John Logan Van Kesteren
Optometry at Camino Don Diego, Albuquerque, NM

4190814, Feb 26, 1980

Mar 1, 1978

5/882525

John A. Van Workum - Albuquerque NM

The United States of America as represented by the Secretary of the Air
Force - Washington DC

H01S 3081

331 945C

A single axis resonator for use within a laser having an annular gain region. The single axis resonator extracts optical power from the annular gain region by the use of a beam expander, reflaxicon, corner cube and output coupler, wherein the optical axis of the resonator passes through the center of the output coupler. The reflaxicon transforms a substantially elliptically-shaped beam into a crescent-shaped beam which closely resembles the shape of a section of the annular gain region. The crescent-shaped beam is reflected through the gain region several times to build up energy before being translated back into its original shape for reflection out of the laser by the output coupler.

4598338, Jul 1, 1986

Dec 21, 1983

6/564107

John P. Van Devender - Albuquerque NM
David Emin - Albuquerque NM

The United States of America as represented by the United States
Department of Energy - Washington DC

H01G 918, H01L 4500

361435

A reusable fast opening switch for transferring energy, in the form of a high power pulse, from an electromagnetic storage device such as an inductor into a load. The switch is efficient, compact, fast and reusable. The switch comprises a ferromagnetic semiconductor which undergoes a fast transition between conductive and insulating states at a critical temperature and which undergoes the transition without a phase change in its crystal structure. A semiconductor such as europium rich europhous oxide, which undergoes a conductor to insulator transition when it is joule heated from its conductor state, can be used to form the switch.