Glass - Back to the Future!



Presenting Author:
Jas Sanghera
<sanghera@nrl.navy.mil>

article posted 27 Feb 2016


Dr. Jasbinder S. Sanghera is Head of Optical Materials and Devices at the Naval Research Laboratory in Washington, DC, where he manages about 30 scientists in all aspects of optical materials and devices. The range of materials includes optical fibers, thin films, bulk monoliths, glasses, crystals, glass-ceramics, and polycrystalline ceramics. These are being developed for a wide range of applications.

Prior to joining NRL, he received a PhD from Imperial College, London followed by a Postdoc position at UCLA, Los Angeles, California.

He has received numerous awards including the 1998 Young Scientist Award for Specialty Glass Fiber Optics from ISNOG, the 2009 Sigma Xi Award for Applied Science, several DoD Technology Transfer Awards, several Publication and Edison Patent Awards, the Federal Laboratories Consortium (FLC) National and Mid- Atlantic Awards for Excellence in Technology Transfer. In 2011, he received OSA?s prestigious David Richardson Medal as well as the Navy?s Arthur E. Bisson Prize. In 2012 and 2013, he was elected to Fellow of OSA and SPIE, respectively. He has transitioned several technologies to industry, published over 250 papers, edited a book on "IR Fiber Optics", presented more than 200 technical talks, and has more than 75 patents. He is also on the organizing committee for several conferences.







Next Generation Multiband Glass Optics for Sensor Systems

Jas Sanghera1,*, Dan Gibson1, Shyam Bayya1, Vinh Nguyen1
Mikhail Kotov2, Collin McClain3


There is a strong desire to reduce size and weight of single and multiband IR imaging systems in sensing operations on hand-held, helmet mounted or airborne platforms. NRL is developing new IR glasses that expand the glass map and provide compact solutions to multispectral imaging systems.

These glasses were specifically designed to have comparable glass molding temperatures and thermal properties to be able to laminate and co-mold the optics and reduce the number of air-glass interfaces (lower Fresnel reflection losses).

Our multispectral optics designs using these new materials demonstrate reduced size, complexity and improved performance. In addition, graded index (GRIN) optics offer potential for even more weight savings and increased performance but have so far been limited to visible and NIR bands (wavelengths shorter than about 0.9 μm).

NRL is developing a capability to extend GRIN optics to longer wavelengths in the infrared by exploiting diffused IR transmitting chalcogenide glasses. These IR-GRIN lenses are compatible with all IR wavebands (SWIR, MWIR and LWIR) and can be used alongside conventional materials.



This presentation will cover discussions on the new optical materials, multispectral designs, as well fabrication and characterization of new optics.





Institutions:

1 US Naval Research Laboratory, Code 5620, 4555 Overlook Ave SW, Washington, DC 20375, USA

2 Sotera Defense Solutions, Herndon, VA 20171, USA

3 University Research Foundation, Greenbelt. MD 20770, USA