| Spinel as Exit Aperture Window for HEL Systems |
17-Nov-2008 |
30 pages |
| Authors:
Jasbinder Sanghera; Ishwar Aggarwal; Shyam Bayya; Guillermo Villaiobos; Woohong Kim; David Reicher; Stan Peplinski; Al Ogolza; NAVAL AIR WARFARE CENTER CHINA LAKE CA RESEARCH DEPT
|
 | Spinel is an excellent candidate for HEL windows. Significantly better than glass materials: 3x stronger and harder, 10x higher thermal conductivity, significantly better thermal shock resistance, OPD is comparable to OFG and better Silica, significantly superior environmental ruggedness. Successfully developed rugged, low-loss AR coatings for Spinel. Demonstrated fabrication of a large Spinel window. Availability of high optical quality AR coated Spinel windows will have a significant impact on all DoD ... |
|
| Multi-Cylinder Apparatus for Making Optical Fibers, Process and Product |
04 MAY 1999 |
|
| Authors:
Reza Mossadegh; Jasbinder Sanghera; Ishwar Aggarwal; DEPARTMENT OF THE NAVY WASHINGTON DC
|
 | A vertically disposed apparatus used to make core-clad optical fibers includes an inner elongated cylinder removably closed at the top and provided at the bottom with an inner exit port of a smaller diameter than the inner cylinder and an outer cylinder, disposed around the inner cylinder removably closed at the top and provided at the bottom with an outer exit port of a smaller diameter than the outer cylinder. ... |
|
| Method for Producing Core/Clad Glass Optical Fiber Preforms Using Hot Isostatic Pressing |
07 APR 1998 |
|
| Authors:
Jasbinder Sanghera; Pablo Pureza; Ishwar Aggarwal; Robert Miklos; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| Core/clad glass optical fiber preforms free of bubbles and soot at the core/clad interface are fabricated by inserting a glass core rod into a cladding glass tube sized so that space remains between them, sealing the top and bottom of the tube onto the core rod to form a seated space between them which is relatively soot free and under a vacuum and then hot isostatically pressing the seated composite ... |
|
| Low Phonon Energy Glass and Fiber Doped with a Rare Earth |
29 AUG 1997 |
15 pages |
| Authors:
Brian Cole; Jasbinder Sanghera; Brandon Shaw; Barry Harbison; Ishwar Aggarwal; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| Disclosed herein is a low phonon energy glass and a fiber made therefrom. The glass includes the following components given in mol percent: X-germanium 0.1-30; arsenic 0-40; gallium; 0.01-20; and Y 40-85, wherein X is selected from the group consisting of germanium and mixtures of germanium and up to 50% of sulfur; wherein Y is selected from the group consisting of selenium; indium and mixtures thereof; and the glass also ... |
|
| Solid-State Blue Laser Source |
22 JUL 1997 |
|
| Authors:
Lew Goldberg; Michael L. Dennis; Ishwar Aggarwal; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A blue laser source outputting a beam having a wavelength of approximately 460 nm. A first laser cavity is formed around a Nd:YAG gain medium generating a first light beam having a wavelength of approximately 1064 nm. A second laser cavity, at least partially coextensive with the first laser cavity is formed around a Tm:ZBLAN gain medium generating a second light beam having a wavelength of approximately 810 nm. A ... |
|
| Metal-Coated IR-Transmitting Chalcogenide Glass Fibers |
30 JUN 1997 |
11 pages |
| Authors:
Iasbinder S. Sanghera; Pablo C. Pureza; Ishwar Aggarwal; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| Chalcogenide glass fibers are coated wth metals. The products have improved bending strength and resistance to UV, visible light, and moisture. The metal coating may be applied by any method, such as dip coating or sputtering. Typical metals include In, Sn, Bi, Pb, Tl, Zn, Cd and C. |
|
| Process for Making Optical Fibers from Core and Cladding Glass Rods. |
12 AUG 1996 |
26 pages |
| Authors:
Jasbinder Sanghera; Pablo Pureza; Ishwar Aggarwal; Reza Mossadegh; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A core/clad glass optical fiber is made by melting a core glass rod and a cladding glass rod in separate crucibles which are not concentric with respect to each other and the respective core and cladding glass melts passed out of contact with each other to a glass melt contacting zone proximate a fiber drawing orifice in which the cladding glass surrounds the core glass and a core/clad glass fiber ... |
|
| Solid-State Blue Laser Source. |
28 MAR 1995 |
23 pages |
| Authors:
Lew Goldberg; Michael L. Dennis; Ishwar Aggarwal; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A blue laser source outputting a beam having a wavelength of approximately 460 nm. A first laser cavity is formed around a Nd:YAG gain medium generating a first light beam having a wavelength of approximately 1064 nm. A second laser cavity, at least partially coextensive with the first laser cavity is formed around a Tm:ZBLAN gain medium generating a second light beam having a wavelength ... |
|
| A Refractive Index-Based Sensor for the Discrimination of Chlorinated Hydrocarbons from Groundwater. |
28 MAR 1994 |
|
| Authors:
Kenneth H. Ewing; Gregory Nau; Thomas Bilodeau; Irwin Schneider; Ishwar Aggarwal; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| A refractive index-based sensor uses a light source and an optical fiber to direct an optical beam towards a sensor/ environment face at a specific angle. The sensor has a predetermined shape selected such that the light directed into the sensor will have a specific angle of incidence designed to detect a plurality of liquids. A second optical fiber carries the light reflected off the sensor/environment face to a photodetector. ... |
|
| Hot Isostatic Pressing of Fluoride Glass Materials. |
21 DEC 1990 |
|
| Authors:
Ishwar Aggarwal; Barry B. Harbinson; DEPARTMENT OF THE NAVY WASHINGTON DC
|
| This patent application discloses an invention related to the area of glass processing. Defect-free fluoride glass materials are made by hot isostatic pressing (HIP) of a fluoride glass. The process may be used to manufacture preforms or bulk fluoride glass. The external pressure applied during HIP squeezes bubbles from the glass and permits the use of a wider range of working temperatures than ordinarily available, thereby reducing crystallization defects. |
|
Reports by Author
