CN213846682U - Distributed scattering optical fiber underwater communication control system - Google Patents
Distributed scattering optical fiber underwater communication control system Download PDFInfo
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- CN213846682U CN213846682U CN202023118471.2U CN202023118471U CN213846682U CN 213846682 U CN213846682 U CN 213846682U CN 202023118471 U CN202023118471 U CN 202023118471U CN 213846682 U CN213846682 U CN 213846682U
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Abstract
The present disclosure provides a distributed scattering optical fiber underwater communication control system. The system comprises: an above-water transmitting section for transmitting a first optical signal having a first wavelength; one end of the transmission optical fiber is connected with the overwater transmitting part, and a plurality of light scattering points are arranged at preset position points of the transmission optical fiber; the underwater transmitting and receiving parts are arranged at the underwater preset positions and respectively correspond to the underwater light scattering points of the transmission optical fiber, so that a light transmission channel is formed by the underwater light scattering points and the underwater transmitting parts, and a first light signal transmitted by the above-water transmitting part is received; the receiving part on the water is arranged corresponding to the light scattering point arranged on the water surface by the transmission optical fiber, and forms a light transmission channel with the light scattering point so as to receive the light signals transmitted by the plurality of underwater receiving and transmitting parts. The communication control system combining underwater optical fiber communication and underwater wireless optical communication solves the problem of communication distance of underwater optical signals, greatly increases the communication distance of the underwater optical signals, and is more convenient for underwater networking and layout.
Description
Technical Field
The present disclosure relates to the field of underwater optical communication technologies, and in particular, to a distributed scattering optical fiber underwater communication control system.
Background
The ocean, which is the area with the largest occupied surface area, accounts for as high as 71%, and contains abundant resources. However, as the exploitation and consumption of land resources become more and more significant, the sea is gradually drawing a great deal of attention. Under the form, the requirements in the fields of underwater fishing, detection, security and the like tend to be wide. Therefore, the field of underwater communication is also becoming one of the research hotspots.
At present, common communication modes in the field of underwater communication include underwater acoustic communication, underwater wireless radio frequency communication and underwater optical communication. The underwater optical communication mainly includes two categories, namely underwater optical fiber communication and underwater wireless optical communication.
The underwater acoustic communication has the characteristics of long communication distance and mature technical development, but the underwater acoustic communication is only relied on, which is not beneficial to the rapid acquisition of underwater communication data, because the propagation speed of the acoustic wave in water is only 1500m/s, the related frequency band can reach about 1MHz, and therefore, the frequency transmission efficiency is low. The underwater wireless radio frequency communication can realize high-speed wireless duplex communication, has strong anti-interference capability and low transmission delay, is limited by shorter transmission distance, and can only realize underwater short-distance transmission at present. Different from underwater acoustic communication and underwater wireless radio frequency communication, the underwater optical communication has the characteristics of high frequency, good directivity and strong anti-interference capability due to optical carrier frequency waves. Two main communication modes in the field of underwater optical communication are underwater wireless optical communication and underwater optical fiber communication. However, underwater wireless optical communication is easy in networking and layout, but the communication distance is greatly limited due to the influence of sea water loss, turbulence and the like during information transmission. Meanwhile, underwater optical fiber communication is greatly improved in communication distance, but is difficult in underwater networking and layout. Therefore, there is a need to provide a new technical solution to improve one or more of the problems in the above solutions.
It is noted that this section is intended to provide a background or context to the embodiments of the disclosure that are recited in the claims. The description herein is not admitted to be prior art by inclusion in this section.
Disclosure of Invention
An object of the present disclosure is to provide a distributed scattering optical fiber underwater communication control system, thereby overcoming, at least to some extent, one or more of the problems due to the limitations and disadvantages of the related art.
The embodiment of the present disclosure provides a distributed scattering optical fiber underwater communication control system, which includes:
an above-water transmitting section for transmitting a first optical signal having a first wavelength;
one end of the transmission optical fiber is connected with the overwater transmitting part, and a plurality of light scattering points are arranged at preset position points of the transmission optical fiber;
the underwater transmitting and receiving parts are arranged at underwater preset positions and respectively correspond to the light scattering points of the transmission optical fiber under water, so that light transmission channels are formed by the light scattering points and the underwater transmitting and receiving parts, and the first light signals transmitted by the above-water transmitting parts are received;
and the overwater receiving part is arranged corresponding to the light scattering points of the transmission optical fiber arranged on the water surface, and forms the light transmission channel with the light scattering points so as to receive the light signals transmitted by the underwater receiving and transmitting parts.
In an embodiment of the present disclosure, the system further includes:
and the optical signal reflection part is arranged at the other end of the transmission optical fiber and is used for reflecting the optical signal transmitted by the underwater transceiving part so as to avoid the loss of the optical signal.
In an embodiment of the present disclosure, the underwater transceiver includes an underwater transmitting part and an underwater receiving part, the underwater transmitting part is configured to transmit a second optical signal with a second wavelength, and the second optical signal enters the transmission optical fiber through the light scattering point and reaches the above-water receiving part; the underwater receiving part is used for receiving the first optical signal, and the first optical signal reaches the underwater receiving part through the transmission optical fiber and partially through the light scattering point.
In an embodiment of the present disclosure, the underwater receiving part includes a second wave splitter for identifying the first optical signal.
In an embodiment of the present disclosure, the above-water receiving section includes a first wave splitter for identifying the second optical signal.
In an embodiment of the present disclosure, the first wavelength is 520 nm; the second wavelength is 450 nm.
In the embodiment of the disclosure, the water transmitting part and the underwater transmitting part respectively comprise a power module, a laser transmitting module, a signal modulating module and a laser coupling module.
In the embodiment of the disclosure, the above-water receiving part and the underwater receiving part respectively comprise an optical signal receiving module, a photoelectric conversion module, an electric signal processing module and an information reduction control module.
In the embodiment of the disclosure, the light scattering point can radiate a part of light signals in the transmission optical fiber, and the transmission optical fiber at the light scattering point comprises a fiber core, a cladding and a protective layer from inside to outside, wherein the cladding is a cladding which changes the refractive index after pretreatment.
In an embodiment of the present disclosure, the pre-treatment comprises a grinding or etching treatment.
The technical scheme provided by the embodiment of the disclosure can have the following beneficial effects:
in an embodiment of the present disclosure, according to the distributed scattering optical fiber underwater communication control system provided in this embodiment, a plurality of light scattering points are disposed on the transmission optical fiber and are disposed corresponding to the underwater transceiving portion, so as to form a light transmission channel between the light scattering points and the underwater transceiving portion, thereby facilitating mutual transmission of optical signals.
Drawings
FIG. 1 shows a schematic diagram of a distributed scattering optical fiber underwater communication control system in an exemplary embodiment of the present disclosure;
FIG. 2 shows a schematic cross-sectional view of an optical fiber at a light scattering point in an exemplary embodiment of the present disclosure;
FIG. 3 shows a schematic longitudinal cross-sectional view of an optical fiber at a light scattering point in an exemplary embodiment of the present disclosure;
fig. 4 shows a schematic view of the structure of the transmitting part in an exemplary embodiment of the present disclosure;
fig. 5 shows a schematic view of a receiving part structure in an exemplary embodiment of the present disclosure.
In the figure: an above-water launching section 101; a transmission fiber 102; an underwater transmitting/receiving unit 103; an above-water receiving section 105; an optical signal reflection unit 106; a power supply module 201; a laser emission module 202; a signal modulation module 203; a laser coupling module 204; an optical signal receiving module 301; a photoelectric conversion module 302; an electric signal processing module 303; an information restoration control module 304; a core 401; a cladding 402; a protective layer 403.
Detailed Description
Example embodiments will now be described more fully with reference to the accompanying drawings. Example embodiments may, however, be embodied in many different forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
Furthermore, the drawings are merely schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and thus their repetitive description will be omitted. Some of the block diagrams shown in the figures are functional entities and do not necessarily correspond to physically or logically separate entities.
The exemplary embodiment provides a distributed scattering optical fiber underwater communication control system. Referring to fig. 1, the system may include an above-water launching section 101, a transmission optical fiber 102, a plurality of underwater transceiving sections 103, and an above-water receiving section 105.
The water transmitting part 101 is used for transmitting a first optical signal with a first wavelength; one end of the transmission optical fiber 102 is connected with the above-water launching part 101, and a plurality of light scattering points are arranged at preset position points of the transmission optical fiber 102; the underwater transmitting and receiving parts 103 are arranged at underwater preset positions and respectively correspond to the light scattering points of the transmission optical fiber 102 under water, so as to form a light transmission channel with the light scattering points, and thus receive the first light signal transmitted by the above-water transmitting part 101; the above-water receiving unit 105 is disposed corresponding to the light scattering point on the water surface on which the transmission fiber 102 is disposed, and forms the light transmission channel with the light scattering point to receive the light signals emitted by the plurality of underwater transmitting/receiving units 103.
According to the distributed scattering optical fiber underwater communication control system provided by the embodiment, the plurality of light scattering points are arranged on the transmission optical fiber 102 and are arranged corresponding to the underwater receiving and transmitting part 103, so that a light transmission channel is formed between the light scattering points and the underwater receiving and transmitting part 103, and mutual transmission of optical signals is facilitated.
Next, the respective structures of the above-described communication control system in the present exemplary embodiment will be described in more detail with reference to fig. 1 to 5.
In one embodiment, the transmission optical fiber 102 extends from above water to below water, and a plurality of light scattering points are arranged along the length direction of the optical fiber, and the light scattering points can transmit part of the optical signal in the optical fiber into a water channel, that is, when the optical signal in the optical fiber propagates along the length direction of the optical fiber, if the optical signal encounters an artificially arranged light scattering point, part of the optical signal is scattered out of the surface of the optical fiber by the light scattering point and is received by an underwater receiving part corresponding to the scattering point. The end part of the transmission optical fiber 102 on the water is connected with the water transmitting part 101, and is used for receiving a first optical signal with a first wavelength transmitted by the water transmitting part 101, the first optical signal propagates to the water along the length direction of the optical fiber, when encountering a light scattering point arranged on the water optical fiber, a part of the first optical signal is scattered by the light scattering point and is received by the water receiving and transmitting part 103 corresponding to the scattering point, the water receiving and transmitting part 103 and the corresponding light scattering point form an optical transmission channel, the first optical signal scattered by the light scattering point reaches the water receiving and transmitting part 103 through the optical transmission channel, similarly, the optical signal transmitted by the water receiving and transmitting part 103 also reaches the light scattering point through the optical transmission channel, then enters the optical fiber through the light scattering point, propagates along the length direction of the optical fiber and is finally received by the water receiving part 105, the water receiving part 105 is arranged corresponding to the light scattering point on the water optical fiber, and the above-water receiving part 105 and the corresponding light scattering point form a light transmission channel for receiving the light signal emitted by the underwater transceiving part 103. The mode of integrating underwater optical fiber communication and underwater wireless optical communication not only solves the problem of communication distance of underwater optical signals, but also is more convenient for underwater networking and layout.
In one embodiment, as shown in fig. 1, the system further includes an optical signal reflection part 106 disposed at the other end of the transmission optical fiber 102 to reflect the optical signal emitted by the underwater transceiver 103 so as to avoid loss of the optical signal. Specifically, the optical signal emitting portion is disposed at one end of the transmission optical fiber 102, that is, at the tail portion of the optical fiber located under water, in the whole work flow of the communication control system, most energy of the optical signal is transmitted all the time along the optical fiber when the optical signal is transmitted in the optical fiber, and only a small amount of energy of the optical signal is emitted from the light scattering point, so that a part of the optical signal is transmitted at the tail portion of the underwater portion of the optical fiber, and therefore the optical signal at the tail portion needs to be processed. Therefore, the tail part is connected with the optical signal reflection device to reversely transmit the optical signal emitted from the tail part, so that the transmitted information is effectively kept secret. It should be noted that the distribution ratio of the energy emitted from the light scattering point can be controlled by human according to actual conditions.
In one embodiment, as shown in fig. 1, the underwater transceiver 103 includes an underwater transmitter for transmitting a second optical signal with a second wavelength, which enters the transmission fiber 102 via the optical scattering point and reaches the above-water receiver 105; the underwater receiving part is configured to receive the first optical signal, and the first optical signal reaches the underwater receiving part through the transmission optical fiber 102 and partially through the light scattering point.
Specifically, the underwater transmitting part and the underwater receiving part are both arranged corresponding to the light scattering point, the underwater transmitting part is used for transmitting a second light signal with a second wavelength, and the above-water transmitting part 101 transmits a first light signal with the second wavelength, in one example, the first wavelength is 520 nm; the second wavelength is 450 nm. Specifically, different signals can be conveniently identified by the receiving part through the arrangement of different wavelength signals, so that the signals are received, the received signals are subjected to deep identification processing, and the efficiency of processing the signals by the receiving part can be increased to a certain extent. The first optical signal transmitted by the above-water transmitting part 101 propagates underwater along the length direction of the optical fiber, when encountering a light scattering point provided by the underwater optical fiber, a part of the first optical signal is scattered by the light scattering point and received by the underwater receiving and transmitting part 103 arranged corresponding to the scattering point, and the underwater receiving and transmitting part 103 and the corresponding light scattering point form a light transmission channel, and the first optical signal scattered by the light scattering point reaches the underwater receiving and transmitting part 103 through the light transmission channel, and similarly, the second optical signal transmitted by the underwater receiving and transmitting part 103 also reaches the light scattering point through the light transmission channel, then enters the optical fiber through the light scattering point, propagates along the length direction of the optical fiber, and is finally received by the above-water receiving part 105. The mode of integrating underwater optical fiber communication and underwater wireless optical communication not only solves the problem of communication distance of underwater optical signals, but also is more convenient for underwater networking and layout.
In one embodiment, the underwater receiving part comprises a second wave splitter for identifying the first optical signal. Specifically, the underwater receiving part is used for receiving a first optical signal with a first wavelength transmitted by the above-water transmitting part 101, and the optical signal transmitting part arranged at the tail part of the optical fiber reflects the first optical signal and a second optical signal existing in the optical fiber, so that the optical signal entering the underwater receiving part may include the first optical signal and the second optical signal, and the underwater receiving part is provided with a second wave splitter which can enable the first optical signal with the first wavelength to be subjected to the underwater receiving part, thereby reducing the condition that the underwater receiving part performs one-to-one processing on all received optical signals to a certain extent, and improving the efficiency of the underwater receiving part in processing signals.
In one embodiment, the above-water receiving portion 105 includes a first splitter for identifying the second optical signal. Specifically, as described in the foregoing embodiment, the first wave splitter installed in the above-water receiving unit 105 can only perform identification processing on the second optical signal transmitted by the underwater transmitting unit, so that the situation that the above-water receiving unit 105 performs one-to-one processing on all received optical signals is reduced to a certain extent, and the efficiency of the above-water receiving unit 105 on signal processing is improved.
In one embodiment, as shown in fig. 2 and 3, the light scattering point can radiate a part of the light signal in the transmission fiber 102, and the transmission fiber 102 at the light scattering point includes, from inside to outside, a core 401, a cladding 402 and a protective layer 403, where the cladding 402 is a cladding 402 that has been pretreated to change the refractive index. Specifically, the light scattering point is arranged to allow the light signal confined in the fiber core 401 to be scattered from the surface of the optical fiber and received by the corresponding transceiver, which needs to break the light limiting condition of the optical fiber, and in this embodiment, the uniform distribution of the refractive index of the cladding 402 is destroyed to manufacture the scattering point, and in one example, the pretreatment includes polishing or etching, specifically, the cladding 402 can be treated by physical polishing or chemical etching to change the refractive index at the cladding 402. In addition, a layer of protective material is attached to the scattering points to complete the protection of the scattering points. And the protective material layer has small absorption attenuation to the first wavelength of the first optical signal and the second wavelength of the second signal, and the arrangement can protect the optical fiber from being exposed, and simultaneously can make the optical fiber lose the optical limiting condition at the position point, so that the optical signal can be divided into two paths at the light scattering point for continuous transmission: one is to continue transmission along the optical fiber; second, from this point along the fiber surface.
In one embodiment, as shown in fig. 4, the above-water transmitting part 101 and the below-water transmitting part each include a power module 201, a laser transmitting module 202, a signal modulating module 203, and a laser coupling module 204. Specifically, the laser emitting module 202 may be a semiconductor laser, and has the characteristics of safe use, good stability, small size and long service life. The laser coupling module 204 can use a convex lens coupling mode, and can use a passive device focusing lens and a collimating lens to realize the output of parallel beams. It should be noted that both the above-water transmitting unit 101 and the underwater transmitting unit may include a source encoder and a channel encoder, and the encoders may encode the laser signal transmitted by the laser transmitting module 202 so as to be received and identified by the underwater corresponding receiving unit. The working principle of the specific transmitting part can be understood by referring to the prior art, and is not described in detail herein.
In one embodiment, as shown in fig. 5, the above-water receiving unit 105 and the below-water receiving unit each include an optical signal receiving module 301, a photoelectric conversion module 302, an electrical signal processing module 303, and an information recovery control module 304. Specifically, the optical signal receiving module 301 is formed by an optical receiving antenna, and functions to collect the received optical signal onto the photodetector. The photodetector converts the received optical signal into an electrical signal, and then the electrical signal is transmitted to the electrical signal processing module 303, processed by the electrical signal processing module, and finally sent to the information recovery control module 304 and responded by the information recovery control module. And then, the underwater transmitting part is triggered to transmit laser signals to the corresponding light scattering points, and the laser signals are received and responded by the receiving part on the water, so that communication feedback of communication control from the water to the underwater environment is completed. It should be noted that, both the above-water receiving unit 105 and the underwater receiving unit may include a source decoder and a channel decoder, and the decoders may decode the received optical signals so that the receiving unit receives the corresponding optical signals. The operation principle of the specific receiving part can be understood by referring to the prior art, and is not described in detail herein.
According to the distributed scattering optical fiber underwater communication control system provided by the embodiment, the plurality of light scattering points are arranged on the transmission optical fiber 102 and are arranged corresponding to the underwater receiving and transmitting part 103, so that a light transmission channel is formed between the light scattering points and the underwater receiving and transmitting part 103, and mutual transmission of optical signals is facilitated.
In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and therefore should not be considered as limiting the present disclosure.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present disclosure, "a plurality" means two or more unless specifically limited otherwise.
In the present disclosure, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present disclosure can be understood by those of ordinary skill in the art as appropriate.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or may comprise the first and second features being in contact, not directly, but via another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
Claims (10)
1. A distributed scattering fiber optic subsea communication control system, comprising:
an above-water transmitting section for transmitting a first optical signal having a first wavelength;
one end of the transmission optical fiber is connected with the overwater transmitting part, and a plurality of light scattering points are arranged at preset position points of the transmission optical fiber;
the underwater transmitting and receiving parts are arranged at underwater preset positions and respectively correspond to the light scattering points of the transmission optical fiber under water, so that light transmission channels are formed by the light scattering points and the underwater transmitting and receiving parts, and the first light signals transmitted by the above-water transmitting parts are received;
and the overwater receiving part is arranged corresponding to the light scattering points of the transmission optical fiber arranged on the water surface, and forms the light transmission channel with the light scattering points so as to receive the light signals transmitted by the underwater receiving and transmitting parts.
2. The communication control system according to claim 1, further comprising:
and the optical signal reflection part is arranged at the other end of the transmission optical fiber and is used for reflecting the optical signal transmitted by the underwater transceiving part so as to avoid the loss of the optical signal.
3. The communication control system according to claim 1, wherein the underwater transmitting/receiving portion includes an underwater transmitting portion and an underwater receiving portion, the underwater transmitting portion is configured to transmit a second optical signal having a second wavelength, and the second optical signal enters the transmission optical fiber through the optical scattering point and reaches the above-water receiving portion; the underwater receiving part is used for receiving the first optical signal, and the first optical signal reaches the underwater receiving part through the transmission optical fiber and partially through the light scattering point.
4. The communication control system according to claim 3, wherein the underwater receiving portion includes a second wave splitter for identifying the first optical signal.
5. The communication control system according to claim 3, wherein the above-water receiving section includes a first splitter for identifying the second optical signal.
6. The communication control system according to claim 5, wherein the first wavelength is 520 nm; the second wavelength is 450 nm.
7. The communication control system of claim 3, wherein the above-water launching part and the below-water launching part each comprise a power module, a laser launching module, a signal modulation module and a laser coupling module.
8. The communication control system according to claim 3, wherein the above-water receiving part and the underwater receiving part each comprise an optical signal receiving module, a photoelectric conversion module, an electric signal processing module, and an information restoration control module.
9. The communication control system according to claim 1, wherein the light scattering point is capable of emitting a part of the light signal in the transmission fiber, and the transmission fiber at the light scattering point comprises, from inside to outside, a core, a cladding and a protective layer, and the cladding is a cladding which is pretreated to change the refractive index.
10. The communication control system according to claim 9, wherein the preprocessing comprises a grinding or etching process.
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Effective date of registration: 20230627 Address after: 710000 Room 023, F2003, 20th Floor, Building 4-A, Xixian Financial Port, Fengdong New City Energy Jinmao District, Xixian New District, Xi'an City, Shaanxi Province Patentee after: Shaanxi Growerm Photoelectric Technology Co.,Ltd. Address before: 710061 No. 563 South Changan Road, Shaanxi, Xi'an Patentee before: XI'AN University OF POSTS & TELECOMMUNICATIONS |