Special Coverage

Home

Securing and Validating Critical Vision Data

Manufacturing companies are placing increasing emphasis on data security throughout their operations to protect confidential data and to validate that their systems are protected against unauthorized and unwanted changes. The critical role that vision plays in many manufacturing processes makes it essential that system security be improved for vision applications. A new generation of vision-specific security tools offers improvements in access control, change tracking, auditing, and general network security to help ensure the integrity of vision applications while at the same time protecting data confidentiality.

Posted in: Applications, Photonics, Application Briefs

Read More >>

Solar Pumped Fiber Laser for Solar Sail Propulsion and Remote Power Transfer

The photovoltaic capability of any instrument can be enhanced by delivering extra power via a space-based, broadband laser beam. Goddard Space Flight Center, Greenbelt, Maryland A new method has been developed to create coherent laser light efficiently with direct optical coupling of the Sun’s energy into the gain medium for multiple uses. New advances in solar cell photovoltaic (PV) technologies have greatly improved their efficiencies, mostly by improving their ability to convert many wavelengths or wider bands of the solar spectrum to electricity. New advances in actively doped fibers and optical glasses have been shown to produce very broad, multi-line absorption bands as well as stimulated emission lines, or laser lines. By designing the optical cavity system to feed back all emission bands into the gain media for amplification, a multi-wavelength source can be generated requiring no electronics.

Posted in: Tech Briefs, Physical Sciences, Photonics, Briefs

Read More >>

ELID Grinding of Large Aspheres

Goddard Space Flight Center, Greenbelt, Maryland This work focused on a manufacturing process to produce silicon carbide optical surfaces with low mid-spatial surface errors. Mid-spatial frequency (MSF) and high-spatial frequency (HSF) surface errors in the grinding of fast aspheres are amplified in hard ceramics like silicon carbide due to cyclic tool wear rates, vibration, and tool deformation.

Posted in: Tech Briefs, Photonics, Briefs

Read More >>

Systems and Methods for Localized Surface Plasmon Resonance Sensing

This innovation uses an optical fiber having a metallic dot array on its tip, a light source coupled to the optical fiber via a light coupler, and a spectrometer coupled to the optical fiber via the coupler. Marshall Space Flight Center, Alabama Recently, there is widespread interest in the development of chemical and biochemical sensors based on plasmonic resonance of metallic nanostructures. In the localized surface plasmon resonance (LSPR) for nanometer-sized metallic structures, a resonant oscillation of the conduction electrons within the metallic nanostructures gives rise to an enhanced scattering and absorption of light. The LSPR sensing requires simpler instrumentation than surface plasmon resonance (SPR).

Posted in: Tech Briefs, Photonics, Briefs

Read More >>

Product of the Month: Fiber Optic Sensing System

The RTS125 from 4DSP (Austin, TX) is an off-the-shelf, distributed fiber optic sensing solution. With tens of thousands of strain or temperature sensors simultaneously monitored up to 100 times per second, the RTS125 offers the same sensing capabilities on up to eight channels as its predecessor, the RTS150, but in a lighter, ruggedized enclosure. This product delivers reliable measurements in the most demanding environments faced by the aerospace, automotive, civil engineering, and energy sectors among others.

Posted in: Products, Photonics

Read More >>

High-Power Laser Fiber Packaging

OSI Laser Diode, Inc. (LDI) (Edison, NJ), an OSI Systems Company, has introduced new packaging options for the CVD High Power Laser line. The innovative and compact package features coaxial cable construction, which permits a fiber option for lasers in a much smaller footprint than the standard TO5F housing. LDI’s new fiber coaxial packaging is available for 850 nm, 905 nm, and 1550 nm single-chip and stacked devices.

Posted in: Products, Photonics

Read More >>

Single Crystal Chemical Vapor Deposition Diamond

Element Six (Santa Clara, CA) recently announced that its high-purity single crystal chemical vapor deposition (CVD) diamond material has been proven for use in intracavity cooling of disc lasers and in development of the first ever tunable diamond Raman laser system. Element Six’s high-purity single crystal CVD diamond has the highest thermal conductivity of any material at room temperature (up to 2200 W/mK). Combined with low absorption coefficient at a number of key wavelengths, the material gave the University of Strathclyde the ability to demonstrate the first ever tunable, continuous-wave diamond raman laser. Furthermore, photonics and laser manufacturer M Squared Lasers recently leveraged Element Six’s CVD diamond in a patented technique as a key enabler in its Dragonfly semiconductor laser.

Posted in: Products, Photonics

Read More >>