Ms. Chuanhua Wen Profile

Chuanhua Wen

at PLA Univ of Science and Technology

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Author

Publications (10)

Proceedings Article | 11 November 2008 Paper

Evaluation of satellite optical communications system performance by Gaussian approximation method

Chuanhua Wen, Xiaoyuan Yang, Jun Wang, Qiang Xu

Proceedings Volume 7136, 71363E (2008) https://doi.org/10.1117/12.802844

KEYWORDS: Satellites, Satellite communications, Telecommunications, Laser communications, Optical communications, Interference (communication), Laser systems engineering, Modulation, Sensors, Avalanche photodetectors

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Proceedings Article | 11 November 2008 Paper

Smart antenna system

Li Zhou, Chuanhua Wen

Proceedings Volume 7136, 713643 (2008) https://doi.org/10.1117/12.804206

KEYWORDS: Antennas, Telecommunications, Free space optical communications, Adaptive optics, Laser communications, Optical antennas, Signal detection, Laser systems engineering, Free space optics, Optical arrays

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Proceedings Article | 14 January 2008 Paper

Fiber Bragg grating as optical filter in laser inter-satellites communication

Xia Zou, Chuanhua Wen, Yuquan Li, Li Zou

Proceedings Volume 6781, 67810M (2008) https://doi.org/10.1117/12.742463

KEYWORDS: Optical filters, Doppler effect, Fiber Bragg gratings, Laser communications, Satellite communications, Telecommunications, Signal to noise ratio, Satellites, Optical design, Fiber lasers

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Proceedings Article | 26 November 2007 Paper

Research on antenna based on free-space laser communication

Li Zhou, Chuanhua Wen, Hao Deng

Proceedings Volume 6783, 67834L (2007) https://doi.org/10.1117/12.746505

KEYWORDS: Telescopes, Reflector telescopes, Telecommunications, Reflectors, Mirrors, Refractor telescopes, Laser communications, Objectives, Antennas, Space telescopes

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Proceedings Article | 5 October 2006 Paper

Research on telescope array for inter-satellites laser communication

Li Zhou, Chuanhua Wen

Proceedings Volume 6351, 63511Q (2006) https://doi.org/10.1117/12.690962

KEYWORDS: Telescopes, Space telescopes, Laser communications, Optical antennas, Telecommunications, Phased arrays, Antennas, Phased array optics, Optical communications, Satellites

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Recent years have seen an explosive increase in the application of inter-satellites laser communication system. Considerations make phased arrays an attractive target for optical communication applications. This paper proposes a novel telescope array for inter-satellites laser communication and investigates phased telescope arrays to be employed in receive terminals of free-space laser inter-satellites communication links. Potential advantages over single monolithic telescopes consist in non-mechanical adaptive fine pointing of the mainlobe and a reduction of terminal volume, mass and cost. First, the basic function, the interfaces, and the performance parameters of one telescope are given. Next, the structure of a receive telescope array are described, and then the performance parameters of this telescope array are discussed. The different performances including antenna gain and pattern of optical antenna and telescope array in inter-satellites laser communication system are given in this part. A quantitative assessment reveals that arrays using coaxial beam superposition are best suited for optical data communications. Based on this finding, the main characteristics of superimposing telescope arrays are calculated. And calculations prove that, in practical applications, telescope array has better performance than one telescope used in laser inter-satellites communication, and even more, the influence of incoherent background radiation is negligible. The analyses results show that smart antenna is better than optical antenna in this communication system. In many important aspects of phased array design, we will consider 1) Frequency Synchronization and 2) Beam steering as being of primary importance to the present analysis. Frequency synchronization is necessary for proper beam spatial coherence, while beam steering is critical to how this cohered beam is pointed in a desired direction. We will address system performance and implementation aspects of both issues in fiber optic control. Three basic architectures for beam steering control via optics have been reported and proposed.

Proceedings Article | 21 September 2006 Paper

Research on denoising in WDM laser inter-satellites communication system

Chuanhua Wen, Yang Su, Yuquan Li, Li Zhou

Proceedings Volume 6353, 63532B (2006) https://doi.org/10.1117/12.687270

KEYWORDS: Wavelets, Telecommunications, Signal to noise ratio, Optical filters, Receivers, Wavelength division multiplexing, Laser communications, Interference (communication), Satellites, Free space optics

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Proceedings Article | 6 December 2005 Paper

Solution of turbo codes' error floor in a radio-optical communication environment

Xueyu Niu, Huijie Qiao, Chuanhua Wen

Proceedings Volume 6022, 60222S (2005) https://doi.org/10.1117/12.636464

KEYWORDS: Computer programming, Atmospheric optics, Signal to noise ratio, Telecommunications, Optical communications, Receivers, Lutetium, Computer simulations, Free space optics, Photodetectors

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Proceedings Article | 8 February 2005 Paper

Optical antenna in laser inter-satellite communication

Chuanhua Wen, Chunxia Wang, Yuquan Li

Proceedings Volume 5626, (2005) https://doi.org/10.1117/12.571571

KEYWORDS: Laser communications, Optical antennas, Telecommunications, Satellites, Telescopes, Optical communications, Space telescopes, Satellite communications, Antennas, Reflectors

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In the modern world of telecommunications, the concept of wireless global coverage is of the utmost importance. However, real global coverage can only be achieved by satellite systems. Satellites communication is the most important mean of the communication network. The traditional satellites communication and inter-satellites links are built by microwave. In recent years, laser links for inter-satellites communication are becoming more and more important. Laser communication systems operate in a frequency range above the regulated spectrum. Laser provides many advantages for using in point-to-point ISLs (inter-satellites links) such as for links between satellites and spacecraft in deep space. Such advantages include: high speed; high bandwidth; small antenna size; narrow field of view; and narrow antenna beam. These advantages combined with the advantages in fiber optic components (optical preamplifiers, multiplexers, detectors, etc) have made laser attractive for laser links. Now we can bring WDM (wavelength-division multiplexing) to emerging broadband satellite communication systems. By using the common antenna system and ATP (Aiming, Tracking and Pointing) system, the satellites will get more capacity. In the inter-satellites laser communication, the important performances of the systems such as BER and BL both have direct relation with the optical systems. The optical systems have the function of ATP. The optical antenna is the most important component of the optical system. So the optical antenna is an important key technology to the inter-satellites laser communication. In this paper, we mainly study the optical system in the inter-satellites laser communication. we compare with three kinds of optical antennas: refractor and reflector and Catadioptrics of the passive optical system; we also analyze the effect of bandwidth to the WDM communication systems; we use the correlative software, simulate the curves of the performance of the optical antennas. These analyses will be the base of the system of WDM laser inter-satellites communication.

Proceedings Article | 28 January 2005 Paper

A realization approach of optical 3R regeneration based on four-wave mixing in dispersion-shifted fibers

Jiangping Wang, Chuanhua Wen, Yuquan Li

Proceedings Volume 5646, (2005) https://doi.org/10.1117/12.576707

KEYWORDS: Optical fibers, Modulation, Four wave mixing, Clocks, Nonlinear optics, Signal attenuation, Satellites, Refractive index, Interference (communication)

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Proceedings Article | 7 May 2004 Paper

Technology of optical MEMS in optical communication

Chuanhua Wen, Weihua Deng, Yuquan Li

Proceedings Volume 5281, (2004) https://doi.org/10.1117/12.523389

KEYWORDS: Microopto electromechanical systems, Networks, Optical communications, Switches, Telecommunications, Optical components, Dense wavelength division multiplexing, Optical networks, Atmospheric optics, Microelectromechanical systems

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Optical MEMS (Micro-Electro-Mechanical Systems) is the integration of mechanical elements, sensors, actuators, and electronics on a common silicon substrate through microfabrication technology. And Optical MEMS has created a new fabrication paradigm for optical devices and systems. Using tools developed for the integrated-circuits industry, Optical MEMS brings unprecedented levels of miniaturization and integration to optical communication systems. Today, the capacity of optical communication networks is limited by the switches that are electronic in their core. Optical MEMS is transforming the telecommunications infrastructure by providing all-optical switches that enable high-capacity networks. Optical MEMS devices are driving the trend toward all-optical telecommunication networks. With the ability to directly manipulate an optical signal, MEMS have several applications that eliminate unnecessary optical-electrical-optical (O-E-O) conversions. In optical communication, electrical components such as inductors and tunable capacitors can be improved significantly compared to their integrated counterparts if they are made using optical MEMS technology. With the integration of such components, the performance of communication circuits will improve, while the total circuit area, power consumption and cost will be reduced. In addition, the mechanical switch, as developed by several research groups, is a key component with huge potential in various microwave circuits. Optical MEMS technology is currently used in low- or medium-volume applications. There are also some of the obstacles preventing its wider adoption. Such as a mechanism giving smaller organizations responsive and affordable access to optical MEMS fabrication. And the packaging of optical MEMS devices and systems needs to improve considerably from its current primitive state. Currently the designer of an optical MEMS device requires a high level of fabrication knowledge in order to create a successful design. This paper presents the technology of optical MEMS and the application of this technology in the optical communication.

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