Zobrazeno 1 - 10
of 41
pro vyhledávání: '"77"'
Publikováno v:
SPIE Proceedings.
The strength of optical fiber at low temperature is an important parameter since it approximates the inert strength, i.e. the starting strength of the material before degradation by fatigue. Published data suggest that the fatigue may abruptly slow b
Autor:
Christian Vigneron
Publikováno v:
SPIE Proceedings.
The fundamental characteristics of analytical stereoplotters compared to the analog stereoplotters is their facility to use them and the versatility given by the on-line of a mini-computer. Analog stereoplotters, even those classified universal, are
Autor:
Christophe Laporte, Gilles Dambrine, Michel Maignan, Nourr Eddine Bourzgui, S. Delcourt, Jean-philippe Fraysse, Francois Danneville
Publikováno v:
SPIE Proceedings.
The main objectives of this work concerns the on-wafer high frequency noise measurements of low noise transistors (GaAs and InP HEMTs) at cryogenic temperature. We propose a new approach to de-embed the measured noise figure or noise power by taking
Publikováno v:
Smart Structures, Devices, and Systems.
The 77 GHz band has been reserved for intelligent cruise control in luxury cars and some public transport services in America and the United Kingdom. The Rotman lens offers a cheap and compact means to extend the single beam systems generally used, t
Publikováno v:
SPIE Proceedings.
The germanium (Ge) films of nanostructures deposited at 300 and 77 K by the cluster-beam evaporation technique are found to consist of small nanostructures. The crystal structure of the films is not the ordinary diamond but tetragonal structure. The
Autor:
Earle Stewart, Lamberto Raffaelli
Publikováno v:
SPIE Proceedings.
This paper examines markets, competing technologies and required production costs of 77 GHz automotive radars. The design and performance of a 77 GHz monolithic transmitter specifically developed for automotive collision avoidance and intelligent cru
Autor:
Richard I. Epstein, Mansoor Sheik-Bahae, Alexander R. Albrecht, Eric Lee, Junwei Meng, Azzurra Volpi, Markus P. Hehlen, Mohammadreza Ghasemkhani, Aram Gragossian
Publikováno v:
Tri-Technology Device Refrigeration (TTDR) III.
Optical refrigeration of rare-earth-doped solids has reached the boiling point of argon, 87 K, and is expected to cool to that of nitrogen, 77 K, in the near future. This technology is poised to pave the way to compact, reliable, and vibrationfree al
Autor:
Krishna C. Mandal, Michael Groza, Yunlong Cui, Sandeep K. Chaudhuri, Arnold Burger, Abhinav Mehta
Publikováno v:
SPIE Proceedings.
Synthesized amorphous selenium (a-Se) alloy materials have been characterized for room temperature high-energy nuclear radiation detector and x-ray detection applications. The alloy composition has been optimized to ensure good charge transport prope
Publikováno v:
SPIE Proceedings.
We developed a cryogenically cooled Yb:YAG laser as the pump beam for a pulsed Raman laser based on CVD grown diamond crystals. The Q-switched cryogenic Yb-doped YAG 1030 nm pump laser delivered 340 W at 40 kHz with diffraction-limited beam quality,
Publikováno v:
SPIE Proceedings.
Large-scale micro-electromechanical systems (MEMS) scanning mirrors play a primary role in many fields of manipulating light beam scanning, such as rapid optical spectrum analyzers (OSAs) based on dispersive gratings using in near infrared (NIR) regi