CN114826431A

CN114826431A - Laser transmission device

Info

Publication number: CN114826431A
Application number: CN202210745759.7A
Authority: CN
Inventors: 杜浩; 冯慧
Original assignee: Aerospace Information Research Institute of CAS
Current assignee: Aerospace Information Research Institute of CAS
Priority date: 2022-06-29
Filing date: 2022-06-29
Publication date: 2022-07-29
Anticipated expiration: 2042-06-29
Also published as: CN114826431B

Abstract

The invention provides a laser transmission device, relates to the technical field of wireless transmission, and can achieve the effect that laser can simultaneously transmit energy and information. The device comprises a transmitting end, wherein the transmitting end comprises a laser, an optical splitting component, a first modem and a light beam coupler; the light splitting component is used for splitting laser beams emitted by the laser to obtain a first light beam and a second light beam; the first modulator is used for loading preset information to the first light beam and outputting an information light beam carrying the preset information; the light beam coupler is used for coupling the information light beam with the second light beam and transmitting the coupled third light beam to the receiving end; the receiving end comprises an optical target surface and a second modem; the third light beam irradiates on the optical target surface, one part of the third light beam is absorbed by the optical target surface and converted into electric energy to supply power to the receiving end, and the other part of the third light beam passes through the optical target surface and is input to the second modem as an input light beam; and the second modem is used for analyzing preset information from the input optical beam.

Description

Laser transmission device

Technical Field

The invention relates to the technical field of wireless transmission, in particular to a laser transmission device.

Background

The development and progress of the wireless energy transmission technology provide an effective solution for the endurance of various aviation aircrafts. Remote wireless energy transmission can be achieved in two ways, one being microwave and the other being laser. Microwaves can pass through the inclement weather in the atmosphere, but their divergence is strong, resulting in a receiving antenna that is oversized and heavy. Compared with microwave wireless energy transmission, laser wireless energy transmission is rapid, charging directivity is good, monochromaticity is strong, and energy density is large, and can reach hundreds of times of microwave. Therefore, energy transmission by laser for an aircraft is a preferred option. The aircraft which usually adopts laser for energy transmission is additionally provided with wireless communication equipment, namely, the aircraft needs to be provided with laser charging equipment and wireless communication equipment at the same time, and the system is complicated.

Disclosure of Invention

The invention provides a laser transmission device which can achieve the effect that laser beams transmit energy and information simultaneously.

The present invention provides a laser transmission device, comprising:

the optical fiber coupler comprises a transmitting end, a receiving end and a control end, wherein the transmitting end comprises a laser, an optical splitting component, a first modem and an optical beam coupler;

the light splitting component is used for splitting laser beams emitted by the laser to obtain a first light beam and a second light beam; the first modulator is used for loading preset information to the first light beam and outputting an information light beam carrying the preset information; the beam coupler is used for coupling the information beam with the second beam and transmitting the coupled third beam to a receiving end;

the receiving end comprises an optical target surface and a second modem;

the third light beam irradiates the optical target surface, one part of the third light beam is absorbed by the optical target surface and converted into electric energy to supply power to the receiving end, and the other part of the third light beam passes through the optical target surface and is input to the second modem as an input light beam; the second modem is configured to parse the preset information from the input optical beam.

According to one embodiment of the invention, the optical target comprises a laser cell and a focusing lens; the laser battery is used for converting the incident third light beam into electric energy; the focusing lens is used for focusing a part of light beams from the third light beams to be used as input light beams and input the input light beams to the second modem.

According to an embodiment of the present invention, the transmitting end further includes an attenuator disposed in an exit direction of the first light beam, for attenuating the first light beam, and the attenuated first light beam is received by the first modem.

According to one embodiment of the present invention, the beam splitting assembly includes a first beam splitter and a second beam splitter; the first spectroscope set up in the emitting direction of laser instrument for with laser beam that the laser instrument sent divide into two way light beams, and light beam conduct all the way the second light beam input beam coupler, another way light beam process the second spectroscope is divided into two way light beams once more, and light beam input detecting instrument all the way, another way light beam conduct first light beam input first modem.

According to one embodiment of the invention, the laser beam emitted by the laser has a wave band of 770 to 820 nanometers; the first beam splitter can split light beams in a wavelength range of 770 to 785 nanometers to be used as first light beams, and light beams in other wavelength ranges are used as second light beams.

According to an embodiment of the present invention, the receiving end further includes a beacon light source for emitting beacon light, and the transmitting end determines the emission position of the third light beam by detecting the beacon light.

According to an embodiment of the present invention, the beacon light source is further configured to transmit an optical signal corresponding to the preset information analyzed by the second modem.

According to an embodiment of the present invention, the transmitting end further includes a collimating beam expander disposed in an exit direction of the beam coupler, and configured to collimate and transmit the third light beam output by the beam coupler.

According to one embodiment of the invention, the detection instrument comprises an optical power meter and an optical spectrum analyzer.

According to an embodiment of the present invention, the receiving end further includes a third spectroscope disposed between the focusing lens and the second modem;

and the third beam splitter is used for separating an information beam carrying information from the input beam and inputting the information beam to the second modem.

According to the laser transmission device provided by the invention, the device comprises a transmitting end and a receiving end. The transmitting end can divide the laser beam into two beams, load information on one beam, and then combine the two beams into one beam to be transmitted. After the receiving end receives the laser beam emitted by the emitting end, one part of the laser beam can be converted into electric energy to supply power, and the other part of the laser beam is modulated and demodulated to obtain information contained in the beam. The technical scheme can realize the effect that the same laser beam can transmit both energy and information, is favorable for simplifying wireless communication equipment and saves resources.

Drawings

In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed for the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a laser transmission device provided by the present invention;

FIG. 2 is a schematic view of the structure of an optical target in the laser delivery device provided by the present invention;

fig. 3 is a schematic diagram of a system architecture corresponding to the laser transmission apparatus provided in the present invention;

fig. 4 is a second schematic diagram of a system architecture corresponding to the laser transmission device provided by the present invention.

Reference numerals:

10: a transmitting end; 11: a laser; 12: a light splitting component; 121: a beam splitter; 122: a beam splitter; 123: detecting an instrument; 131: an attenuator; 132: a collimating beam expander; 13: a first modem; 14: a beam coupler; 141: a collimating beam expander; 15: a photodetector;

20: a receiving end; 21: an optical target surface; 211: a laser battery; 212: a focusing lens; 213: an energy storage battery; 23: a collimating mirror; 24: a beam splitter; 25: a beam splitter; 251: detecting an instrument; 26: a photodetector; 22: a second modem; 27: a beacon light source.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The block diagrams shown in the figures are functional entities only and do not necessarily correspond to physically separate entities. I.e. these functional entities may be implemented in the form of software, or in one or more hardware modules or integrated circuits, or in different networks and/or processor means and/or microcontroller means.

The flow charts shown in the drawings are merely illustrative and do not necessarily include all of the contents and operations/steps, nor do they necessarily have to be performed in the order described. For example, some operations/steps may be decomposed, and some operations/steps may be combined or partially combined, so that the actual execution sequence may be changed according to the actual situation.

In the present specification, the terms "first", "second", "third", and the like are used merely as labels, and are not intended to limit the number or order of the objects.

The laser transmission device of the present invention will be described below with reference to the accompanying drawings.

Fig. 1 shows a schematic structural diagram of a laser transmission device according to an embodiment of the present invention. As shown in fig. 1, the laser delivery apparatus may include a transmitting end 10 and a receiving end 20. The transmitting end 10 may include a laser 11, an optical splitting component 12, a first modem 13, and a beam coupler 14.

The laser 11 may be various types of lasers such as a semiconductor laser, a free electron laser, or the like. The laser may generate a laser beam of 770 nanometers (nm) to 820 nm.

The light splitting unit 12 is disposed along the emitting direction of the laser 11, and can be used to split the incident laser beam. The light splitting assembly 12 may be composed of a light splitter (i.e., a first light splitter) 121. The first beam splitter may be a polarizing beam splitter. The laser beam is split into two beams of light by the first beam splitter 121, i.e., a first beam and a second beam. The first light beam is a light beam to carry information, and thus a light beam of a wavelength band suitable for information transmission can be separated by the first beam splitter 121. For example, the first beam splitter 121 may split a 770nm to 785 nm wavelength band of the laser beam into a first beam and the remaining wavelength band of the laser beam into a second beam.

The monitoring of indexes such as power, wavelength, stability and the like of the laser beam is facilitated. The transmitting end 10 can split one light beam through the light splitting component 12, so as to measure indexes such as power and wavelength. Therefore, the beam splitting assembly 12 may include two beam splitters, i.e., a first beam splitter 121 and a second beam splitter 122. And the length of the light path can be changed by the two spectroscopes, which is beneficial to reducing the size of the device at the transmitting end.

The first beam splitter 121 is configured to split a first beam used for loading preset information from the laser beam, and the second beam splitter 122 may split the first beam again to obtain two beams. The second beam splitter 122 can split the first light beam into two identical light beams, wherein one of the two light beams can be input to the detection instrument 123 to measure the indexes such as optical power and wavelength. The detection instrument 123 may include a spectrum analyzer, an optical power meter, and the like. After measuring various indexes of the first light beam, it can be determined whether the first light beam meets the requirement for transmitting information, such as whether the power is in a specified range.

The first modem 13 may be an electro-optical modem, which is disposed along the emitting direction of the first light beam and is used for modulating the first light beam. The first modem 13 can adjust the first light beam by using an electrical signal corresponding to the preset information, so as to load the preset information to the first light beam, and obtain an information light beam carrying the preset information.

The first modem 13 can receive a limited signal power, and in order to enable the first modem 13 to receive the first light beam, the transmitting end 10 may further include an attenuator 131 and a collimating beam expander 132 disposed between the optical splitting assembly 12 and the first modem 13. The first light beam enters the attenuator 131, is attenuated, enters the collimating beam expander 132, is collimated, and is received by the first modem 13.

The second light beam is directly received by the light beam coupler 14 after exiting from the light splitting component, and meanwhile, the light beam coupler 14 can also receive the information light beam carrying the preset information output by the first modem 13. The beam coupler 14 can couple the received information beam with the second beam to combine the information beam into one beam, i.e., the third beam.

The coupled third light beam can be emitted and transmitted to a receiving end on the aircraft. For example, to increase the transmission distance of the third light beam, the transmitting end 10 may further include a collimating beam expander 141. The collimating beam expander 141 may be disposed in the emergent direction of the beam coupler 14, and is used for collimating and emitting the third light beam output by the beam coupler.

The third light beam emitted from the emitting end 10 passes through the atmosphere and is received by the receiving end 20. The receiving end 20 may comprise an optical target 21 and a second modem 22. The second modem 22, like the first modem, may modulate or demodulate optical signals. The second modem may demodulate the incident light beam to obtain the preset information.

The optical target surface 21 is formed by photosensitive devices for receiving laser, and can convert laser (i.e., a third light beam) from an optical signal into an electrical signal, and transmit electric energy to each device on a receiving end through a charging circuit, or transmit the electric energy to an energy storage battery for storage, so as to realize the effect of laser charging. Meanwhile, the optical target surface can also filter a part of light to the second modem 22 for demodulation to obtain preset information contained in the light beam, so as to realize the function of transmitting information by laser. The transmitting end and the receiving end provided by the embodiment can simultaneously transmit energy and information by using the same laser beam, thereby realizing the effect of simultaneous transmission of information and energy, saving resources and simplifying the device.

Illustratively, the optical target 21 may be constituted by a laser cell and a focusing lens. As shown in fig. 2, the optical target 21 includes a plurality of laser cells 211 and a focusing lens 212 laid on a flat plate. The third beam of light is directed onto the target surface 21 and converted into electrical energy by the laser cell 211, which is transmitted to various portions of the receiver 20 through the charging circuit. Alternatively, the laser battery 211 may convert the third beam into electric energy to be transmitted to the energy storage battery 213 for storage. Meanwhile, the focusing lens 212 may focus a portion of the third beam as an input beam, collimate, filter, and split the input beam before transmitting to the second modem 22 for demodulation. Specifically, in the exit direction of the focusing lens 212, a collimating mirror 23 and a beam splitter 24 (i.e., a third beam splitter) may be sequentially disposed, so as to collimate and split the light beam focused from the third light beam. The beam splitter 24 is the same as the first beam splitter 121 described above, and is capable of separating the information-bearing light beam from the light beam. The separated information beam is split again by the beam splitter 25. The beam splitter 25 is used to split the information beam into two identical beams, thereby changing the direction of beam propagation, and simultaneously separating more than one beam from the information beam for measurement. A photodetector 26 is disposed on an outgoing optical path of the beam splitter 25, and the photodetector 26 converts the incoming optical beam into an electrical signal and inputs the electrical signal to the second modem 22 for demodulation.

Two light beams split by the beam splitter 25 are input into the photoelectric detector 26, and the other light path can be provided with a detection instrument 251. The detecting device 251 is used for measuring indexes such as power and wavelength of the light beam, as in the detecting device 123. By arranging the spectroscope 25, one path of light can be branched out for measurement, and the direction of the light beam can be changed, so that the size of the device at the receiving end is reduced, and resources are saved.

Illustratively, the receiving end 20 may further include a beacon light source 27. The beacon light source 27 may emit beacon light according to which the transmitting end 10 performs positional alignment with the receiving end 20. And, the beacon light source 27 can also transmit the information demodulated from the light beam to the transmitting end through the beacon light source so as to verify the communication information. Thus, the transmitting end 10 may further comprise a photodetector 15. The photodetector 15 may detect the beacon light, convert the beacon light from an optical signal to an electrical signal, and thereby decode or demodulate the information carried by the light.

Fig. 3 shows a system architecture diagram of the transmitting end 10. As shown in fig. 3, the transmitting terminal 10 may include a control module 31, a laser transmitting module 32, an object detecting module 33, and an information processing module 34. The control module 31 is configured to supply power to the laser, and control the above modules at the transmitting end, for example, send a command for transmitting laser light (i.e., the third light beam) to the laser transmitting module 32. The laser emitting module 32 may emit the third light beam upon receiving an instruction of emitting laser light from the control module 31. The target detection module 33 can detect the beacon light transmitted by the receiving end 20 and determine the position of the receiving end 20 according to the beacon light, thereby achieving the tracking and aiming of the optical target surface in the receiving end 20. The information processing module 34 may transmit preset information to the laser emitting module 32. The information processing module 34 may also decode and demodulate the beacon light detected by the transmitting end 10, and send the demodulated information to the control module 31.

Fig. 4 shows a system architecture diagram of the receiving end 20. As shown in fig. 4, the receiving end 20 may include a control module 41, a battery management module 42, a target beacon indication module 43, and an information processing module 44. Wherein the control module 41 may control other respective modules. The battery management module 42 may receive the power converted by the optical target, so as to supply power to the control module 41, the target beacon indication module 43, and the information processing module 44. The target beacon indication module 43 may load the position information on the laser signal to emit as beacon light, so as to facilitate the position alignment of the emitting end. In addition, the target beacon indication module 43 may further load the information demodulated from the third light beam on the laser signal and transmit the laser signal to the transmitting end, so as to ensure the accuracy of communication with the transmitting end. The information processing module 44 may demodulate the information beam in the third light beam to obtain the information carried by the information beam.

In this embodiment, the transmitting end splits the same laser beam, loads information in one of the two beams, recombines the two beams into one beam, and transmits the beam, so as to transmit energy and information to the receiving end at the same time. After the laser beam emitted by the transmitting end of the receiving end is received by the receiving end, most of the laser beam is converted into electric energy for power supply, and a small part of the laser beam is focused by the focusing lens for demodulation to obtain information to be transmitted by the transmitting end. The receiving end does not need an additional wireless communication device, can simultaneously transmit energy and information through laser, and combines the energy transmission device and the communication device into a whole, thereby saving resources and simplifying the structure of the device.

The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.

Through the above description of the embodiments, those skilled in the art can clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform. With this understanding in mind, the above-described technical solutions may essentially contribute to the prior art, and may be embodied in the form of a software product, which may be stored in a computer-readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the various embodiments or some parts of the embodiments.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A laser delivery apparatus, comprising:

the light splitting component is used for splitting laser beams emitted by the laser to obtain a first light beam and a second light beam; the first modem is used for loading preset information to the first light beam and outputting an information light beam carrying the preset information; the beam coupler is used for coupling the information beam with the second beam and transmitting the coupled third beam to a receiving end;

the receiving end comprises an optical target surface and a second modem;

2. The laser delivery device of claim 1, wherein the optical target comprises a laser cell and a focusing lens;

the laser battery is used for converting the incident third light beam into electric energy; the focusing lens is used for focusing a part of light beams from the third light beams to be used as input light beams and input the input light beams to the second modem.

3. The laser transmitter of claim 1, wherein the transmitter further comprises an attenuator disposed in the exit direction of the first beam for attenuating the first beam, and the attenuated first beam is received by the first modem.

4. The laser delivery device of claim 1, wherein the beam splitting assembly comprises a first beam splitter and a second beam splitter;

the first spectroscope set up in the emitting direction of laser instrument for with laser beam that the laser instrument sent divide into two way light beams, and light beam conduct all the way the second light beam input beam coupler, another way light beam process the second spectroscope is divided into two way light beams once more, and light beam input detecting instrument all the way, another way light beam conduct first light beam input first modem.

5. The laser transmission device according to claim 4, wherein the laser beam emitted by the laser has a wavelength range of 770nm to 820 nm; the first beam splitter is used for splitting a light beam in a wavelength range of 770 to 785 nanometers to obtain a first light beam.

6. The laser transmission apparatus according to claim 1, wherein the receiving end further includes a beacon light source for emitting a beacon light, and the emitting end determines the emission position of the third light beam by detecting the beacon light.

7. The laser transmission apparatus according to claim 6, wherein the beacon light source is further configured to emit a light signal corresponding to the preset information analyzed by the second modem.

8. The laser transmission device according to claim 1, wherein the transmitting end further includes a collimating beam expander disposed in the exit direction of the beam coupler, and configured to collimate and transmit the third light beam output by the beam coupler.

9. The laser transmitter of claim 4, wherein the detection instrument comprises an optical power meter and an optical spectrum analyzer.

10. The laser transmission device according to claim 2, wherein the receiving end further comprises a third beam splitter disposed between the focusing lens and the second modem;