Zobrazeno 71 - 80
of 243
pro vyhledávání: '"77"'
Autor:
V. Dobrovolsky, N. Michailov, Fiodor F. Sizov, S. Dvoretskii, V. Zabudsky, N. Momot, Z. Tsybrii
Publikováno v:
SPIE Proceedings.
Direct detection mm/sub-mm wave warm-carrier bipolar narrow-gap Hg 1-x Cd x Te semiconductor bolometers that can be used as picture elements in THz sensitive arrays, are considered. The response of Hg 1-x Cd x Te warm-electron bolometers was measured
Publikováno v:
SPIE Proceedings.
We demonstrate pulse compression by generating nonlinear-dispersive similariton in fiber and its chirp cancellation in a dispersive delay line, consisting of a pair of fused-silica dispersive prisms. The initial pulse with 11 nm bandwidth and 146 fs
Publikováno v:
SPIE Proceedings.
MWIR photon detector in the mid-infrared wavelength (2-5 μm) range is developed using crystalline silicon carbide substrates. SiC, which is a wideband gap semiconductor, is laser-doped to create a dopant energy level corresponding to a quantum of en
Autor:
Michael Wojcik, Robert J. Foltynowicz
Publikováno v:
Optics and Photonics for Counterterrorism and Crime Fighting VI and Optical Materials in Defence Systems Technology VII.
A high output power, eye-safe, LIDAR transmitter based on a KTA optical parametric oscillator (OPO) was demonstrated. The OPO was based on a two crystal, NCPM, KTA ring cavity which was doubly resonant. A 7ns, 30Hz, flashlamp-pumped, Q-switched Nd:YA
Publikováno v:
SPIE Proceedings.
We realized a logical function of bit-to-bit parallel multiplication for optical echo-processor based on the third-order nonlinear optical response of a resonant medium at room temperature. As an operating medium we used the polyvinilbutural film dop
Publikováno v:
SPIE Proceedings.
We describe the design, construction and performance of a novel 180° hybrid power divider for L-band (1.3-1.8 GHz). The hybrid is based on a double ridged waveguide cavity that also integrates a band pass filter. The device will operate at 77 K insi
Autor:
Renzo Nesti, Tonino Pisanu, A. Orfei, G. Valente, P. Marongiu, Alessandro Navarrini, J. Roda, Pietro Bolli, S. Mariotti
Publikováno v:
SPIE Proceedings.
We present the design of the passive feed system of the dual-band receiver for the prime focus of the Sardinia Radio Telescope (SRT), a new 64 m diameter radio telescope which is being built in Sardinia, Italy. The feed system operates simultaneously
Publikováno v:
SPIE Proceedings.
In this contribution, we demonstrate white organic light-emitting diodes (OLEDs) with a top-emissive layer structure containing a cavity. Two highly efficient phosphorescent emitter materials ((Ir(MDQ) 2 (acac) and Ir(ppy) 3 ) are combined with the s
Autor:
Elena Plis, Arezou Khoshakhlagh, Stephen Myers, M. N. Kutty, Brianna Klein, Scott M. Johnson, David R. Rhiger, Sanjay Krishna, Ha Sul Kim, Nutan Gautam, Edward P. Smith
Publikováno v:
SPIE Proceedings.
The development of InAsSb detectors based on the nBn design for the mid-wave infrared (MWIR) spectral region is discussed. Comparisons of optical and electrical properties of InAsSb photodetectors with two different barrier material, namely, AlAs 0.1
Autor:
Keiichi Morichika, Jun Uemura, Hiroyasu Sato, Kota Yamada, Hirotaka Niikura, Tsuyoshi Hasegawa, Shigeto Kato, Kunio Sawaya, Jun Nakada, Masamune Takeda, Junichi Takahashi, Matsuzaki Tomohiko, Koji Mizuno, Hirai Haruyuki
Publikováno v:
SPIE Proceedings.
77 GHz passive millimeter wave (PMMW) imaging camera for the purpose of security is developed. In order to detect concealed objects in clothes without hindrance to flow of people at airport security checks, video rate imaging is realized using one-di