Results 251 to 260 of about 520,939 (335)

A few-layer graphene nanomechanical resonator driven by multifrequency digital signals. [PDF]

Nat Commun
Zhang C, Lu H, Yang C, Zhang Y, Chen F, Yan Y, Moser J.   +6 more
europepmc   +1 more source

Characterization and Performance Analysis of Underwater Optical Time and Frequency Dissemination Link Based on Monte Carlo Simulation and Experimental Demonstration. [PDF]

Sensors (Basel)
Yuan Y, Liu H, Wang Z, Zhang H, Li X, Cui J, Yang Y.   +6 more
europepmc   +1 more source

White Rabbit in radio interferometry. [PDF]

Exp Astron (Dordr)
Boven EP, Koelemeij JCJ, van Tour C, Smets R, González Escudero R, van Langevelde HJ.   +5 more
europepmc   +1 more source

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Optical signal-to-noise ratio measurement by optical homodyne tomography

Optics Letters, 2006
An all-fiber optical homodyne tomography setup is introduced that measures the optical signal-to-noise ratio through reconstruction of the photon statistics. The scheme described has been conceived for applications to optical communications. In particular, the signal-to-noise ratio has been evaluated at lambda= 1.55 microm as a function of the received
MARTELLI, PAOLO, PIETRALUNGA, SILVIA MARIA, RANZANI, LEONARDO, R. SIANO, MARTINELLI, MARIO   +4 more
openaire   +5 more sources

Measuring the Optical Signal-to-Noise Ratio in Agile Optical Networks

OFC/NFOEC 2007 - 2007 Conference on Optical Fiber Communication and the National Fiber Optic Engineers Conference, 2007
We have proposed an improved OSNR measurement technique called optical polarization splitting based on the polarization-nulling method. The test results with Tellabs ultra high speed networks showed that the proposed technique could measure the OSNR accurately at all modulation formats even when the signal was significantly depolarized due to PMD and ...
Wolfgang Moench, Julia Larikova
openaire   +2 more sources

Optical signal-to-noise ratio monitoring using uncorrelated beat noise

IEEE Photonics Technology Letters, 2005
We propose and experimentally demonstrate a new technique for monitoring optical signal-to-noise ratio (OSNR). The noisy signal to be measured is split into two paths. With offset optical bandpass filters and balanced radio-frequency subtraction after detection, the signal is separated from the beat noise.
null Wei Chen, R.S. Tucker, null Xingwen Yi, W. Shieh, J.S. Evans   +4 more
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Optical Signal-to-Noise Ratio Estimation Using Reference Asynchronous Histograms

Journal of Lightwave Technology, 2009
This paper presents and experimentally demonstrates a novel method for the estimation of optical signal-to-noise ratio (OSNR) based on the comparison of an asynchronous histogram of the signal under analysis with a reference asynchronous histogram. The latter is acquired from the signal under analysis at a calibration stage.
Ruben S. Luis, AntÓnio Teixeira, Paulo Monteiro   +2 more
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Signal-to-noise ratio in optical heterodyne detection for Gaussian fields

Applied Optics, 1978
The signal-to-noise ratio of optical heterodyne detection is discussed for Gaussian fields. The ratio of the aperture radius a of the detector to the smallest spot size w(s) of the signal has serious effects on the SNR. The conditions that maximize the SNR are obtained for a given signal or local oscillator field.
T, Takenaka, K, Tanaka, O, Fukumitsu
openaire   +3 more sources

Uncorrelated beat noise measurement for optical signal-to-noise ratio monitoring

31st European Conference on Optical Communications (ECOC 2005), 2005
We present theoretical analysis and experimental demonstration of a new optical signal-to-noise ratio monitoring method using uncorrelated beat noise. The measurement errors are less than 0.6 dB in a 10 Gb/s system. (2 pages)
Wei Chen, R. Tucker, X. Yi, W. Shieh, J. Evans   +4 more
openaire   +2 more sources