Joseph M Geary

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In this letter, we have developed a tandem electroabsorption modulator with an integrated semiconductor optical amplifier that is capable of both nonreturn-to-zero and return-to-zero (RZ) data transmission at 40 Gb/s. The tandem modulator consists of a broad-band data encoder and a narrow-band pulse carver. The pulse carver is able to produce 5-ps pulses(More)
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This paper presents an analytical method that allows for unambiguous separation of misalignment from the interferometric measurement of cylindrical optics with rectangular apertures. This method not only removes the misalignment-induced aberration from the measured wavefront data, but also yields the amount of misalignment in the test setup. We verified(More)
Fast IR wave-front aberration sensors are essential to the improved performance of HEL systems. However, one must not transfer sensor designs which function well (in principle and in practice) for the incoherent blackbody realm over into the coherent environment without first considering possible interference problems. A case history of one such sensor(More)
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