CN115242303B - Device and method for controlling coupling efficiency of space light to single-mode optical fiber - Google Patents
Device and method for controlling coupling efficiency of space light to single-mode optical fiber Download PDFInfo
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- CN115242303B CN115242303B CN202211146703.6A CN202211146703A CN115242303B CN 115242303 B CN115242303 B CN 115242303B CN 202211146703 A CN202211146703 A CN 202211146703A CN 115242303 B CN115242303 B CN 115242303B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4214—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element having redirecting reflective means, e.g. mirrors, prisms for deflecting the radiation from horizontal to down- or upward direction toward a device
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4296—Coupling light guides with opto-electronic elements coupling with sources of high radiant energy, e.g. high power lasers, high temperature light sources
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- 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
- H04B10/25—Arrangements specific to fibre transmission
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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Abstract
A device and a method for controlling coupling efficiency of space light to single-mode optical fiber belong to the technical field of optical communication, and solve the problem that the technical requirement of efficient coupling of the space light to the single-mode optical fiber cannot be met due to the fact that a technical scheme for enabling the coupling efficiency of the space light to the single-mode optical fiber to reach an extreme value all the time is lacked in the prior art. The laser is connected with the modulator in an image manner; the modulator image is connected with a Cassegrain optical antenna through a space laser link; the Cassegrain optical antenna is connected with the beam splitting prism; one end of the beam splitting prism is connected with the Hartmann sensor, and the other end of the beam splitting prism is connected with the liquid crystal light modulator; the Hartmann sensor is connected with the data processor; the data processor is connected with the liquid crystal light modulator; the liquid crystal optical modulator is connected with the digital demodulation through a single mode fiber; the digital demodulator is connected with the data processor.
Description
Technical Field
The invention relates to the technical field of optical communication, in particular to a device and a method for controlling coupling efficiency of space light to a single-mode optical fiber.
Background
Space optical communication can be divided into an intensity modulation/direct detection (IM/DD) mode and a phase modulation/coherent detection mode from a signal modulation mode and a demodulation mode, and the coherent detection becomes a research hotspot in recent years due to the characteristics of high detection sensitivity, large information capacity, good wavelength selectivity, various modulation formats and the like. Coherent optical communication can be divided into digital coherent communication and analog coherent communication from a signal processing mode, digital coherent system technology and devices are mature, optical wavelength division multiplexing, optical amplification technology and optical phase modulation technology are widely applied to optical fiber communication, the mature optical fiber communication technology is directly applied to space communication, and the technical problem of low optical fiber coupling efficiency is faced.
The atmospheric turbulence in an atmospheric channel is a key factor for restricting the improvement of the coupling efficiency, the single-mode coupling efficiency can be improved by the existing methods of self-adaptive optics, optical fiber coherent array receiving, changing the focal length of a coupling system and the like, but the key factor of mode matching is not considered in the coupling efficiency. According to the literature, the light spot far-field distribution form is changed through the liquid crystal light modulator, so that the light spot size and the light spot mode are always the same as those of a single-mode fiber, namely the light spot diameter is the same as the core diameter of the single-mode fiber, and the light spot mode is a Gaussian mode, but no technical scheme for enabling the coupling efficiency of the single-mode fiber to reach an extreme value is reported.
Disclosure of Invention
The invention solves the problem that the technical requirement of efficient coupling of space light to single-mode light cannot be met due to the lack of a technical scheme for enabling the coupling efficiency of the space light to the single-mode optical fiber to always reach an extreme value in the prior art.
The invention relates to a device for controlling the coupling efficiency of space light to a single-mode optical fiber, which comprises a laser, a modulator, a Cassegrain optical antenna, a beam splitter prism, a Hartmann sensor, a data processor, a single-mode optical fiber, a digital demodulator and a liquid crystal light modulator;
the laser is connected with the modulator;
the modulator is connected with the Cassegrain optical antenna through a space laser link;
the Cassegrain optical antenna is connected with the beam splitting prism;
one end of the beam splitting prism is connected with the Hartmann sensor, and the other end of the beam splitting prism is connected with the liquid crystal light modulator;
the Hartmann sensor is connected with the data processor;
the data processor is connected with the liquid crystal light modulator;
the liquid crystal optical modulator is connected with the digital demodulation through a single mode fiber;
the digital demodulator is connected with the data processor.
The method for controlling the coupling efficiency of the space light to the single-mode optical fiber is realized by adopting the device for controlling the coupling efficiency of the space light to the single-mode optical fiber, and comprises the following steps:
s1, a laser sends laser to a modulator, the modulator modulates information to be transmitted to the received laser, and the modulator sends the modulated laser to a Cassegrain optical antenna;
s2, the Cassegrain optical antenna sends the received laser to a beam splitter prism, the beam splitter prism divides the received laser into two paths of optical signals, one path of optical signal is sent to a Hartmann sensor, and the other path of optical signal is sent to a liquid crystal optical modulator;
s3, the Hartmann sensor sends the received optical signals to a data processor, the data processor analyzes the received optical signals to generate a kinoform, the data processor sends the kinoform to the liquid crystal optical modulator to drive the liquid crystal optical modulator, and the optical signals sent by the liquid crystal optical modulator are all coupled into a single mode optical fiber;
and S4, the single-mode optical fiber sends the coupled optical signal to a digital demodulator, the digital demodulator demodulates the received optical signal and sends the demodulated optical signal to a data processor, and the data processor converts the optical signal into an electric signal so as to obtain the transmitted information.
Further, in one embodiment of the present invention, the optical signal includes a phase of the optical signal and an intensity spatial distribution form of the optical signal.
Further, in an embodiment of the present invention, all optical signals sent by the liquid crystal optical modulator are coupled into a single-mode optical fiber, specifically:
the kinoform keeps the optical signal sent out by the liquid crystal optical modulator in a Gaussian mode at the single-mode optical fiber, and the Gaussian mode is the same as the mode of the single-mode optical fiber, so that the liquid crystal optical modulator completely couples the optical signal into the single-mode optical fiber.
The invention discloses a system for controlling coupling efficiency of space light to a single-mode optical fiber, which comprises the following components:
the modulation module is used for sending laser to the modulator by the laser, modulating the information to be transmitted to the received laser by the modulator, and sending the modulated laser to the Cassegrain optical antenna by the modulator;
the system comprises a light splitting module, a Cassegrain optical antenna, a liquid crystal light modulator and a liquid crystal optical modulator, wherein the Cassegrain optical antenna sends received laser to the light splitting prism, the light splitting prism divides the received laser into two paths of optical signals, one path of optical signal is sent to the Hartmann sensor, and the other path of optical signal is sent to the liquid crystal light modulator;
the driving module is used for sending the received optical signals to the data processor by the Hartmann sensor, the data processor analyzes the received optical signals to generate a kinoform, the data processor sends the kinoform to the liquid crystal optical modulator to drive the liquid crystal optical modulator, and the optical signals sent by the liquid crystal optical modulator are all coupled into a single-mode optical fiber;
and the single-mode optical fiber sends the coupled optical signal to the digital demodulator, the digital demodulator demodulates the received optical signal and sends the demodulated optical signal to the data processor, and the data processor converts the optical signal into an electric signal so as to obtain the transmitted information.
The invention relates to electronic equipment which comprises a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for finishing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any of the above methods when executing the program stored in the memory.
A computer-readable storage medium according to the present invention, in which a computer program is stored which, when being executed by a processor, carries out the method steps of any of the above-mentioned methods.
The invention solves the problem that the technical requirement of efficient coupling of the space light to the single-mode light cannot be met due to the fact that the prior art lacks of a technical scheme which enables the coupling efficiency of the space light to the single-mode optical fiber to reach an extreme value all the time. The method has the following specific beneficial effects:
according to the device for controlling the coupling efficiency of the space light to the single-mode optical fiber, the output optical signal is kept to be the same as the mode of the single-mode optical fiber all the time through the liquid crystal optical modulator according to the change condition of the atmospheric turbulence, so that the coupling efficiency of the space light to the single-mode optical fiber always reaches an extreme value, the technical requirement of efficient coupling of the space light to the single-mode optical fiber is met, and the device can be widely applied to the technical field of optical communication.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart of a method for controlling coupling efficiency of spatial light to a single-mode optical fiber according to an embodiment;
in the figure, 1 is a laser, 2 is a modulator, 3 is a cassegrain optical antenna, 4 is a beam splitter prism, 5 is a hartmann sensor, 6 is a data processor, 7 is a single mode optical fiber, 8 is a digital demodulator, and 9 is a liquid crystal optical modulator.
Detailed Description
Various embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The embodiments described by referring to the drawings are exemplary and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The device for controlling the coupling efficiency of space light to a single-mode optical fiber comprises a laser 1, a modulator 2, a cassegrain optical antenna 3, a beam splitter prism 4, a Hartmann sensor 5, a data processor 6, a single-mode optical fiber 7, a digital demodulator 8 and a liquid crystal optical modulator 9;
the laser 1 is connected with the modulator 2;
the modulator 2 is connected with a Cassegrain optical antenna 3 through a space laser link;
the Cassegrain optical antenna 3 is connected with the beam splitter prism 4;
one end of the beam splitter prism 4 is connected with the Hartmann sensor 5, and the other end of the beam splitter prism is connected with the liquid crystal light modulator 9;
the Hartmann sensor 5 is connected with the data processor 6;
the data processor 6 is connected with the liquid crystal light modulator 9;
the liquid crystal optical modulator 9 is connected with the digital demodulator 8 through a single-mode optical fiber 7;
the digital demodulator 8 is connected to the data processor 6.
The method for controlling coupling efficiency of spatial light to a single-mode optical fiber according to this embodiment is implemented by using the apparatus for controlling coupling efficiency of spatial light to a single-mode optical fiber according to the foregoing embodiment, and includes the following steps:
step S1, a laser 1 sends laser to a modulator 2, the modulator 2 modulates information to be transmitted to the received laser, and the modulator 2 sends the modulated laser to a Cassegrain optical antenna 3;
s2, the Cassegrain optical antenna 3 sends the received laser to the beam splitter prism 4, the beam splitter prism 4 divides the received laser into two paths of optical signals, one path of optical signal is sent to the Hartmann sensor 5, and the other path of optical signal is sent to the liquid crystal optical modulator 9;
s3, the Hartmann sensor 5 sends the received optical signals to the data processor 6, the data processor 6 analyzes the received optical signals to generate a kinoform, the data processor 6 sends the kinoform to the liquid crystal optical modulator 9 to drive the liquid crystal optical modulator, and the optical signals sent by the liquid crystal optical modulator 9 are all coupled into the single-mode optical fiber 7;
and S4, the single-mode optical fiber 7 sends the coupled optical signal to the digital demodulator 8, the digital demodulator 8 demodulates the received optical signal and sends the demodulated optical signal to the data processor 6, and the data processor 6 converts the optical signal into an electric signal so as to obtain the transmitted information.
In this embodiment, the optical signal includes a phase of the optical signal and an intensity spatial distribution pattern of the optical signal.
In this embodiment, all optical signals sent by the liquid crystal optical modulator 9 are coupled into the single-mode optical fiber 7, specifically:
the kinoform maintains the optical signal transmitted through the liquid crystal optical modulator 9 in the gaussian optical mode in the single mode fiber 7, and the gaussian optical mode is the same as the mode of the single mode fiber 7, so that the liquid crystal optical modulator 9 couples all the optical signals into the single mode fiber 7.
The present embodiment is based on the method for controlling coupling efficiency of spatial light to a single-mode optical fiber according to the present invention, and can be better understood with reference to fig. 1, and provides an actual embodiment:
the laser 1 selects a wave band laser with the wavelength of 1550nm, the modulator 2 selects a phase type optical modulator, the optical ratio of the beam splitter prism 4 is 1:9, the unit number of the Hartmann sensor 5 is 64 units, and the core diameter of the single-mode optical fiber 7 is 10 microns;
the method comprises the following steps:
1) Laser emitted by the laser 1 enters the modulator 2, information to be transmitted is modulated onto the laser through the modulator 2, the laser passes through an atmospheric channel, and atmospheric turbulence affects transmission laser;
2) The laser is received by the Cassegrain optical antenna 3, the beam splitter prism 4 divides the received laser into two paths of optical signals, one path of optical signal is sent to the Hartmann sensor 5, and the other path of optical signal is sent to the surface of the liquid crystal optical modulator 9;
3) After the Hartmann sensor 5 obtains the phase and intensity spatial distribution form of the optical signal, the optical signal is analyzed through the data processor 6, a kinoform is generated according to the analysis result of the optical signal, the kinoform is used as a driving signal to drive the liquid crystal optical modulator 9, so that the optical signal emitted by the liquid crystal optical modulator 9 is kept in a Gaussian mode at the end face of the single-mode optical fiber 7, the Gaussian mode is the same as that of the single-mode optical fiber 7, the liquid crystal optical modulator 9 couples all the optical signals into the single-mode optical fiber 7, and the single-mode optical fiber 7 sends the coupled optical signals to the digital demodulator 8;
4) The digital demodulator 8 demodulates the received optical signal and sends the demodulated optical signal to the data processor 6 for processing and analysis, so as to obtain transmitted information;
the data processor 6 comprises a computer;
when the data processor 6 processes the optical signal sent by the digital demodulator 8 and determines that the received information efficiency is low, the data processor 6 sends the signal to the liquid crystal optical modulator 9, and the liquid crystal optical modulator 9 adjusts the received optical signal again and sends the optical signal to the data processor 6 through the single-mode optical fiber 7 and the digital demodulator 8, so that the coupling efficiency from the spatial light to the single-mode optical fiber always reaches an extreme value.
The extreme value of the coupling efficiency of the space light to the single-mode optical fiber in the atmospheric channel can be maintained at about 96% through the steps.
The system for controlling coupling efficiency of space light to a single-mode optical fiber according to this embodiment includes:
the modulation module is used for sending laser to the modulator 2 by the laser 1, and after the modulator 2 modulates information to be transmitted to the received laser, the modulator 2 sends the modulated laser to the Cassegrain optical antenna 3;
the optical splitting module is used for transmitting the received laser to the optical splitting prism 4 by the Cassegrain optical antenna 3, the optical splitting prism 4 splits the received laser into two paths of optical signals, one path of optical signal is transmitted to the Hartmann sensor 5, and the other path of optical signal is transmitted to the liquid crystal optical modulator 9;
the driving module is used for sending the received optical signals to the data processor 6 by the Hartmann sensor 5, the data processor 6 analyzes the received optical signals to generate a kinoform, the data processor 6 sends the kinoform to the liquid crystal optical modulator 9 to drive the liquid crystal optical modulator, and all the optical signals sent by the liquid crystal optical modulator 9 are coupled into the single-mode optical fiber 7;
and in the demodulation module, the single-mode optical fiber 7 sends the coupled optical signal to the digital demodulator 8, the digital demodulator 8 demodulates the received optical signal and sends the demodulated optical signal to the data processor 6, and the data processor 6 converts the optical signal into an electrical signal so as to obtain the transmitted information.
The electronic device according to this embodiment includes a processor, a communication interface, a memory, and a communication bus, where the processor and the communication interface communicate with each other through the communication bus by the memory;
a memory for storing a computer program;
a processor for implementing the method steps of any of the above embodiments when executing the program stored in the memory.
A computer-readable storage medium according to this embodiment, in which a computer program is stored, and the computer program, when executed by a processor, implements the method steps of any one of the above embodiments.
The memory in the embodiments of the present application may be either volatile memory or nonvolatile memory, or may include both volatile and nonvolatile memory. The non-volatile memory may be a Read Only Memory (ROM), a Programmable ROM (PROM), an Erasable PROM (EPROM), an electrically Erasable EPROM (EEPROM), or a flash memory. Volatile memory can be Random Access Memory (RAM), which acts as external cache memory. By way of example, and not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous Dynamic Random Access Memory (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), SLDRAM (synchronous DRAM), and direct rambus RAM (DR RAM). It should be noted that the memories of the methods described herein are intended to comprise, without being limited to, these and any other suitable types of memories.
In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, it may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the application to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted from one website, computer, server, or data center to another website, computer, server, or data center via wire (e.g., coaxial cable, fiber optic, digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., a floppy disk, a hard disk, a magnetic tape), an optical medium (e.g., a Digital Video Disk (DVD)), or a semiconductor medium (e.g., a Solid State Disk (SSD)), among others.
In implementation, the steps of the above method may be performed by instructions in the form of integrated logic circuits of hardware or software in a processor. The steps of a method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in a processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor. To avoid repetition, it is not described in detail here.
It should be noted that the processor in the embodiments of the present application may be an integrated circuit chip having signal processing capability. In implementation, the steps of the above method embodiments may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The processor described above may be a general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
The device and the method for controlling the coupling efficiency of space light to a single-mode optical fiber, which are provided by the present invention, are described in detail above, and the principle and the implementation manner of the present invention are explained in the present document by applying specific examples, and the description of the above embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (6)
1. The device for controlling the coupling efficiency of the space light to the single-mode optical fiber is characterized by comprising a laser (1), a modulator (2), a Cassegrain optical antenna (3), a beam splitter prism (4), a Hartmann sensor (5), a data processor (6), a single-mode optical fiber (7), a digital demodulator (8) and a liquid crystal optical modulator (9);
the laser (1) is connected with the modulator (2);
the modulator (2) is connected with the Cassegrain optical antenna (3) through a space laser link;
the Cassegrain optical antenna (3) is connected with the beam splitter prism (4);
one end of the beam splitting prism (4) is connected with the Hartmann sensor (5), and the other end of the beam splitting prism is connected with the liquid crystal light modulator (9);
the Hartmann sensor (5) is connected with the data processor (6);
the data processor (6) is connected with the liquid crystal light modulator (9);
the liquid crystal optical modulator (9) is connected with the digital demodulator (8) through a single-mode optical fiber (7);
the digital demodulator (8) is connected with the data processor (6);
all optical signals sent by the liquid crystal optical modulator (9) are coupled into a single-mode optical fiber (7), specifically:
the kinoform keeps the optical signal transmitted through the liquid crystal optical modulator (9) in a Gaussian optical mode in the single-mode optical fiber (7), and the Gaussian optical mode is the same as the mode of the single-mode optical fiber (7), so that the liquid crystal optical modulator (9) couples all the optical signals into the single-mode optical fiber (7).
2. A method for controlling coupling efficiency of spatial light to a single-mode optical fiber, the method being implemented by using the apparatus for controlling coupling efficiency of spatial light to a single-mode optical fiber according to claim 1, the method comprising the steps of:
s1, a laser (1) sends laser to a modulator (2), the modulator (2) modulates information to be transmitted to the received laser, and the modulator (2) sends the modulated laser to a Cassegrain optical antenna (3);
s2, the Cassegrain optical antenna (3) sends the received laser to the light splitting prism (4), the light splitting prism (4) splits the received laser into two paths of optical signals, one path of optical signal is sent to the Hartmann sensor (5), and the other path of optical signal is sent to the liquid crystal optical modulator (9);
s3, the Hartmann sensor (5) sends the received optical signals to the data processor (6), the data processor (6) analyzes the received optical signals and generates a kinoform, the data processor (6) sends the kinoform to the liquid crystal optical modulator (9) to drive the liquid crystal optical modulator, and then all the optical signals sent by the liquid crystal optical modulator (9) are coupled into the single-mode optical fiber (7);
s4, the single-mode optical fiber (7) sends the coupled optical signal to a digital demodulator (8), the digital demodulator (8) demodulates the received optical signal and sends the demodulated optical signal to a data processor (6), and the data processor (6) converts the optical signal into an electric signal so as to obtain transmitted information;
all optical signals sent by the liquid crystal optical modulator (9) are coupled into a single-mode optical fiber (7), specifically:
the kinoform keeps the optical signal transmitted through the liquid crystal optical modulator (9) in a gaussian mode at the single-mode fiber (7), and the gaussian mode is the same as the mode of the single-mode fiber (7), so that the liquid crystal optical modulator (9) couples all the optical signals into the single-mode fiber (7).
3. The method according to claim 2, wherein the optical signal comprises a phase of the optical signal and a spatial distribution of intensity of the optical signal.
4. A spatial light to single mode fiber coupling efficiency control system, the system comprising:
the laser is sent to the modulator (2) by the laser (1), and after the modulator (2) modulates information to be transmitted onto the received laser, the modulated laser is sent to the Cassegrain optical antenna (3) by the modulator (2);
the device comprises a light splitting module, a Cassegrain optical antenna (3) sends received laser to a light splitting prism (4), the light splitting prism (4) splits the received laser into two paths of optical signals, one path of optical signal is sent to a Hartmann sensor (5), and the other path of optical signal is sent to a liquid crystal optical modulator (9);
the driving module is used for sending the received optical signals to the data processor (6) by the Hartmann sensor (5), the data processor (6) analyzes the received optical signals and then generates a kinoform, the data processor (6) sends the kinoform to the liquid crystal optical modulator (9) to drive the liquid crystal optical modulator, and all the optical signals sent by the liquid crystal optical modulator (9) are coupled into the single-mode optical fiber (7);
the single-mode optical fiber (7) transmits the coupled optical signal to the digital demodulator (8), the digital demodulator (8) demodulates the received optical signal and transmits the demodulated optical signal to the data processor (6), and the data processor (6) converts the optical signal into an electric signal so as to obtain transmitted information;
all optical signals sent by the liquid crystal optical modulator (9) are coupled into a single-mode optical fiber (7), specifically:
the kinoform keeps the optical signal transmitted through the liquid crystal optical modulator (9) in a Gaussian optical mode in the single-mode optical fiber (7), and the Gaussian optical mode is the same as the mode of the single-mode optical fiber (7), so that the liquid crystal optical modulator (9) couples all the optical signals into the single-mode optical fiber (7).
5. An electronic device is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing mutual communication by the memory through the communication bus;
a memory for storing a computer program;
a processor for implementing the method steps of any one of claims 2 to 3 when executing a program stored in the memory.
6. A computer-readable storage medium, characterized in that a computer program is stored in the computer-readable storage medium, which computer program, when being executed by a processor, carries out the method steps of any one of the claims 2-3.
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| JP2007232833A (en) * | 2006-02-28 | 2007-09-13 | Pentax Corp | Optical communication module |
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