WDM通信系统中信道波长稳定的一种有效方法

本文提出了一种稳定ＷＤＭ通信系统中信道波长的有效方法,报道了波长稳定系统的设计原理及测试结果,测试表明,该方法是可行的。     

Differentiating QoS and Un-conflicting Channel-timeslot Allocation Algorithm in WDM

A new effective and reliable channel-timeslot allocation algorithm has been proposed, which is applied in WDM optical networks using fiber as their media to allocate the operational request. This new algorithm can differentiate the priority of all requests and avoid conflict and collision in the process of distributing channel and timeslot for the data waiting for transmission. The method in calculating the best wavelength channel and the best timeslot number is simply given. The algorithm is carried out in a math language. On the basis of the experiment results, the performance and feasibility of the algorithm are analyzed, which prove that the allocation method can reach the requirements of an algorithm both in space complexity and time complexity.     

多波长锁模激光器在WDM光纤通信中的重要应用

多波长锁模激光器为波分复用(WDM)光纤通信网络系统提供了光学梳状滤波功能,其信道间的间隙距离范围宽达100～5．125GHz,从而大大减少了网络通信系统中过去对半导体激光器的大量需求,进一步简化了现有WDM光纤通信网络的复杂性,扩大了应用范围,降低了系统应用的成本,提高了系统的可靠性。     

Simulation of chaotic synchronization communication system based on incoherent optical feedback and injection

Chaotic communicationis of great interest because ofa potential applications in secure communications andspread spectrumcommunications .Asemiconductor lasersubject to optical feedback is known to have complexdynamic behavior ,and it can produce chaotic wa…     

Novel algorithm of finding good candidate pre-configuration cycles in survivable WDM mesh network

Pre-configuration Cycle (p-cycle) is a promising ap-proach for protecting working capacities in WDMnet-works because of its ability to achieve ring-like recoveryspeed while maintaining the capacity efficiency of amesh-restorable network[1].The first and t…     

Design of buffer structure at core nodes in optical burst switching

DrivenbybothpromptincreaseofIPserviceandvast bandwidthofWDM,conventionalopticalnetworksareevolvingintothenextgenerationopticalInternet(NGOI).Somefunctionsofconfiguration,performance andfaultmanagement,executedinelectronicdomainatpresent,willbeshiftedintoo…     

New scheme of optical switch technology of time division

Intheopticalnetwork,opticalswitchcanrealizethe signaltransformandswitchinopticalfield.Thetechnol ogyincludeswavelengthdivisionandtimedivision.Thetimedivisionswitchisthebestsolution,whileitisdiffi culttoberealized,especiallyforthelargescaleandlittle timesl…     

Research on fault location technology based on BP neural network in DWDM optical network

BP neural network is introduced to the fault location field of DWDM optical network in this paper. The alarm characteristics of the optical network equipments are discussed, and alarm vector and fault vector diagrams are generated by analyzing some typical instances. A 17 × 14 × 18 BP neural network structure is constructed and trained by using MATLAB. By comparing the training performances, the best training algorithm of fault location among the three training algorithms is chosen. Numerical simulation results indicate that the sum squared error （SSE） of fault location is less than 0.01, and the processing time is less than 100 ms. This method not only well deals with the missing alarms or false alarms, but also improves the fault location accuracy and real-time ability.     

Box-like spectral response of a series-coupled microring resonant filter in a parallel channel

Inthelast decades ,microring resonator( MRR) wave-lengthfilters are developed rapidly because of their po-tential applications in wavelength division multiplexing( WDM) communicationsystems andtheir excellent fea-tures includingfunctionality,compactness a…     

Threshold level and gain of forward stimulated Brillouin scattering in a forward pumped s-band discrete DCF fibers Raman amplifier

Recently,with fast developing of extra-capacity of fi-ber communication experi mental systems ,dense wave-length division multiplexing (DWDM) technology hasbeen adopted widely[1-3].Now,1300 nmband and 1550nmband have been connected with each other to be a…     

Statistical characteristics and effects of polarization mode dispersion in dispersion managed soliton systems

Recently,the dispersion-managed solitons(DMS) areof great interest in soliton communication systems .Be-cause of some prior advantages compared with conven-tional solitons ,such as higher pulse energy and signalnoise ratio,lower averaged dispersionline an…     

Narrow-channel-spacing 32-channel AWG multiplexer with an innovative alignment method

A 32-channel 50 GHz spaced arrayed-waveguide grating（AWG） with our innovative configuration has been designed and fabricated. The performance of the device has been fully tested by using a system that consists of a tunable laser light source （TLS）, an optical power meter and a polarization controller. The insertion loss （IS） of the device is 4.2-7.4 dB. The crosstalk is about - 28 dB. The IS uniformity is less than 3.3 dB. With our configuration,the performance of the device has been enhanced effectively and the difficulty in alignment process has been decreased obviously.