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No abstract

When an internal Brewster plate is used to polarize a Nd:YAIG laser, its output power generally decreases. This is shown to be largely due to the thermally induced birefringence in the laser rod, which causes a polarization rotation inside the optical cavity and hence a reflection loss at the polarizer. Calculation of this loss for a typical laser has been made and is compared to observed decreases in output power.

The Bellcore METROCOREm network is a test bed prototype of a metropolitan area network (MAN) for exploring new network concepts and technology applications in broadband communications.This system operates at 150 Mb/s with the potential for upgrading to multi Gb/s. A basic hardware architecture has been designed which consists of a network interface (media access control (MAC) layer), and several independent, modular units that interface to various services. At the MAC layer, integrated services are supported by giving priority to those traffic types requiring bounded delay. The software network architecture includes a network controller to configure, monitor, and administer the network.