Keyword: Radio frequency

Briefs: Photonics/Optics

Common-path heterodyne interferometers (COPHIs) have been proposed for measuring small variations in the heights of surfaces. A COPHI could be used, for example, to measure the deviation of the surface...

Briefs: Photonics/Optics

A single-laser-based, heterodyne optoelectronic system that measures the displacements of two targets along the same lines of sight has been developed. Heretofore, it would have been necessary...

Briefs: Photonics/Optics

A photonic system has been devised for acquiring a radio-frequency (RF) signal from a remote receiving antenna via a long optical fiber. The system performs multiple functions,...

Briefs: Photonics/Optics
Whispering-Gallery-Mode Microspheres as Light Modulators

Light modulators of a proposed type would exploit the propagation of lightin "whispering-gallery" electromagnetic modes in microspheres made of electro-optical materials. These modulators would offer advantages of ultrahigh modulation efficiency and increased bandwidth, relative to their...

Briefs: Motion Control

Technological advances have driven the evolution of aircraft flight-control systems. In the dawn of 20th-century aviation, the Wright Brothers used cables and warping of wing surfaces to change...

Briefs: Electronics & Computers

A proposed multilayer metal-film/dielectric-plate laminate would serve as a passive radio-frequency (RF) interlayer stripline transition. This device is designed to provide RF coupling from (a) an input...

Briefs: Electronics & Computers

This filter closely approximates the desired wave shape, regardless of the bit rate.

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