Both hardware and software are optimized simultaneously to improve the bus throughput of node computer in cluster computing network. A cost effective optical interconnection ring network is established using off-the-shelf PCs with windows operating system. A network adapter card ONIC is developed. Using ETDM and field program technique, the 1511 bandwidth of the 32bit

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.

Piezo-electronic transducer is used in combination with mechanical scanning devices to improve measurement accuracy in a distributed polarization coupling detection system. For mechanical scanning range of 150mm with 200nm resolution, the measurement error of polarization-coupling intensity can be improved from 38% to 2% in combination with a 20-nm resolution piezo-electronic transducer.

In this paper, we present a low cost fiber-optic data link for the computing cluster. The link is a 32bd-virtual channel fiber-optic computer bus used only a pair of OE devices and fbers The link is integrated with the popular PCI Bus interface in order to make the link hold the same bandwidth as that of the PCI Bus. and it can operate under managed by PCI Bus. Our research addresses how to match accessing bandwidth between computer bus and high-speed optical interconnection, and how to make low overhead and latency interfaces between optics and electronics, and integrates fiber optic link into computing system designs.

The insertion loss of a fiber optcalirotary joiot depends on the mechenical misalgnments of the collimating lenses To achieve 3-dB or less Insertion loss, the lateral nusanment of the graded index (GRIN) lenses should be less than 100μm, and the angular tilt at these lenses is limoted to 0.1 deg These requirements cauee a high mechanical fabrication and assemciy cost. To solve this problem, we design a single-channel optica1 rotary joint using a bulk optical detector The requirement on lateral misalignment is relaxed to 500μm, and the angular tilting is relaxed to 2 deg. Using this method, the cost of Ihe oplical rotary joint can be dramatically reduced