J. Rossa McMahon

Learn More
The angular diameters of a Orionis and o Ceti were measured at a wavelength of 11.15 km using the two-telescope Infrared Spatial Interferometer (ISI). Based on Ðtting the visibility data to uniform disk models, the diameter of a Orionis is 54.7^ 0.3 mas and that of o Ceti at phase 0.90 is 47.8^ 0.5 mas. These diameters are the most precise ever measured in(More)
This paper derives the Cramer-Rao bound (CRB) on range separation estimation of two point sources interrogated by a three-dimensional flash laser detection and ranging (LADAR) system. An unbiased range separation estimator is also derived to compare against the bound. Additionally, the CRB can be expressed as a function of two LADAR design parameters (range(More)
We have investigated high-peak- and high-average-power operation of diode-pumped, thulium-sensitized, holmium 2.1-microm lasers. Free-running laser powers of 14 W at 29 Hz have been demonstrated with 2.6% electrical efficiency. Q-switched operation produced average powers in excess of 11 W in a burst of short pulses. Preliminary optical parametric(More)
  • 1