NASA Scientific and Technical Aerospace Reports

We have developed high-resolution Nb-Al-AlOx-Al-Nb tunnel junction extreme ultra-violet (EUV) detectors. In the
energy range between 25 and 70 eV, we have measured an energy resolution of 2.2 eV full-width at half maximum (FWHM).
The energy resolution degrades significantly in the energy range between (approx)80 and (approx)230 eV where the Nb
absorber is partially transparent and some of the photons are absorbed in the Al trap layers. We have for the first time observed
a distinctly different response for photons absorbed in the Nb and the Al layer of the same junction electrode. We have modeled
this effect with Monte-Carlo simulations of the charge generation process in superconducting multilayers.
NTIS
Extreme Ultraviolet Radiation; Ultraviolet Detectors; Superconductivity
20040047121 Research and Technology Organization, Neuilly-sur-Seine, France
Optics Microwave Interactions
April 2003; 170 pp.; In English; Optics Microwave Interactions, 2-3 Sep. 2002, Jouy en Josas, France; See also 20040047122
- 20040047132; Original contains color and black and white illustrations
Report No.(s): RTO-EN-028; AC/323(SET-058)TP/42; Copyright; Avail: CASI; C01, CD-ROM; A08, Hardcopy
The following reports were processed for inclusion into the NA&SD database:Microwave Photonics in Dual-Use Military
Systems - A Personal Perspective; Optoelectronic Components and Integrated Circuits Including Up and Down Conversion;
Technique and Hybrid Integration Technology; Optoelectronic Components and Integration Devices: From Concepts to
Applications; Wireless and Optics: A Survey and Overview of Broad Band Fiber-Fed Radio Systems; RF Photonics for
Beamforming and Array Applications; Optical Architectures for Signal Processing: Part A; Optical Architectures for Signal
Processing: Part B; Opto-Microwave Signal Processing: Up and Down Conversion Techniques; Fiber Optic Distribution
Networks for Military Applications; Novel Microwave Photonic Techniques in the Future Military Systems; and Optical
Beamforming Networks for Radars and Electronic Warfare Applications.
Derived from text
Photonics; Broadband; Electro-Optics
20040047123 Drexel Univ., Philadelphia, PA, USA
Novel Microwave Photonic Techniques in the Future Military Systems
Daryoush, Afshin S.; Optics Microwave Interactions; April 2003, pp. 8-1 - 8-17; In English; See also 20040047121;
Copyright; Avail: CASI; A03, Hardcopy
This paper reviews a number of novel applications of microwave photonic techniques in future military systems. One
category is light interactions with microwave devices and circuits, which has contributed to the beginning of microwave
photonics. The performance of HBT is the most attractive over FET and HEMT devices, due to its I-V dependence on high
bandwidth and optical sensitivity. Moreover, different techniques of optical ADC are reviewed and among them all-optical
ADC has the greatest promise of achieving high bit resolution. Microwave spectroscopy of biological tissues provides
opportunity to create tomographic images of brain and breast, which leads to low-cost and reliable health monitoring of
military personnel. A higher spatial resolution is obtained when a higher modulating frequency is employed. Finally, a new
microchip laser is developed to generate frequency agile sources at microwave photonics. Optical sources operating at a fixed
temperature will correspond to a beat signal, where a low phase noise beat signal is produced.
Author
Microwave Equipment; Optical Communication; Photonics
20040047124 Centre National de la Recherche Scientifique, Grenoble, France
Optical Architectures for Signal Processing, Part A
Cabon, B.; Optics Microwave Interactions; April 2003, pp. 5A-1 - 5A-9; In English; See also 20040047121; Copyright; Avail:
CASI; A02, Hardcopy
The progress achieved in performing optoelectronic components makes feasible the generation of microwave functions
using all-optical devices. In the first part of this presentation, the principle of microwave filtering using optical interferometers
is described for both optical coherent and non-coherent regimes. Optical components are addressed in terms of
microwave-optical S parameters. The experimental realization of filters using fibers or integrated optics is explained. In the
second part, the use of optoelectronic techniques to control microwave devices is presented. For example, optically controlled
switches and phase shifters can be useful for phased array antennas. Applications can be found also in the generation of
millimeterwaves, optical probing, new microwave wide band devices
Author
Integrated Optics; Microwave Frequencies
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