CN111342902B - Self-adaptive distance high-speed underwater optical wireless communication device based on photomultiplier - Google Patents
Self-adaptive distance high-speed underwater optical wireless communication device based on photomultiplier Download PDFInfo
- Publication number
- CN111342902B CN111342902B CN202010090475.XA CN202010090475A CN111342902B CN 111342902 B CN111342902 B CN 111342902B CN 202010090475 A CN202010090475 A CN 202010090475A CN 111342902 B CN111342902 B CN 111342902B
- Authority
- CN
- China
- Prior art keywords
- photomultiplier
- wireless communication
- optical wireless
- communication device
- device based
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/516—Details of coding or modulation
-
- 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
- H04B10/60—Receivers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/80—Optical aspects relating to the use of optical transmission for specific applications, not provided for in groups H04B10/03 - H04B10/70, e.g. optical power feeding or optical transmission through water
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The invention discloses a high-speed underwater optical wireless communication device based on a self-adaptive distance of a photomultiplier, which relates to the field of underwater optical wireless communication and comprises an optical transmitting end and an optical receiving end, wherein the optical transmitting end comprises a radio frequency signal generating module, a power amplifier, an attenuator, a biaser, a semiconductor laser and a beam expanding system which are sequentially connected, and the biaser is also connected with direct current; the light receiving end comprises silver halide glass, a lens, a photomultiplier, a trans-impedance amplifier and a signal post-processing module which are sequentially connected. The high-speed underwater optical wireless communication device based on the self-adaptive distance of the photomultiplier, provided by the invention, can realize the transmission rate of more than one hundred meters of communication distance greater than 1Gbps, and meanwhile, the photomultiplier is not damaged in short-distance transmission. The device greatly improves the transmission distance and the transmission rate of the existing underwater optical wireless communication method, and meets the real-time transmission application requirements of underwater large-capacity data.
Description
Technical Field
The invention belongs to the technical field of underwater optical wireless communication, and particularly relates to a self-adaptive distance high-speed underwater optical wireless communication device based on a photomultiplier in underwater optical wireless communication.
Background
With the increasingly deep human activities such as marine resource exploration, oceanographic research, marine environment monitoring and the like, the demand for high-speed underwater communication is increasingly urgent. Compared with the traditional underwater acoustic communication and underwater radio frequency communication, the underwater optical wireless communication has the advantages of low energy consumption, low cost, good hiding performance and the like. By adopting a low-loss window of light in seawater, namely a blue-green light wave band, underwater optical wireless communication can support high-speed communication of hundreds of meters in the deep sea. The existing photoelectric detectors used for underwater optical wireless communication mainly include PIN photodiodes and Avalanche Photodiodes (APDs), but the sensitivity of these photoelectric detectors is not high enough to meet the detection requirement of weak signals, so that the supportable transmission distance is short. Although there are reports of long-distance underwater optical communication using a photomultiplier as a detector, the supported communication rate is low (only Kbps). On the other hand, because the dynamic range of the photomultiplier is very limited, when the transmission distance is short, the photomultiplier is easily damaged by strong incident light power, and a high-speed underwater optical wireless communication method capable of adapting to long and short communication distances is not available at present. In addition, in some long-distance high-speed underwater communication application occasions, such as deep sea applications of submarine communication, communication between an underwater robot and a deep sea work base station, data recovery of the underwater robot from a submarine sensing node and the like, an effective high-speed communication means is still lacked at present.
Disclosure of Invention
The invention mainly aims to provide a self-adaptive distance high-speed underwater optical wireless communication device based on a photomultiplier, which is used for solving the problems of short communication distance, low communication speed, limited dynamic range of a detector and the like in the related technology.
In order to achieve the purpose, the invention provides a high-speed underwater optical wireless communication device based on a self-adaptive distance of a photomultiplier, which comprises an optical transmitting end and an optical receiving end, wherein the optical transmitting end comprises a radio frequency signal generating module, a power amplifier, an attenuator, a biaser, a semiconductor laser and a beam expanding system which are sequentially connected, and the biaser is also connected with direct current; the receiving end comprises silver halide glass, a lens, a photomultiplier, a trans-impedance amplifier and a signal post-processing module which are sequentially connected.
Further, the radio frequency signal generation module is used for sequentially carrying out channel coding, signal modulation, digital pre-equalization processing and digital-to-analog conversion processing on the transmitted digital signal.
Further, the semiconductor laser is a blue/green light semiconductor laser diode with high bandwidth (bandwidth is more than 1GHz) and fiber tail output.
Further, the semiconductor laser is accompanied with temperature control for stabilizing the operating temperature of the semiconductor laser.
Further, the beam expanding system is used for collimating the output light of the expanded beam semiconductor laser.
Further, the beam expanding system is a coating convex lens group.
Further, the silver halide glass is used for adaptively attenuating the optical power so as to prevent strong light from entering and damaging the photomultiplier.
Further, the lens is a coated convex lens.
Further, the photomultiplier is a current output type photomultiplier.
Further, the signal post-processing module is configured to perform analog-to-digital conversion, channel equalization, signal demodulation, channel decoding, and the like on the received analog signal in sequence, and finally recover the transmission data.
By applying the technical scheme of the invention, the following beneficial effects are brought: the high-speed underwater optical wireless communication device based on the self-adaptive distance of the photomultiplier, provided by the invention, can realize the transmission rate of more than one hundred meters of communication distance greater than 1Gbps, and meanwhile, the photomultiplier is not damaged in short-distance transmission. The device greatly improves the transmission distance and the transmission rate of the existing underwater optical wireless communication method, and meets the real-time transmission application requirements of underwater large-capacity data.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a high-speed underwater optical wireless communication device provided by an embodiment of the invention;
FIG. 2 is a diagram of an optical transmitter according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a light receiving end according to an embodiment of the present invention;
in the figure: the device comprises a light transmitting end 1, a light receiving end 2, a radio frequency signal generating module 3, a power amplifier 4, an attenuator 5, a biaser 6, a semiconductor laser 7, a beam expanding system 8, silver halide glass 9, a lens 10, a photomultiplier 11, a transimpedance amplifier 12 and a signal post-processing module 13.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
It should be noted that the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover non-exclusive inclusions, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Exemplary embodiments according to the present application will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art, in the drawings, it is possible to enlarge the thicknesses of layers and regions for clarity, and the same devices are denoted by the same reference numerals, and thus the description thereof will be omitted.
With reference to fig. 1 to 3, the present invention provides a high-speed underwater optical wireless communication device based on a self-adaptive distance of a photomultiplier, which includes an optical transmitting end 1 and an optical receiving end 2, wherein the optical transmitting end 1 includes a radio frequency signal generating module 3, a power amplifier 4, an attenuator 5, a bias device 6, a semiconductor laser 7 and a beam expanding system 8, which are connected in sequence, and the bias device 6 is further connected with a direct current; the light receiving end 2 comprises silver halide glass 9, a lens 10, a photomultiplier tube 11, a transimpedance amplifier 12 and a signal post-processing module 13 which are connected in sequence.
Specifically, the radio frequency signal generation module 3, the power amplifier 4, the attenuator 5 and the biaser 6 are connected in sequence by a radio frequency wire with an SMA head. The anode of the photomultiplier tube 11, the trans-impedance amplifier 12 and the signal post-processing module 13 are sequentially connected by a radio frequency wire with an SMA head.
When the laser system works, the radio frequency signal generating module 3 is used for sequentially performing channel coding, signal modulation, digital pre-equalization processing (for eliminating part of intersymbol interference, improving system high-frequency fading and improving system communication performance), digital-to-analog conversion processing and the like on a transmitted digital signal to generate an analog radio frequency signal (such as an image, a video, a file and the like), the generated radio frequency signal is input into the power amplifier 4, the power amplifier 4 is connected with the attenuator 5, the power amplifier 4 and the attenuator 5 are used for adjusting and realizing the optimal radio frequency signal output power, the amplified radio frequency signal is connected with the biaser 6, the biaser 6 is used for coupling a direct current signal and the radio frequency signal to drive the semiconductor laser 7 to work, and the direct current is selected in the optimal working range, so that the semiconductor laser 7 works in a linear working area of a laser output characteristic. The output light of the semiconductor laser 7 enters the seawater for transmission after being collimated and expanded by the beam expanding system 8. The divergence angle of the laser is reduced after the laser is expanded, and meanwhile, the alignment difficulty of the light beam at the receiving end is also reduced. In practical applications, the rf signal generating module 3 may be an Arbitrary Waveform Generator (AWG).
The modulation format of the signal modulation may adopt a low-order modulation format such as on-off keying (OOK), Pulse Position Modulation (PPM), or a high-order modulation format such as Pulse Amplitude Modulation (PAM), quadrature amplitude phase modulation (QAM), Orthogonal Frequency Division Multiplexing (OFDM), and carrierless amplitude phase modulation (CAP), so as to improve the bit transmission rate of the communication system.
The laser beam transmitted by the seawater for a certain distance firstly passes through the silver halide glass 9, the silver halide glass 9 is used for self-adaptive attenuation to receive the optical power, the principle is similar to that of a color-changing sunglass, when strong light enters, the attenuation of the glass is increased, when weak light enters, the attenuation of the glass is reduced, the optical power entering the photomultiplier tube 11 is dynamically adjusted, and the photomultiplier tube 11 is prevented from being damaged by the strong light. The laser beam penetrating through the silver halide glass 9 is converged by the lens 10 and then enters a cathode receiving surface of the photomultiplier tube 11, the photomultiplier tube 11 is driven by a high-voltage power supply to work in a linear output state, a current signal output by an anode of the photomultiplier tube 11 is input into the transimpedance amplifier 12, the current signal is converted into a voltage signal by the transimpedance amplifier 12 to be output, and the output voltage signal is used for subsequent signal processing to recover original transmitted information. The signal post-processing module 13 performs analog-to-digital conversion, channel equalization, signal demodulation, channel decoding, and the like on the electrical signal, and finally recovers the transmission data. Thereby completing the entire communication process. The signal post-processing module 13 may employ a sampling oscilloscope.
In a possible implementation manner, the semiconductor laser 7 is a blue/green light semiconductor laser diode with high bandwidth (bandwidth greater than 1GHz) and fiber pigtail output, such as LP450-SF15, LP520-SF15 and the like of Thorlabs, and the output light spot is a circular spot, which has good quality and is easy to expand.
In a possible implementation manner, the semiconductor laser 7 is accompanied by temperature control for stabilizing the operating temperature of the semiconductor laser 7 and preventing the operating wavelength from shifting, which causes instability of the communication system.
In one possible implementation, the beam expanding system 8 is a coated convex lens group.
In one possible implementation, the lens 10 is a convex lens 10. The convex lens 10 used is a blue/green antireflection film plated lens 10.
In a possible implementation manner, the photomultiplier tube 11 is a current output type photomultiplier tube 11 with a nanosecond rising edge, and converts a received light signal into a current signal output.
In one possible implementation, the transimpedance amplifier 12 is a high-bandwidth, high-gain, low-noise transimpedance amplifier.
The technical scheme of the embodiment of the invention improves the transmission distance and the transmission speed of the current underwater optical wireless communication technology, can realize the transmission speed of more than one hundred meters with the communication distance larger than 1Gbps, and can still work normally when strong light signals enter in the short-distance communication process. The technical scheme provided by the embodiment of the invention is suitable for application occasions such as data recovery from the seabed sensing nodes by the underwater robot, cableless communication between underwater equipment platforms, safe hidden communication between submarines and surface ships and the like.
The foregoing examples are provided only for the understanding of the method and its core concept, and are not intended to be limiting, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention are intended to be equivalent substitutions within the scope of the present invention.
Claims (9)
1. A self-adaptive distance high-speed underwater optical wireless communication device based on a photomultiplier is characterized by comprising an optical transmitting end and an optical receiving end,
the optical transmitting end comprises a radio frequency signal generating module, a power amplifier, an attenuator, a biaser, a semiconductor laser and a beam expanding system which are sequentially connected, wherein the biaser is also connected with direct current;
the light receiving end comprises silver halide glass, a lens, a photomultiplier, a trans-impedance amplifier and a signal post-processing module which are sequentially connected;
the silver halide glass is used for adaptively attenuating the optical power so as to prevent strong light from entering and damaging the photomultiplier.
2. The high-speed underwater optical wireless communication device based on the self-adaptive distance of the photomultiplier as claimed in claim 1, wherein the radio frequency signal generation module is used for sequentially performing channel coding, signal modulation, digital pre-equalization processing and digital-to-analog conversion processing on the transmitted digital signal.
3. The high-speed underwater optical wireless communication device based on the self-adaptive distance of the photomultiplier as claimed in claim 1, wherein the semiconductor laser is a high-bandwidth blue/green semiconductor laser diode with fiber pigtail output.
4. The high-speed underwater optical wireless communication device based on the self-adaptive distance of the photomultiplier as claimed in claim 1, wherein the semiconductor laser is accompanied by temperature control for stabilizing the operating temperature of the semiconductor laser.
5. The adaptive-distance high-speed underwater optical wireless communication device based on photomultiplier tubes according to claim 1, wherein the beam expanding system is used for collimating the expanded beam semiconductor laser output light.
6. The high-speed underwater optical wireless communication device with adaptive distance based on the photomultiplier according to claim 1, wherein the beam expanding system is a coated convex lens group.
7. The high-speed underwater optical wireless communication device with adaptive distance based on photomultiplier according to claim 1, wherein the lens is a convex lens.
8. The high-speed underwater optical wireless communication device based on the self-adaptive distance of the photomultiplier according to claim 1, wherein the photomultiplier is a current output type photomultiplier.
9. The high-speed underwater optical wireless communication device based on the self-adaptive distance of the photomultiplier as claimed in claim 1, wherein the signal post-processing module is configured to perform analog-to-digital conversion, channel equalization, signal demodulation, and channel decoding on the received analog signal in sequence, and finally recover the transmitted data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010090475.XA CN111342902B (en) | 2020-02-13 | 2020-02-13 | Self-adaptive distance high-speed underwater optical wireless communication device based on photomultiplier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010090475.XA CN111342902B (en) | 2020-02-13 | 2020-02-13 | Self-adaptive distance high-speed underwater optical wireless communication device based on photomultiplier |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111342902A CN111342902A (en) | 2020-06-26 |
| CN111342902B true CN111342902B (en) | 2021-01-19 |
Family
ID=71187820
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010090475.XA Active CN111342902B (en) | 2020-02-13 | 2020-02-13 | Self-adaptive distance high-speed underwater optical wireless communication device based on photomultiplier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111342902B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112600625B (en) * | 2020-12-08 | 2022-09-23 | 复旦大学 | Distance measurement and communication integrated spatial laser heterodyne coherent demodulation processing module and method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431085A (en) * | 2007-11-09 | 2009-05-13 | 鸿富锦精密工业（深圳）有限公司 | Camera module group with automatic exposure function |
| CN105680941A (en) * | 2016-02-26 | 2016-06-15 | 中国科学技术大学 | Underwater LED (Light-Emitting Diode) long distance communication system based on visible light |
| CN106100755A (en) * | 2016-05-30 | 2016-11-09 | 中国科学院上海光学精密机械研究所 | Adaptive wireless optical communication apparatus and method under water |
| CN207947783U (en) * | 2018-03-27 | 2018-10-09 | 谢杰荣 | A kind of visible light diving communication device |
-
2020
- 2020-02-13 CN CN202010090475.XA patent/CN111342902B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101431085A (en) * | 2007-11-09 | 2009-05-13 | 鸿富锦精密工业（深圳）有限公司 | Camera module group with automatic exposure function |
| CN105680941A (en) * | 2016-02-26 | 2016-06-15 | 中国科学技术大学 | Underwater LED (Light-Emitting Diode) long distance communication system based on visible light |
| CN106100755A (en) * | 2016-05-30 | 2016-11-09 | 中国科学院上海光学精密机械研究所 | Adaptive wireless optical communication apparatus and method under water |
| CN207947783U (en) * | 2018-03-27 | 2018-10-09 | 谢杰荣 | A kind of visible light diving communication device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111342902A (en) | 2020-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Xu et al. | OFDM-based broadband underwater wireless optical communication system using a compact blue LED | |
| Li et al. | Optical communication using subcarrier PSK intensity modulation through atmospheric turbulence channels | |
| Langer et al. | Recent developments in optical wireless communications using infrared and visible light | |
| CN105680941A (en) | Underwater LED (Light-Emitting Diode) long distance communication system based on visible light | |
| Khalighi et al. | Silicon-photomultiplier-based underwater wireless optical communication using pulse-amplitude modulation | |
| CN109150515B (en) | Submarine communication system based on continuous variable quantum key distribution and implementation method thereof | |
| CN106603156B (en) | Terahertz digital communication system and method based on polarization coding | |
| CN107508649A (en) | A kind of underwater laser time dissemination system and method based on the Big Dipper | |
| US20180241475A1 (en) | Wireless optical communication system and optical transmitter thereof | |
| WO2020201818A1 (en) | Across water-air interface communication method and system | |
| Zhuang et al. | First demonstration of 400Mb/s PAM4 signal transmission over 10-meter underwater channel using a blue LED and a digital linear pre-equalizer | |
| CN111342902B (en) | Self-adaptive distance high-speed underwater optical wireless communication device based on photomultiplier | |
| Patnaik et al. | Design and study of high bit–rate free–space optical communication system employing qpsk modulation | |
| Wei et al. | Wearable full-duplex digital transceiver for underwater optical wireless communications | |
| Deng et al. | Software defined adaptive MIMO visible light communications after an obstruction | |
| Singh et al. | Performance enhancement of 112 Gbps UWOC link by mitigating the air bubbles induced turbulence with coherent detection MIMO DP-16QAM and advanced digital signal processing | |
| Ping et al. | Low cost 400GE transceiver for 2km optical interconnect using PAM4 and direct detection | |
| CN110365414A (en) | A kind of enhanced smooth modulating method being suitable for lognormal Turbulence Channels | |
| CN103051375A (en) | Heterodyne detection system and method for wireless laser communication | |
| Chen et al. | Experimental demonstration of real-time optical DFT-S DMT signal transmission for a blue-LED-based UWOC system using spatial diversity reception | |
| Kodama et al. | Comprehensive analysis of time-domain hybrid PAM for data-rate and distance adaptive UWOC system | |
| US20180287709A1 (en) | Optical communication transmitter | |
| CN114499696B (en) | Underwater blue-green light high-speed full-duplex communication-in-motion system and method | |
| Tiwari et al. | Modeling and analysis of hybrid SIM with L-PPM and MSK over double generalized gamma distribution in free space optical communication system | |
| CN115333634A (en) | High-bandwidth and multi-degree-of-freedom wireless optical communication system suitable for commercial illumination LED |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |