CN107835049A - A kind of laser communication method - Google Patents
A kind of laser communication method Download PDFInfo
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- CN107835049A CN107835049A CN201711099660.XA CN201711099660A CN107835049A CN 107835049 A CN107835049 A CN 107835049A CN 201711099660 A CN201711099660 A CN 201711099660A CN 107835049 A CN107835049 A CN 107835049A
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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
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
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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
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
- H04B10/505—Laser transmitters using external modulation
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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
- H04B10/5161—Combination of different modulation schemes
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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
- H04B10/524—Pulse modulation
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- Computer Networks & Wireless Communication (AREA)
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- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The present invention relates to a kind of laser communication method, it is characterized in that:Laser communication position coding is that it is digital that the bits of coded continuously exported by laser form communication by adjusting laser pulse width in laser output or laser pulse amplitude or laser pulse width and laser pulse amplitude defines a bits of coded in communication.The present invention completes the communication definitions of one digit number by then passing through laser pulse width, laser pulse amplitude and laser pulse width and laser pulse amplitude three, realizes that laser digital communicates by laser pulse width or/and laser pulse amplitude or/and laser pulse amplitude and laser pulse width.The communication definitions one that one digit number is completed by laser pulse width, laser pulse amplitude, laser pulse amplitude and laser pulse width three are 0 F any numbers therein.Namely one can represent the 0 any number for arriving F, and the speed or reliability of this laser communication made are greatly improved or strengthened.
Description
Technical field
The present invention relates to a kind of communication means, particularly a kind of laser communication method.
Background technology
The amplitude system that traditional space optical communication system uses, there is pulse（Or high energy pulse）1 is represented, no pulse
（Or low energy pulses）Represent 0.Under this system, the bit rate of communication system depends on the pulse frequency of laser, pulse
Frequency is higher, and bit rate is then higher.For remote lasercom, it is necessary to using Q-switch laser as carrier.And Gao Chong
The Q-switched laser of complex frequency generally only hundreds of KHz repetition rates, this and atmospheric optical communication several million are to hundreds of megahertzs
Communication requirement differs greatly.According to pulse-width tunable laser, then different binary systems can be represented using different pulsewidths
Coding, a laser pulse can replace several light pulses under amplitude system, then, constant in laser repetition rate
Under the conditions of, the bit rate of channel can be improved exponentially at double.
There is the technology that literature research is optimized and controlled to pulse shape in pulse laser both at home and abroad, but not
The real-time tuning of pulse-width can be realized.Here is the more representational research both at home and abroad being controlled to impulse waveform
Report.
2006, Matthew Royal of Pennsylvania State University et al., which are reported, utilized liquid crystal spatial light modulation
Device realizes the method that any femtosecond pulse realizes waveform control.The optical system of use is a 4F zero dispersion pulse shortener,
It is placed on spatial light modulator as template among two spherical reflectors, adjusts the phase for the frequency content being spatially separating and shake
Width, can be by frequency spectral encoding to the template of Pulse of Arbitrary waveform, so, through extra pulse by controlling each pixel cell
The pulse recombined after orthopedic systems just has close to desired impulse waveform.
2009, Stefan M. Weber of University of Geneva et al. report realized broadband using linear micro mirror array
Femtosecond pulse shaping.The array belongs to MEMS, can postpone or weaken certain laser frequency composition, can be ultraviolet to red
Phase and Modulation and Amplitude Modulation are realized in outer scope, so as to realize waveform control.
2010, the Xu Baozhong of University Of Tianjin described shaped pulse YAG laser skills in detail in his thesis for the doctorate
Art, shaped pulse refer to that the impulse waveform of laser can pre-set the technology of shape according to software.Shaped pulse system is adopted
It is that voltage controller outer shroud devises benefit according to the transmission function of equivalent power level with peak point current double-loop feedbackc technology
Repay network；Using ARM microprocessors as control core, shaped pulse laser control system is devised, completes shaped pulse volume
Collect and driving designs, realize the output of shaped pulse laser.
2011, D.S. Moore of U.S. Lip river Sa Lamosi National Laboratories et al. reported the optimization to laser pulse
Shaping technique.Shaping pulse is shaken by placing a programmable phase on the Fourior plane at zero dispersion stretcher center
What width template was realized.Template can be spatial light modulator or acousto-optic modulator.
2014, Maria Michalska of Polish photoelectricity research institute of military technology university et al. were reported in er-doped light
The possibility and limiting factor of Pulse of Arbitrary waveform are realized in fiber amplifier.Using arbitrary-function generator to narrow-linewidth laser two
Pole pipe carries out direct current modulation, and amplifier input pulse waveform is suitably corrected by programming, can obtain nanosecond
Pulse of Arbitrary waveform, key constraints are stimulated Brillouin scatterings.
2014, Pornsak Srisungsitthisunti of northern Bangkok Xian Huang technical colleges et al. reported a kind of profit
The control technology of sub-micron ripple is produced on titanium and silicon with the controllable femto-second laser of waveform.Experiment ti∶sapphire laser femto-second laser
Wavelength 800nm, repetition 1kHz, pulsewidth 160fs, its repetitive rate and pulse train number can be controlled by general gram of box pulse selector.
Laser beam is sent into the spatial light modulator in 4F structures after dispersion, passes through programmable spectrum phase-modulation and frequency Fourier
Filtering technique adjusts the time waveform of light beam.Pulse duration can change in 1ps between 5ps.
2015, David S. WU of Southampton, Britain university et al. reported a kind of high repetitive frequency pulsed light
Learn Fourier's synthetic technology.Using the synthesis of the multi signal of the different wave length of various lasers output, random waveform can be produced
Signal.
The universal deficiency of these work is, although appropriate pulse shape can be set as needed, not in advance
The real-time tuning of pulse-width can be realized.
The content of the invention
It is big to be realized within the limited laser communication pulse spacing it is an object of the invention to provide a kind of laser communication method
Volume communications.
The object of the present invention is achieved like this, a kind of laser communication method, it is characterized in that:Laser communication position coding is logical
The laser pulse width crossed in adjustment laser output adjusts laser pulse width and laser pulse amplitude defines a bits of coded in communication simultaneously,
The bits of coded continuously exported by laser forms laser digital communication.
Described bits of coded is 0-9 any numbers therein.
Described bits of coded is 0-15 any numbers therein.
Realize that laser digital communication includes start bit, coding defines position and digital communication position.
Described laser digital communication is point-to-point laser communication.
The laser of described point-to-point laser communication is the Q-switched laser of adjustable pulse width and laser pulse amplitude.
Described bits of coded is that 0-9 any numbers therein are that as defined as follows, first exports without laser after sync bit
0 is represented, the laser pulse of shortest time represents 1, represents 2 between maximum duration width-pulse and minimum time width pulse, most
It is the change that a umber of pulse word bit is realized by laser pulse width modulation that long-time width-pulse, which represents 3,0 to 3,；Minimum pulse amplitude and
Minimum pulse width represents 4, minimum pulse amplitude and represents 5 between maximum duration width-pulse and minimum time width pulse, minimum pulse amplitude
6 are represented with maximum pulse width, and minimum pulse width and time pulse amplitude represent 7, and secondary pulsewidth and time pulse amplitude represent 8, maximum pulse width and time pulse amplitude generation
Table 9.
Described bits of coded is that 0-15 any numbers therein are that as defined as follows, there is 20 bit data types after sync bit
Position, the laser pulse of shortest time represent 1,2, when most long are represented between maximum duration width-pulse and minimum time width pulse
Between width-pulse to represent 3,0 to 3 be the change that a umber of pulse word bit is realized by laser pulse width modulation.Minimum pulse amplitude and minimum
Pulsewidth represents 4, minimum pulse amplitude and represents 5 between maximum duration width-pulse and minimum time width pulse, minimum pulse amplitude and most
Big pulsewidth represents 6, and minimum pulse width and time pulse amplitude represent 7, and secondary pulsewidth and time pulse amplitude represent 8, and maximum pulse width and time pulse amplitude represent 9.
Minimum pulse amplitude and minimum time width and secondary small pulse amplitude and minimum time width represent A, minimum pulse amplitude and time small time width and
Secondary small pulse amplitude and time small time width represent B, and minimum pulse amplitude and maximum time width are superimposed minimum pulse amplitude and minimum time width
Represent C, secondary small pulse amplitude and minimum time width and maximum pulse amplitude and minimum time width represents D, secondary small pulse amplitude and time small time
Width and maximum pulse amplitude and minimum time width represent E, and two maximum pulse amplitudes and minimum time width represent F.
It is an advantage of the invention that completed by then passing through laser pulse width, laser pulse amplitude and laser pulse width and laser pulse amplitude three
The communication definitions of one digit number, realize that laser digital leads to by laser pulse width or/and laser pulse amplitude or/and laser pulse amplitude and laser pulse width
Letter.The communication definitions one that one digit number is completed by laser pulse width, laser pulse amplitude, laser pulse amplitude and laser pulse width three are 0-F
Any number therein.Namely one can represent the 0 any number for arriving F, and the speed or reliability of this laser communication made are significantly
Improve or strengthen.
Brief description of the drawings
With reference to embodiment accompanying drawing, the invention will be further described:
Fig. 1 is to realize a kind of code pattern of embodiment 2 of laser communication method of the present invention；
Fig. 2 is a kind of laser communication method coding schematic diagram；
Fig. 3 is to realize a kind of code pattern of embodiment 3 of laser communication method of the present invention.
Embodiment
Embodiment 1
A kind of laser communication method, laser communication position coding are swashed by adjusting the laser pulse width in laser output or adjusting simultaneously
Light pulsewidth and laser pulse amplitude define a bits of coded in communication, and the bits of coded continuously exported by laser forms laser digital and led to
Letter.
Described bits of coded is 0-9 any numbers therein.
Described bits of coded is 0-15 any numbers therein.
Realize that laser digital communication includes start bit, coding defines position and digital communication position.
Described laser digital communication is point-to-point laser communication.
The laser of described point-to-point laser communication is the Q-switched laser of adjustable pulse width and laser pulse amplitude.
Embodiment 2
As shown in figure 1, provide one be any number between 0 or 9 by pattern, in Fig. 1, first nothing behind two bit synchronization positions
Laser output represents 0, and the laser pulse of shortest time represents 1, between maximum duration width-pulse and minimum time width pulse
2 are represented, it is the change that a umber of pulse word bit is realized by laser pulse width modulation that maximum duration width-pulse, which represents 3,0 to 3,.Most
Small pulse amplitude and minimum pulse width represent 4, minimum pulse amplitude and represent 5 between maximum duration width-pulse and minimum time width pulse,
Minimum pulse amplitude and maximum pulse width represent 6, and minimum pulse width and time pulse amplitude represent 7, and secondary pulsewidth and time pulse amplitude represent 8, maximum pulse width and
Secondary pulse amplitude represents 9.
Actually define one digit number by pulsewidth and pulse amplitude to define as needed, above-mentioned definition can at most provide C10 10
=3628800 kinds of defining modes.
As shown in Figure 2, this defining mode can be that the 8 digit pulse numbers after sync bit provide.It can thus realize
The encryption of communication.The position that described above pulsewidth and time pulse amplitude represent 8 can be defined as 0, represent 0 exported without laser and represent
9 can be represented.
Embodiment 3
As shown in figure 3, provide one be 0 or to any number between F by pattern, have 20 data class behind two bit synchronization positions
Type position, the laser pulse of shortest time represent 1, and 2 are represented between maximum duration width-pulse and minimum time width pulse, most long
It is the change that a umber of pulse word bit is realized by laser pulse width modulation that time width pulse, which represents 3,0 to 3,.Minimum pulse amplitude and most
Small pulsewidth represents 4, minimum pulse amplitude and represents 5 between maximum duration width-pulse and minimum time width pulse, minimum pulse amplitude and
Maximum pulse width represents 6, and minimum pulse width and time pulse amplitude represent 7, and secondary pulsewidth and time pulse amplitude represent 8, and maximum pulse width and time pulse amplitude represent
9.Minimum pulse amplitude and minimum time width and secondary small pulse amplitude and minimum time width represent A, minimum pulse amplitude and time small time width
And secondary small pulse amplitude and time small time width represent B, it is wide that minimum pulse amplitude and maximum time width are superimposed minimum pulse amplitude and minimum time
Degree represents C, secondary small pulse amplitude and minimum time width and maximum pulse amplitude and minimum time width represents D, secondary small pulse amplitude and time hour
Between width and maximum pulse amplitude and minimum time width represent E, two maximum pulse amplitudes and minimum time width represent F.
Embodiment 3 uses the change of pulse amplitude and breadth a pulse position, realizes the coding of A-F positions.
Embodiment 3 can at most provide C16 16Kind defining mode.
Any communication pattern under laser hardware condition, this hair may be realized actually by the method for the present invention
It is bright to only give two kinds of embodiments and just hope that the way of thinking of the explanation present invention is entirely capable of improving the speed or reliable of laser communication
Property is greatly improved or strengthened.
The part and the well-known components and common structure of the method category industry or conventional hand that the present embodiment does not describe in detail
Section, is not described one by one here.
Claims (8)
1. a kind of laser communication method, it is characterized in that:Laser communication position coding is by adjusting the laser pulse width in laser output
Or adjusting laser pulse width simultaneously and laser pulse amplitude defines a bits of coded in communication, the bits of coded continuously exported by laser forms
Laser digital communicates.
2. a kind of laser communication method according to claim 1, it is characterized in that:Described bits of coded is therein of 0-9
What number.
3. a kind of laser communication method according to claim 1, it is characterized in that:Described bits of coded is therein of 0-15
What number.
4. a kind of laser communication method according to claim 1, it is characterized in that:Realize that laser digital communication includes starting
Position, coding define position and digital communication position.
5. a kind of laser communication method according to claim 1, it is characterized in that:Described laser digital communication is point-to-point
Laser communication.
6. a kind of laser communication method according to claim 5, it is characterized in that:Described point-to-point laser communication swashs
Light device is the Q-switched laser of adjustable pulse width and laser pulse amplitude.
7. a kind of laser communication method according to claim 2, it is characterized in that:Described bits of coded is therein of 0-9
What number is that as defined as follows, first represents 0 without laser output after sync bit, and the laser pulse of shortest time represents 1, between
Maximum duration width-pulse and minimum time width pulse represent 2, and it is to pass through laser that maximum duration width-pulse, which represents 3,0 to 3,
The change of a umber of pulse word bit is realized in pulsewidth modulation；Minimum pulse amplitude and minimum pulse width represent 4, minimum pulse amplitude and between it is most long when
Between width-pulse and minimum time width pulse represent 5, minimum pulse amplitude and maximum pulse width represent 6, minimum pulse width and time pulse amplitude generation
Table 7, secondary pulsewidth and time pulse amplitude represent 8, and maximum pulse width and time pulse amplitude represent 9.
8. a kind of laser communication method according to claim 3, it is characterized in that:Described bits of coded is therein of 0-15
What number is that as defined as follows, have 20 bit data type positions after sync bit, the laser pulse of shortest time represents 1, between most long
Time width pulse and minimum time width pulse represent 2, and it is to pass through laser pulse width that maximum duration width-pulse, which represents 3,0 to 3,
The change of a umber of pulse word bit is realized in modulation；
Minimum pulse amplitude and minimum pulse width represent 4, minimum pulse amplitude and between maximum duration width-pulse and minimum time width pulse
5 are represented, minimum pulse amplitude and maximum pulse width represent 6, and minimum pulse width and time pulse amplitude represent 7, and secondary pulsewidth and time pulse amplitude represent 8, maximum
Pulsewidth and time pulse amplitude represent 9；Minimum pulse amplitude and minimum time width and secondary small pulse amplitude and minimum time width represent A, most scun
Width and time small time width and secondary small pulse amplitude and time small time width represent B, and minimum pulse amplitude and the superposition of maximum time width are minimum
Pulse amplitude and minimum time width represent C, secondary small pulse amplitude and minimum time width and maximum pulse amplitude and minimum time width represents D,
Secondary small pulse amplitude and time small time width and maximum pulse amplitude and minimum time width represent E, and two maximum pulse amplitudes and minimum time are wide
Degree represents F.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008206086A (en) * | 2007-02-22 | 2008-09-04 | Matsushita Electric Works Ltd | Visible optical communication system |
| CN102135698A (en) * | 2011-03-15 | 2011-07-27 | 中国工程物理研究院激光聚变研究中心 | Transmission-type all-optical fiber light pulse coder |
| CN102638271A (en) * | 2012-04-18 | 2012-08-15 | 重庆邮电大学 | High repetition frequency jamming-resistant laser encoding system and laser encoding method |
| CN105897644A (en) * | 2016-03-09 | 2016-08-24 | 西南石油大学 | Communication method capable of realizing pulse width and frequency simultaneous modulation |
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2017
- 2017-11-09 CN CN201711099660.XA patent/CN107835049B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008206086A (en) * | 2007-02-22 | 2008-09-04 | Matsushita Electric Works Ltd | Visible optical communication system |
| CN102135698A (en) * | 2011-03-15 | 2011-07-27 | 中国工程物理研究院激光聚变研究中心 | Transmission-type all-optical fiber light pulse coder |
| CN102638271A (en) * | 2012-04-18 | 2012-08-15 | 重庆邮电大学 | High repetition frequency jamming-resistant laser encoding system and laser encoding method |
| CN105897644A (en) * | 2016-03-09 | 2016-08-24 | 西南石油大学 | Communication method capable of realizing pulse width and frequency simultaneous modulation |
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