Novel efficient and compact package of high power laser diode arrays with single piece microchannel heatsink cooling was designed. The width of microchannel was optimized by theoretic analysis. Using single piece microchannel heatsink we manufactured 5 bars high power laser diode stack and obtained 40W CW output, the lifetime of laser diode stack was more than 5000 hours.
We propose a novel optical-electrical hybrid contention-resolution scheme for optical packet-switched networks. This scheme exploits both electrical buffering at the ingress nodes and optical contention resolutions at the core nodes. It significantly improves the network's performance with a simple node architecture. By employing self-similar packet traffic with typical IP packet-size distribution, we demonstrate a packet-loss rate of less than 0.01 with average offered transmitter load up to 0.6 for a representative telecom network. Our results also show that the use of electrical buffering at the edge does not introduce any significant latency.
This paper presents a comparative study of contention-resolution schemes based on wavelength, time, and space domains in an unslotted optical packet-switched network with a large irregular mesh topology consisted of 15 nodes. For the first time, to the best of our knowledge, we investigated the effect of selective deflection and limited wavelength conversion. Features and performances of different combinational schemes are listed and compared. While simulation results show the effectiveness of wavelength conversion for resolving contentions over optical buffering and space deflection, physical explanations of the different effectiveness in resolving contentions of these schemes are also discussed.
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