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Study of dual-directional high rate secure communication systems using chaotic multiple-quantum-well lasers 被引量:4
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作者 颜森林 《Chinese Physics B》 SCIE EI CAS CSCD 2007年第11期3271-3278,共8页
A scheme of synchronized injection multi-quantum-well (MQW) laser system using optical couphng-feedback is presented for performing chaotic dual-directional secure communication. The performance characterization of ... A scheme of synchronized injection multi-quantum-well (MQW) laser system using optical couphng-feedback is presented for performing chaotic dual-directional secure communication. The performance characterization of chaos masking is investigated theoretically, the equation of synchronization demodulation is deduced and its root is also given. Chaos masking encoding with a rate of 5 Gbit/s and a modulation frequency of 1 GHz, chaos modulation with a rate of 0.2 Gbit/s and a modulation frequency of 0.2 GHz and chaos shifting key with a rate of 0.2 Gbit/s are numerically simulated, separately. The ratio of the signal to the absolute synchronous error and the time for achieving synchronous demodulation are analysed in detail. The results illustrate that the system has stronger privacy and good performances so that it can be applied in chaotic dual-directional high rate secure communications. 展开更多
关键词 CHAOS MQW laser SECURE dual-directional communication
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Digital Communication Using Multi-mode Chaotic Lasers 被引量:2
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作者 WULiang ZHUShi-Qun 《Communications in Theoretical Physics》 SCIE CAS CSCD 2004年第2期225-230,共6页
The digital communication in a system of two multi-mode solid state chaotic lasers is investigated theoretically. If the usual method working well in a single-mode laser system is applied to a multi-mode laser system,... The digital communication in a system of two multi-mode solid state chaotic lasers is investigated theoretically. If the usual method working well in a single-mode laser system is applied to a multi-mode laser system, the memory effect of the two nearest digits can cause high rate of mistakes when the digits are decoded through the subtraction of receiver output from the transmittal. By introducing the deviations of two nearest maximum and minimum fluctuationsof the signal to decode the digit, the message can be decoded correctly. Also, this communication method does not critically depend on the quality of the chaotic synchronization of the two multi-mode lasers. 展开更多
关键词 digital communication multi-mode lasers chaotic synchronization
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Advanced Space Laser Communication Technology on CubeSats 被引量:4
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作者 LI Li ZHANG Xuejiao +2 位作者 ZHANG Jianhua XU Changzhi JIN Yi 《ZTE Communications》 2020年第4期45-54,共10页
The free space optical communication plays an important role in space-terrestrial integrated network due to its advantages including great improvement of data rate performance,low cost,security enhancement when compar... The free space optical communication plays an important role in space-terrestrial integrated network due to its advantages including great improvement of data rate performance,low cost,security enhancement when compared with conventional radio frequency(RF) technology.Meanwhile,CubeSats become popular in low earth orbit(LEO) network because of the low cost,fast response and the possibility of constituting constellations and formations to execute missions that a single large satellite cannot do.However,it is a difficult task to build an optical communication link between the CubeSats.In this paper,the cuttingedge laser technology progress on the CubeSats is reviewed.The characters of laser link on the CubeSat and the key techniques in the laser communication terminal(LCT) design are demonstrated. 展开更多
关键词 space laser communication laser communication terminal CUBESAT
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Synchronization and bidirectional communication without delay line using strong mutually coupled semiconductor lasers
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作者 李光辉 王安帮 +1 位作者 冯野 汪洋 《Chinese Physics B》 SCIE EI CAS CSCD 2010年第7期167-171,共5页
This paper numerically demonstrates synchronization and bidirectional communication without delay line by using two semiconductor lasers with strong mutual injection in a face-to-face configuration. These results show... This paper numerically demonstrates synchronization and bidirectional communication without delay line by using two semiconductor lasers with strong mutual injection in a face-to-face configuration. These results show that both of the two lasers' outputs synchronize with their input chaotic carriers. In addition, simulations demonstrate that this kind of synchronization can be used to realize bidirectional communications without delay line. Further studies indicate that within a small deviation in message amplitudes of two sides (±6%), the message can be extracted with signal-noise-ratio more than 10 dB; and the signal-noise-ratio is extremely sensitive to the message rates mismatch of two sides, which may be used as a key of bidirectional communication. 展开更多
关键词 SYNCHRONIZATION bidirectional communication without delay line semiconductor laser
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Study on Satellite-to-ground Laser Communications with Existence of Atmosphere
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作者 LI Hu HU Tai +1 位作者 SHAO Shiyong WU Pengfei 《空间科学学报》 CAS CSCD 北大核心 2021年第3期505-510,共6页
The laser beam used to establish a communication channel between satellite and ground segments has a small divergence angle and a tiny spot on the Earth's surface,which may lead to the fail of the system.So it'... The laser beam used to establish a communication channel between satellite and ground segments has a small divergence angle and a tiny spot on the Earth's surface,which may lead to the fail of the system.So it's important to study the deflection of laser beam by the Earth's atmosphere and find a way to calibrate this error.Both theoretical analysis and real data processing method are used to obtain the mathematical model for divergence angle of laser communication beam and its correction function.Then the model has been applied to the data,which was used to describe the atmosphere state by traditional ground segments to obtain the critical elevation angle.According to the results of calculation,our conclusion will be that the correction should be done when the critical elevation happens. 展开更多
关键词 Atmospheric deflection laser communication Satellite-to-ground CORRECTION
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Application Research on Space Laser Communication in Bistatic Radar System
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作者 李晓萍 韩绍坤 郝小宁 《Journal of Beijing Institute of Technology》 EI CAS 2003年第1期19-22,共4页
There exist three synchronizing problems in the bistatic radar system that some signals of the radar receiver must be synchronized with those of the radar transmitter. Several methods realizing data transmission, whic... There exist three synchronizing problems in the bistatic radar system that some signals of the radar receiver must be synchronized with those of the radar transmitter. Several methods realizing data transmission, which are used to complete the synchronization existing in the bistatic radar system, are described. Then a new idea is brought forward that employs space laser communication in the bistatic radar system to realize its data transmission. The theoretic analysis of the idea's usability and its merits are discussed in details. Finally the latest development of space laser communication is introduced, and the utility of the idea is pointed out further. 展开更多
关键词 space laser communication bistatic radar system data transmission channel data transmission trigger pulse radio frequency
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Acquisition,Pointing and Tracking System for Shipborne Space Laser Communication without Prior Information
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作者 WANG Xiaokang SHANG Jianhua +1 位作者 LUO Yuan HE Yan 《Journal of Donghua University(English Edition)》 CAS 2022年第3期258-264,共7页
A space laser communication acquisition,pointing and tracking(APT)system based on the beacon laser is designed without prior information.And then,a new target scanning method and a pointing and tracking algorithm are ... A space laser communication acquisition,pointing and tracking(APT)system based on the beacon laser is designed without prior information.And then,a new target scanning method and a pointing and tracking algorithm are proposed.The target scanning mode is the round-trip triangular wave scanning,and it means that scanning track of the PAN-TILT platform follows the triangular wave repeatedly.For the pointing and tracking algorithm,the beacon laser is used as the auxiliary aiming light source.The position of the beacon laser in the viewfield of the complementary metal oxide semiconductor(CMOS)camera is calculated by the centroid algorithm.In order to realize the target tracking,the joint control method of the angle control and the angular velocity control is used.The simulation and experimental results show that the APT system can achieve full coverage scanning in the scanning area and capture the target in one scanning cycle successfully.After capturing the PAN-TILT platform,the pointing and tracking algorithm can track the PAN-TILT platform quickly and accurately,and the tracking accuracy is up to 0.22 mrad. 展开更多
关键词 space laser communication acquisition pointing and tracking(APT) triangular scanning method angle control angular velocity control
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Fiber Grating Ring Laser in All Optical Communication System
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作者 YANGXiu-feng MAXiao-hong 《Semiconductor Photonics and Technology》 CAS 1999年第2期106-108,共3页
Erbium fiber grating ring laser (EFRL) witn an integrated travelling wave and low polarization mode noise is reported. Through modulated experiment of a successful 2.488 Gb/s RZ data, it is shown that the EFRL is a pr... Erbium fiber grating ring laser (EFRL) witn an integrated travelling wave and low polarization mode noise is reported. Through modulated experiment of a successful 2.488 Gb/s RZ data, it is shown that the EFRL is a promising alternative to DFB lasers for high-speed transmission applications. 展开更多
关键词 All Optical communication Er-doped Fiber Fiber Ring laser CLC number:TN253 TN929.11 Document code:A
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Acquisition and Tracking Technology for Space Laser Communication
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作者 ZHANG Jinlong CHEN Anhe +4 位作者 ZHANG Wenrui ZHANG Jianhua BIAN Jingying ZHANG Ruofan REN Bin 《Aerospace China》 2020年第3期13-21,共9页
The divergence angle of laser beam used in space laser communication is usually no more than 100μrad.Using laser beam with small divergence angle to achieve acquisition and tracking for space laser link has always be... The divergence angle of laser beam used in space laser communication is usually no more than 100μrad.Using laser beam with small divergence angle to achieve acquisition and tracking for space laser link has always been a difficult problem.In addition,the random nature of the atmosphere will affect the satellite-ground laser link,which increases the difficulty of the acquisition and stable tracking for the laser link.Thus,taking into account the above challenges for satellite-ground laser communication,an acquisition and tracking scheme of using both beacon beam and signal beam was designed for the Laser Communication Terminal(LCT)of Shijian 20 satellite.In-orbit test results indicated that under the condition of moderate atmospheric turbulence(atmospheric coherence length r0≈3 cm),the process of acquisition and tracking for the satellite-ground laser link can be completed within 1 s after the initial pointing between the LCT and Optical Ground Station(OGS)is performed,and the tracking error was less than 1μrad(3σ).In addition,the laser link can be re-established quickly once being interrupted by unsteady atmospheric turbulence,and can be maintained for a long time under moderate twurbulence conditions,which lays a foundation for future application of satellite-ground laser communication. 展开更多
关键词 space laser communication Shijian 20 satellite satellite-ground laser link acquisition and trackin
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Tutorial on laser-based visible light communications[Invited]
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作者 Yuqi Hou Yue Wang +12 位作者 Zengxin Li Meixin Liu Shulan Yi Xiaoqian Wang Liang Xia Guangyi Liu Jianyang Shi Ziwei Li Junwen Zhang Nan Chi Tien Khee Ng Boon S.Ooi Chao Shen 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第9期126-136,共11页
Facing escalating demands for high-speed,large-bandwidth,and low-latency wireless data links,laser communication technology has emerged as a promising technology.While free-space optical communication conventionally u... Facing escalating demands for high-speed,large-bandwidth,and low-latency wireless data links,laser communication technology has emerged as a promising technology.While free-space optical communication conventionally utilizes nearinfrared light sources,there has been growing interest in exploring new spectral resources,including visible lasers.Recently,laser-based white light has been demonstrated in visible light communication(VLC),with a unique capability to seamlessly integrate with illumination and display systems.This review summarizes the key devices and system technologies in semiconductor-laser-based white light for VLC-related applications.The recent advances and many emerging applications in the evolution of lighting,display,and communication are discussed. 展开更多
关键词 visible light communication LiFi laser lighting GaN laser semiconductor laser
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Demonstration of 10 Gbps satellite-to-ground laser communications in engineering
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作者 Yalin Li Hongqun Zhang +2 位作者 Peng Huang Guangtong Wan Yu Li 《The Innovation》 EI 2024年第1期7-8,共2页
In June 2023,researchers at the Aerospace Information Research Institute(AIR)of the Chinese Academy of Sciences undertook a series of experiments on satellite-to-ground laser communication using the Jilin-1 MF02A04(JL... In June 2023,researchers at the Aerospace Information Research Institute(AIR)of the Chinese Academy of Sciences undertook a series of experiments on satellite-to-ground laser communication using the Jilin-1 MF02A04(JLMF)satellite and independently developed a 500 mm optical communication ground station(AIROSG),achieving a successful throughput of 10 gigabits per second(Gbps)in the satellite-to-ground optical link.The obtained satellite payload data demonstrated good performance and satisfied the requirements of high-standard scientific applications. 展开更多
关键词 GBPS laser communication
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All-optical suppression on the impact of Sun outage in laser satellite communication systems by using a nonlinear semiconductor optical amplifier
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作者 李晓亮 刘荣科 范峰 《Chinese Optics Letters》 SCIE EI CAS CSCD 2024年第2期76-80,共5页
We introduce an all-optical approach,optical parametric amplification(OPA)processor to suppress the impact of Sun outage in laser satellite communication systems,which is implemented by only one nonlinear semiconducto... We introduce an all-optical approach,optical parametric amplification(OPA)processor to suppress the impact of Sun outage in laser satellite communication systems,which is implemented by only one nonlinear semiconductor optical amplifier driven by both electrical and optical pumps.The optimized OPA processor,with a current of 539 mA and a pump-to-signal ratio of 16 dB,could significantly improve the signal quality by 3.5 dB in experiments for the elevation angle of Sun radiation of 0 rad.The signal quality improvement is observed in the whole range of the elevation angle,confirming the effectiveness of the proposed OPA processor in the field of Sun radiation mitigation. 展开更多
关键词 nonlinear optics Sun outage laser satellite communication
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Free-Space Optical communication using visible light 被引量:2
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作者 HU Guo-yong CHEN Chang-ying CHEN Zhen-qiang 《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》 SCIE EI CAS CSCD 2007年第2期186-191,共6页
The possibility of visible red light laser being used as signal light source for Free-Space Optical (FSO) communication is proposed. Based on analysis of transmission in atmospheric channel concerning 650 nm laser bea... The possibility of visible red light laser being used as signal light source for Free-Space Optical (FSO) communication is proposed. Based on analysis of transmission in atmospheric channel concerning 650 nm laser beam, performance of wireless laser communication link utilizing a low power red laser diode was evaluated. The proposed system can achieve a maximum range of 300 m at data rate 100 Mb/s theoretically. An experimental short-range link at data rate 10 Mb/s covering 300 m has been implemented in our university. It is feasible to enhance the system performance such as link range and data rate by increasing transmitting power and decreasing laser beam divergence angle or through other approaches. 展开更多
关键词 Visible light communication Red light laser Free-Space Optical communication Wireless laser communication
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Dispersion compensation in an open-loop all-optical chaotic communication system 被引量:3
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作者 刘慧杰 任斌 冯久超 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第4期138-144,共7页
The optical chaotic communication system using open-loop fiber transmission is studied under strong injection conditions. The optical chaotic communication system with open-loop configuration is studied using fiber tr... The optical chaotic communication system using open-loop fiber transmission is studied under strong injection conditions. The optical chaotic communication system with open-loop configuration is studied using fiber transmission under strong injection conditions. The performances of fiber links composed of two types of fiber segments in different dispersion compensation maps are compared by testing the quality of the recovered message with different bit rates and encrypted by chaotic modulation (CM) or chaotic shift keying (CSK). The result indicates that the performance of the pre-compensation map is always worst. Two types of symmetrical maps are identical whatever the encryption method and bit-rate of message are. For the transmitting and the recovering of message of lower bit rate (1 Gb/s), the post-compensation map is the best scheme. However, for the message of higher bit rate (2.5 Gb/s), the parameters in communication system need to be modified properly in order to adapt to the high-speed application. Meanwhile, two types of symmetrical maps are the best scheme. In addition, the CM method is superior to the CSK method for high-speed applications. It is in accordance with the result in a back-to-back configuration system. 展开更多
关键词 chaotic communication dispersion compensation semiconductor lasers strong injection open-loop configuration
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Improving performance of optical fibre chaotic communication by dispersion compensation techniques 被引量:3
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作者 张建忠 王云才 王安帮 《Chinese Physics B》 SCIE EI CAS CSCD 2008年第9期3264-3269,共6页
This paper numerically investigates the effects of dispersion on optical fibre chaotic communication, and proposes a dispersion compensation scheme to improve the performance of optical fibre chaotic communication sys... This paper numerically investigates the effects of dispersion on optical fibre chaotic communication, and proposes a dispersion compensation scheme to improve the performance of optical fibre chaotic communication system. The obtained results show that the transmitter-receiver synchronization progressively degrades and the signal-to-noise ratio of the recovered message deteriorates as the fibre length increases due to the dispersion accumulation. Two segments of 2.5-km dispersion-compensating fibres are symmetrically placed at both ends of a segment of 245-km nonzero dispersionshifted fibre with low dispersion in one compensation period. The numerical results show that the signal-to-noise ratio of the extracted 1 GHz sinusoidal message is improved from -2.92 dB to 15.38 dB by this dispersion compensation for the transmission distance of 500 km. 展开更多
关键词 chaotic communication fibre propagation chaotic synchronization message extraction semiconductor laser dispersion compensation.
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850/940-nm VCSEL for optical communication and 3D sensing 被引量:5
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作者 Chih-Hsien Cheng Chih-Chiang Shen +12 位作者 Hsuan-Yun Kao Dan-Hua Hsieh Huai-Yung Wang Yen-Wei Yeh Yun-Ting Lu Sung-Wen Huang Chen Cheng-Ting Tsai Yu-Chieh Chi Tsung Sheng Kao Chao-Hsin Wu Hao-Chung Kuo Po-Tsung Lee Gong-Ru Lin 《Opto-Electronic Advances》 2018年第3期11-21,共11页
This paper is going to review the state-of-the-art of the high-speed 850/940-nm vertical cavity surface emitting laser(VCSEL), discussing the structural design, mode control and the related data transmission perform... This paper is going to review the state-of-the-art of the high-speed 850/940-nm vertical cavity surface emitting laser(VCSEL), discussing the structural design, mode control and the related data transmission performance. InGaAs/AlGaAsmultiple quantum well (MQW) was used to increase the differential gain and photon density in VCSEL. The multiple oxidelayers and oxide-confined aperture were well designed in VCSEL to decrease the parasitic capacitance and generate single mode (SM) VCSEL. The maximal modulation bandwidth of 30 GHz was achieved with well-designed VCSEL structure. At the end of the paper, other applications of the near-infrared VCSELs are discussed. 展开更多
关键词 vertical cavity surface emitting laser 3D sensing optical communication LIDAR virtual reality augmented reality
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Digital communication of two-dimensional messages in a chaotic optical system
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作者 周云 吴亮 朱士群 《Chinese Physics B》 SCIE EI CAS CSCD 2005年第11期2196-2201,共6页
The digital communication of two-dimensional messages is investigated when two solid state multi-mode chaotic lasers are employed in a master-slave configuration. By introducing the time derivative of intensity differ... The digital communication of two-dimensional messages is investigated when two solid state multi-mode chaotic lasers are employed in a master-slave configuration. By introducing the time derivative of intensity difference between the receiver (carrier) and the transmittal (carrier plus signal), several signals can be encoded into a single pulse. If one signal contains several binary bits, two-dimensional messages in the form of a matrix can be encoded and transmitted on a single pulse. With these improvements in secure communications using chaotic multi-mode lasers, not only the transmission rate can be increased but also the privacy can be enhanced greatly. 展开更多
关键词 digital communication multi-mode laser two-dimensional messages chaotic synchronization
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High-speed chaotic communication using an optical fibre ring as a key
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作者 邹琳 冯野 +3 位作者 杨毅彪 王安帮 杨玲珍 张建忠 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第9期238-243,共6页
A chaotic communication scheme with a fibre ring inserted in the optical ~eedback of the transmitter laser as an additional key is proposed under anticipating synchronization. The numerical results show that the key c... A chaotic communication scheme with a fibre ring inserted in the optical ~eedback of the transmitter laser as an additional key is proposed under anticipating synchronization. The numerical results show that the key can enhance the communication security effectively. It is theoretically safe for the communication scheme to transmit messages with a frequency beyond the relaxation oscllation frequency. 展开更多
关键词 chaotic communication optical fibre ring semiconductor lasers
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PERFORMANCE OF A NEW DECODING METHOD USED IN OPEN-LOOP ALL-OPTICAL CHAOTIC COMMUNICATION SYSTEM
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作者 Liu Huijie Feng Jiuchao 《Journal of Electronics(China)》 2011年第1期126-133,共8页
A new decoding method with decoder is used in open-loop all-optical chaotic communication system under strong injection condition.The performance of the new decoding method is numerically investigated by comparing it ... A new decoding method with decoder is used in open-loop all-optical chaotic communication system under strong injection condition.The performance of the new decoding method is numerically investigated by comparing it with the common decoding method without decoder.For new decoding method,two cases are analyzed,including whether or not the output of the decoder is adjusted by its input to receiver.The results indicate the decoding quality can be improved by adjusting for the new decoding method.Meanwhile,the injection strength of decoder can be restricted in a certain range.The adjusted new decoding method with decoder can achieve better decoding quality than decoding method without decoder when the bit rate of message is under 5 Gb/s.However,a stronger injection for receiver is needed.Moreover,the new decoding method can broaden the range of injection strength acceptable for good decoding quality.Different message encryption techniques are tested,and the result is similar to that of the common decoding method,indicative of the fact that the message encoded by using Chaotic Modulation(CM) can be best recovered by the new decoding method owning to the essence of this encryption technique. 展开更多
关键词 Chaotic communication Decoding performance Open-loop configuration Semiconductor lasers
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Emerging near-infrared luminescent materials fornext-generation broadband optical communications
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作者 Beibei Xu Chaoyuan Jin +5 位作者 Jae-Seong Park Huiyun Liu Xing Lin Junjie Cui Daoyuan Chen Jianrong Qiu 《InfoMat》 SCIE CSCD 2024年第8期55-84,共30页
The rapid development of emerging technologies observed in recent years,such as artificial intelligence, machine learning, mobile internet, big data,cloud computing, and the Internet of Everything, are generating esca... The rapid development of emerging technologies observed in recent years,such as artificial intelligence, machine learning, mobile internet, big data,cloud computing, and the Internet of Everything, are generating escalatingdemands for expanding the capacity density, and speed in next-generation opticalcommunications. This poses a significant challenge to existing communicationtechniques. Within this context, the integration of near-infraredbroadband, tunable, and high-gain luminescent materials into silicon opticalcircuits or fiber architectures to transmit and modulate light shows enormouspotential for advancing next-generation communication techniques. Here, thisreview provides an overview of the recent breakthroughs in near-infrared luminescentepitaxial/colloidal quantum dots, and metal-active-center-doped materialsfor broadband optical amplifiers and tunable lasers. We also expound onefforts to enhance the bandwidth and gain of these materials-based amplifiersand lasers, exploring the challenges associate with developing ultra-broadbandand high-speed optical communication systems. Additionally, the potentialapplications in Fifth Generation Fixed Networks, integration with 5G and 6Gwireless networks, compensation for current Si electronic based CMOS forhigh computing capability, and the prospects of these light sources for nextgenerationoptoelectronic devices are discussed. 展开更多
关键词 laser metal-active-center next generation optical communication optical amplifier quantum dot
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