodyne doppler vibration measuring structure |
| CN105809115A (en) * | 2016-03-02 | 2016-07-27 | 上海师范大学 | Binary channel multiple fingerprints optical encryption method |
-
2017
- 2017-12-06 CN CN201711274312.1A patent/CN108111231B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011083476A1 (en) * | 2010-01-07 | 2011-07-14 | Shilat Optronics Ltd | Three dimensional measurement system |
| CN102244334A (en) * | 2011-02-21 | 2011-11-16 | 深圳大学 | Broadband tuning terahertz wave generator based on ultrasonic grating frequency shift and cyclic frequency shift |
| CN105043527A (en) * | 2015-07-06 | 2015-11-11 | 江苏安智光电科技有限公司 | Pulse laser heterodyne doppler vibration measuring structure |
| CN105809115A (en) * | 2016-03-02 | 2016-07-27 | 上海师范大学 | Binary channel multiple fingerprints optical encryption method |
Non-Patent Citations (2)
| Title |
|---|
| 可实现连续激光-脉冲转换的全光纤声光耦合环形谐振腔;程凯等;《中国激光》;20030430;第30卷(第4期);第325-328页 * |
| 基于差频原理的声光移频器;朱吉等;《压电与声光》;20140831;第36卷(第4期);第535-537页 * |
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