scholarly journals Planar Ultrawideband Antenna with Photonically Controlled Notched Bands

2013 ◽  
Vol 2013 ◽  
pp. 1-6 ◽  
Author(s):  
Drasko Draskovic ◽  
Jean Raphaël Olivier Fernandez ◽  
César Briso Rodríguez
Keyword(s):  
Optical Fiber ◽  
Low Power ◽  
Frequency Response ◽  
Laser Diode ◽  
Near Infrared ◽  
Optical Switch ◽  
Monopole Antenna ◽  
Uwb Antenna ◽  
Design Concepts ◽  
5 Ghz

A design of a planar microstrip-fed ultrawideband (UWB) printed circular monopole antenna with optically controlled notched bands is presented. The proposed antenna is composed of a circular ultrawideband patch, with an etched T-shaped slot controlled by an integrated silicon switch. The slot modifies the frequency response of the antenna suppressing 3.5–5 GHz band when the switch is in open state. The optical switch is controlled by a low-power near-infrared (808 nm) laser diode, which causes the change in the frequency response of the antenna generating a frequency notch. This solution could be expanded to include several notches in the antenna frequency response achieving a fully reconfigurable UWB antenna. The antenna could be remotely controlled at large distances using optical fiber. The prototype antenna has been fully characterized to verify these design concepts.

scholarly journals All-Optical Reversible Logic Gates with Optically Controlled Bacteriorhodopsin Protein-Coated Microresonators

2012 ◽  
Vol 2012 ◽  
pp. 1-12 ◽  
Author(s):  
Sukhdev Roy ◽  
Purnima Sethi ◽  
Juraj Topolancik ◽  
Frank Vollmer
Keyword(s):  
Low Power ◽  
Power Control ◽  
Near Infrared ◽  
Optical Switch ◽  
Logic Gates ◽  
Single Mode ◽  
Practical Applications ◽  
Control Signals ◽  
All Optical ◽  
Reversible Logic Gates

We present designs of all-optical reversible gates, namely, Feynman, Toffoli, Peres, and Feynman double gates, with optically controlled microresonators. To demonstrate the applicability, a bacteriorhodopsin protein-coated silica microcavity in contact between two tapered single-mode fibers has been used as an all-optical switch. Low-power control signals (<200 μW) at 532 nm and at 405 nm control the conformational states of the protein to switch a near infrared signal laser beam at 1310 or 1550 nm. This configuration has been used as a template to design four-port tunable resonant coupler logic gates. The proposed designs are general and can be implemented in both fiber-optic and integrated-optic formats and with any other coated photosensitive material. Advantages of directed logic, high Q-factor, tunability, compactness, low-power control signals, high fan-out, and flexibility of cascading switches in 2D/3D architectures to form circuits make the designs promising for practical applications.

A Low-Power Integrating and Sampling Demodulator for 3-5 GHz IR-UWB Applications

2021 ◽  
Author(s):  
Daniel Schrufer ◽  
Jurgen Rober ◽  
Artur Schwarzkopf ◽  
Thomas Rabenstein ◽  
Timo Mai ◽  
...  
Keyword(s):  
Low Power ◽  
Uwb Applications ◽  
5 Ghz

A Multiplexed Optical Fiber Sensor System For Distributed Measurement Of Structural Strains

1997 ◽  
Vol 503 ◽  
Author(s):  
F. Ansari ◽  
Z. Chen ◽  
Q. Li
Keyword(s):  
Optical Fiber ◽  
Optical Switch ◽  
Optical Fiber Sensor ◽  
Fiber Material ◽  
Smart Structure ◽  
Sensor System ◽  
Fiber Sensor ◽  
Fiber Sensors ◽  
Large Structures ◽  
Distributed Measurement

ABSTRACTStructurally integrated optical fiber sensors form the basis for smart structure technology. Over the past decade a variety of sensor configurations have been developed for measurement of strains and deformations in structures. Strains and deformations alter the refractive index and the geometry of the optical fiber material. These changes perturb the intensity, phase, and polarization of the light-wave propagating along the probing fiber. The optical perturbations are detected for the determination of strain. The research presented here describes the development of a new optical fiber sensor system for measurement of structural strains based on white light interferometry. An optical switch provides for multiplexing of strain signals from various locations in the structure. Redundant Bragg grating type fiber optic sensors as well as strain gauges were employed for comparison and verification of strain signals as measured by the new system. The system provides capability for distributed sensing of strains in large structures.

Design and analysis of Y-branched polymeric digital optical switch with low power consumption

2013 ◽  
Vol 296 ◽  
pp. 53-56 ◽  
Author(s):  
Fengxian Qiu ◽  
Jinhua Liu ◽  
Guorong Cao ◽  
Yijun Guan ◽  
Qiang Shen ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
Optical Switch ◽  
Low Power Consumption

scholarly journals Towards white-light generation through upconversion of low-power near-infrared photons

RSC Advances ◽  
2017 ◽  
Vol 7 (26) ◽  
pp. 16126-16130 ◽  
Author(s):  
Oleg P. Dimitriev ◽  
Julia L. Bricks ◽  
Anna L. Smirnova ◽  
Yuri L. Slominskii
Keyword(s):  
Low Power ◽  
Infrared Absorption ◽  
White Light ◽  
Near Infrared ◽  
Dye Molecules ◽  
White Light Generation ◽  
Light Generation

A broadband upconverted emission combined with a broadband infrared absorption takes place in films composed of the same infrared dye molecules.

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