在国内首次研制了使用1个光纤放大器的10频道102km无再生中继“WDM+EDFA”全光光纤传输实验系统。每频道传输码率为140Mb/s或280Gb/s NRz。所用光纤放大器为增苴平坦型，小信号增苴为35dB。系统全部采用国产DFB激光器，奋频道连长分别为153l、1535、1537、1545、1547、1549、155l、1559、156lnm，在波长为155lnm的频道内布置了2路频分复用（FDM）系统。波长分市遍及整个光纤放大器的通带。经无再生中继传输102km后，在误码丰为1×10-9条件下，实测了尚有数dB以上（最大为12dB）的功丰裕量。系统使用光栅合、分波器作为波分复用和解复用器，频道间隔为2nm及其整数倍，系统具有18个频道的能力。

This paper is contributed to discuss the impacts of group velocity dispersion, nonlinear Kerr effect and polarization mode dispersion in optical fibers. Using split-step Fourier method, we first analytically analyze that the interaction of Kerr effect and polarization mode dispersion results in the pulse asymmetric spectra. Then we study that polarization mode dispersion and group velocity dispersion play their roles independently, and that, depending on the relative magnitudes, the two factors affect the pulse differently. Finally, we research the combined impacts of group velocity dispersion, Kerr effect and polarization mode dispersion. Detailed investigation reveals that the combined effects are different in anomalous and normal group velocity dispersion regime. We point out that increased Kerr effect can suppress the impact of polarization mode dispersion in anomalous chromatic dispersion regime, and that, for the given values of incident power and polarization mode dispersion, anomalous group velocity should be large enough for the polarization mode dispersion to be effectively suppressed by the Kerr effect.

In this paper we propose a new protocol called trine-space label switching protocol (TSL-SP) in optical burst switching (OBS), and define the terms time-space label (TSL) and time-space routing (TSR). An important concept of response time is introduced ha the trine label mechanism. The TSL-SP is a new technology that can quickly and efficiently forward data with a label on the optical networks. A two-dimension label switched path (TD-LSP) can be set up, that is maintained and deleted by the TSL-SP For clearly illuminating the operation principles of the TSL-SR we propose a new approach of orthogonal trine-space coordinates in which the vertical coordinate is the space label and the horizontal coordinate is the time label. The proposed TD-LSP can tramatically reduce the routing failure probability and greatly improve the link network efficiency compared with other signaling protocols. Moreover, we define the time-space label control plane that can achieve the higher efficiency. When the TSL-SP is applied to networks, switching performance can be improved by two orders compareal to the switching performance with the conventional OBS signaling protocols. The fundamental goal of TSL-SP is to band the signaling and routing functions together closely. Also, the TSL-SP can reduce the complexity of the network, support automatic service offering, and provide traffic engineering.

Under the guidance of the related theory detailed in this paper, we propose to construct optical packet buffer element used in the optical packet switched networks (OPSN) with electromagnetically induced transparency (EIT) medium. Two different types of buffers (i.e., traveling-type buffer and storing-type buffer) and corresponding buffer structures constructed with them are given.

IP Over WDM是下一代网络的普遍模式，如何建立波长通道是非常重要的问题。本文就静态和动态情况分别讨论了直通光路的建立原则，介绍了相应的算法，并且各自给出例子。最后展望了IP网结合WDM网直通光路的发展前景。