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We present a new MEMS mirror device that fulfills the requirements needed for its use in a wavelength selective switch. The MEMS device consists of a 1D array of individually controllable tilt micromirrors with almost 100% filling factor. Each mirror in the array is used to manipulate an individual wavelength channel, attenuating or redirecting it into a different output. The mirrors are electrostatically rotated around a fixed pivot and they use a novel concept of angle amplification to increase their out-of-plane angular rotation. A detailed analysis of their mechanical and optical response is presented.

HadoopUnit is a software testing framework that integrates Hadoop and JUnit to facilitate the distribution of unit tests to the nodes of a cluster for concurrent execution. It was conceived of the need to reduce test execution time for large collections of tests and has been shown to successfully accomplish this in a medium-size cluster of 150 nodes. This work considers its effectiveness on a small cluster (4 nodes) to determine any inefficiency present in the system and attempts to overcome them with the purpose of increasing performance. It was found that naïve use of HadoopUnit on a small cluster was slower than the best times achieved on a single machine, but by properly configuring the number of tests executed by each Hadoop Map task, a 75% reduction in execution time was achieved. These results show that, on a small scale, the original implementation of HadoopUnit may not be the best solution, but with the addition of a new feature, a significant increase in performance can be achieved.

We characterize a 200GHz channel grid, wavelength-selective 4x 1 switch with wide/flat passbands and low chromatic dispersion (1CD