Results 251 to 260 of about 96,571 (279)
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Narrowband tunable photonic notch filter
Optics Letters, 2009We propose a technique for realization of a high-contrast, tunable, low-insertion-loss notch filter using polarization selectivity of whispering-gallery-mode resonators. We demonstrate a 10 MHz filter with 5.5 dB insertion loss and 45.5 dB of in-band rejection. The measured rejection value is limited by the finite (3 kHz) linewidth of our laser.
A A, Savchenkov +5 more
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Far-ultraviolet astronomical narrowband imaging
Applied Optics, 2009We describe an all-reflective system for narrowband imaging suitable for imaging emission lines in the far ultraviolet. The system, which we call a monochromatic imager, combines a pupil plane grating monochromator with a telescope and camera to image a scene in one or more very narrow bands.
Timothy A, Cook +3 more
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Paediatric psoriasis – narrowband UVB treatment
Journal of the European Academy of Dermatology and Venereology, 2010AbstractNarrowband UV‐B is a safe and efficacious option for the treatment of adult psoriasis. However, the use of this therapy has been limited in children due to its long‐term carcinogenic potential. It has proven to be an adequate alternative in patients whose condition is refractory to topical treatment.Aims To evaluate the efficacy and short‐term
P, Zamberk +4 more
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Detection of known Narrowband Signals in Narrowband Noise
1988In the last three chapters we have been concerned with the detection of known signals which may be characterized as being low-pass signals. We did not put any explicit constraints on the known signal values s i , but required the noise components W i to be independent for i = 1,2,…,n. When the data are generated as samples of some continuous-time input
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Better narrowband spectral measurements
Mechanical Systems and Signal Processing, 2007Spectrum analysis based on traditional FFT techniques is a widely available, commonly understood and general purpose tool for use with mechanical systems. In applications such as system identification, modal analysis and rotating machinery signature analysis, relevant information content in signals is greatest near narrowband phenomena in the frequency
Jason F. Dahl, Craig C. Smith
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Narrowband multistatic ISAR imagery system
Proceedings. 2005 IEEE International Geoscience and Remote Sensing Symposium, 2005. IGARSS '05., 2005This article deals with the imagery of mobile targets by using a multistatic radar (several transmitters and one receiver). First, we develop an original multistatic algorithm based on spatio-temporal SAR methods. As the transmitted signal is narrowband and the central frequency is weak, the final resolutions of the image depend on two parameters: the ...
Ginolhac, Guillaume +2 more
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Narrowband process quantization
Proceedings DCC '95 Data Compression Conference, 2002Summary form only given, as follows. We introduce a technique of tracking and quantizing the complex envelope of a narrowband process, which is a continuous time Gauss-Markov process of arbitrary order. The narrowband process is modeled in a state space framework and several quantization schemes using the in-phase and the quadrature components of the ...
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Engineering Narrowband Biphotons
CLEO Pacific Rim Conference, 2018We describe quantum state engineering of narrowband biphotons in diverse degrees of freedom, including time frequency, polarization, and position momentum. These biphotons are produced from spontaneous four-wave mixing in atomic ensembles.
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Sensitive detection of narrowband pulses
Acta Astronautica, 1986Highly monochromatic signals, such as TV carriers, can be detected sensitively by using a narrow filter (b < or = 1 Hz) and performing power accumulation on its output. If instead a low-duty-cycle pulsed signal of the same total energy is present, the sensitivity of a square law device, followed by a thresholding operation (to eliminate most samples
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2000
This chapter discusses the design of impedance-matching circuits. It often is necessary to connect components or networks that have different impedances. If these components were to be indiscriminately connected, energy would be reflected between them, causing energy loss and other unwanted effects.
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This chapter discusses the design of impedance-matching circuits. It often is necessary to connect components or networks that have different impedances. If these components were to be indiscriminately connected, energy would be reflected between them, causing energy loss and other unwanted effects.
openaire +1 more source