基于白光干涉原理，通过麦克尔逊干涉仪的光程补偿作用，检测保偏光纤空间分布寄生偏振耦舍强度和耦合点位置。经数据采样时域理论分析知：扫描步长增大时，耦合强度检测误差和耦合点位置判断误差呈线性增大。扫描步长小于500nm时，强度误差小于5%，位置误差在±11mm之内。

以白光麦克尔逊干涉仪对双折射保偏光纤的偏振耦合进行测试，并基于仪器结构建立了测试扫描结果的数学模型，分析及仿真了信噪比对耦合强度及耦合位置检测的影响大小及变化趋势。信噪比大于32Db，可满足偏振耦合测试的要求。

In this paper, a new scheme has been proposed to achieve high-performance local area network adoptii/g 5～15nm separdted eosrse wavelength division multiplexing (CWDM) technique. Using this scheme, the current single-wavelength gigabit Ethernet can be sesmlessly upgrdded to multi-wavelength network. Not only can the network bandwidth be broadeneds but also wavelength routing can be achieved among different sub-networks. The dam packet communication latency can be reduced one-to-two magnitudes in comparison with that of the current gigabit Ethernet. To expand the network scale, multi-wavelength-window CWDM teehifique can be adopted. Two kinds of network interface cards have been designed using opto-electronics devieosst the 850nm and 1300nm wavelength windows, respectively. Experiment.s indicate that the two kinds of CWDM signals can be selectively received at the corresponding optical detectors. By introducing two optical droppiing devices in the network, multi-wavelength-window (850nm, 1300nm and 1550nm) CWDM system can be achieved.

White light interferometry has been adopted to measure distributed polarization coupling in high-birefringence waveguides. Since the coupling mode is weak compared to the exciting mode, the contrastratio of the interferogram is very low. This will increase the difficulty of direct detection of the polarization coupling intensity. By rotating the angle between the polarization eigenmodes and the principal axis of the linear polarizer from 45˚ to 85˚, the contrast ratio of the interferogram can be improved more than 10 times. As a result, the measurement sensitivity can be improved more than 100 times.

In this paper; we discuss the optical fiber interconnection rech. nologlesappbedinthem, orypes of parallel pmcessing systems 1) u backplane intercotmectian in a parallel processor array system and 2) a computing cluster network We have get up a parallel procesor array system using optical fiber to make point4o-pomt interconnection between procesror elements and are develomng a low cost virtnal parallel optical fiber interonnection hnk (VPOFLblb) complying with pertpberal component interconnect (PCI) local bus specifications for tbe computing cluster VPOFLink is integrated with tbe popular PCI bus interface in order to make the link hold the same bandwidth as that of the PCI bus It was fabricated as an available peripheral device that can been inserted rata the bus xlots of commercial computers directly and can operate under the control of PCI bus Also in this paper, we demonsate the optical fiber link for a ring network and the arcbitecture of the ring network