最新刊期
卷 ， 期 3 ， 1998
- 摘要：The paper begins with an introduction about the transit from time division multiplexing to wavelength division multiplexing. Then, it describes in detail the application of WDM systems on long distance lines and possible applications in local networks, including those interoffice lines and some access lines. The paper also points out the possibility of using WDM technology in developing all optical networking, as well as the applications of WDM systems in submarine optical cables.关键词：Wavelength division multiplexing;time division multiplexing;long distance communication;optical fiber communication;local communication
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- 19
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- 1
发布时间： - 摘要：The dispersion compensation system of 10 Gbit/s is invested by numerical simulation, and the effects of diferrent dispersion compensation values on the transmission system are analyzed. It is find that proper undercompensation can enhance the system performance. The result is beneficial for the design of system parameters.关键词：dispersion compensation;fiber loss;selfphase modulation;amplifier selfemission noise
- 2
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- 46
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- 2
发布时间： - 摘要：This paper introduces some methods applied in SDH. They include parallel frame aligner and parallel scrambler that can realize the functions that must be realized in high speed circuits before in low speed circuits, so that the circuit’s stability is increased and the power dissipation is reduced. And the paper also introduces a digitalization pretreatment method that can smooth the 24 bit jitter caused by AU4 pointer adjustment. In addition, the paper introduces STM1 multiplexing application specific integrated circuit TSOH99001 that uses those methods, and presents the chip’s scheme.关键词：parallel frame aligner;parallel scrambler;desynchronization;application specific integrated circuit
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- 36
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- 1
发布时间： - 摘要：A new ATM based PON（APON）system is introduced in this paper. First, we explore characters, topology, technical challenges, and the newest development of trail fields in APON system. Then some new viewpoints and ideas are proposed. In the end, we forecast the futrue of APON.关键词：optical access network;passive optical network;ATM
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- 24
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发布时间： - 摘要：The construction of the subscriber access network in rural areas with the new technique has now become the trend. This paper introduces the basic concept of the access network and V type interfaces first, then describes the development trend of access technique. The relevant construction strategy of the subscriber access network in the rural areas of our country has been discussed at last.关键词：V5 interface;rural area communication;subscriber access network
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- 13
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发布时间： - 摘要：In this article, we introduce a system of optical fiber image transmission for image surveillance, and describe the main technologies and special featuries in detail, then provide the specifications of the system.关键词：image surveillance;optical fiber image transmission
- 5
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- 114
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- 2
发布时间： - 摘要：The principle of dispersionsupported transmission and the limitation for the laser diodes is analyzed. Furthermore,fiber transfer function and determination of receiver frequency response is analyzed in this paper.At last we give some conclusions.关键词：dispersion compensation;dispersionsupported transmission;optical communications
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- 49
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发布时间： - 摘要：The interaction between optical solitons with linear chirp in twincore coupling fibers is studied by using variational principle and the expression of the chirp evolving is obtained. The results show the chirp increases the interaction between optical solitons in twincore coupling fibers. We also put forward new schemes about how to decrease the interaction between optical solitons.关键词：optical soliton;coupling fiber;frequency chirp;variational principle
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- 28
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- 3
发布时间： - 摘要：This paper reports the study and manufacture of data optical fiber by PCVD process, including the design of data optical fiber, process program, and important process prlblem. This paper gives the statistical result of this data optical fiber product properties also.关键词：PCVD process;data optical fiber;optical fiber development
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- 67
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发布时间： - 摘要：In this article, we introduced how to improve the photosensitivity, the temperatureinsensitivity and the suppression of coupling into cladding modes during the process of designing and making the fiber specialized in ultravioletwritten fiber grating.关键词：ultravioletwritten grating;fiber grating;photosensitivity;claddingmode
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- 86
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- 1
发布时间： - 摘要：The applications of fiber gratings in singlefrequency fiber lasers, EDFA, WDM, and dispersion compensation are reviewed.关键词：fiber grating;fiber laser;EDFA;WDM;dispersion compensation
- 3
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- 190
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- 25
发布时间： - 摘要：This paper reports a polarizationindependent optical circulator having high isolatity over a wide wavelength range. A 3port optical circulator has been manufactured with singlemode fibers. Its insertion loss and isolatity have been respectively measured to be ≤1 dB and ≥48 dB at the center wavelength of 1.55 μm. Its polarizationdependent loss is ≤0.2 dB , crosstalk is ≤-50 dB, and return loss ≥50 dB.关键词：Optical Circulator;Birefringent Crystal;optical passive device
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- 211
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发布时间： - 摘要：The main factors affecting the quality of semiconductor heterostructure epitaxy chips, inspection methods and some typical test results have beeen introduced in this pater. Finally, some reference criteria for the quality inspection of epitaxy chip materials are given.关键词：heterostructure material;dislocation and defect;Xray double crystal diffraction;photoluminescence spectrum
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- 65
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