Results 281 to 290 of about 520,939 (335)

Optical signal to noise ratio monitoring using a noval optical notch filtering scheme

2012 Photonics Global Conference (PGC), 2012
In this paper, we propose a novel optical notch filtering scheme, which can be used for optical signal to noise ratio (OSNR) monitoring. OSNR monitoring for 10-Gb/s and 40-Gb/s NRZ-OOK, NRZ-DPSK and Duo-binary signals are demonstrated in VPI transmission maker 7.6.
null Yi Yu, null Jing Yang, null Changyuan Yu   +2 more
openaire   +1 more source

Controlling the signal-to-noise ratio in optical parametric image amplification

Journal of Optics B: Quantum and Semiclassical Optics, 2003
We analyse a scheme for phase-sensitive amplification of an optical image without using Fourier-transforming lenses, as carried out in a recent experiment. Our analysis shows that the scheme works well with a broadband amplifier, which ensures that the output image is a faithful copy of the object.
WANG KG, YANG GJ, GATTIA A, LUGIATO, LUIGI   +3 more
openaire   +3 more sources

Filling Factor and Signal‐to‐Noise Ratios in Optical Interferometric Arrays

Publications of the Astronomical Society of the Pacific, 1999
Signal-to-noise ratios are derived for an interferometric array of N diffraction-limited optical/IR telescopes with a Fizeau-type beam recombination. We consider two types of objects—extended sources and point sources—and three sources of noise—signal photon noise, sky background noise, and detector noise.
François Roddier, Stephen T. Ridgway
openaire   +1 more source

Optical-signal-to-noise ratio monitoring for packet switched networks

31st European Conference on Optical Communications (ECOC 2005), 2005
We present the first experimental demonstration of direct optical-signal-noise-ratio (OSNR) monitoring on the packet basis. The OSNR monitoring error is found to be 0.6 dB in a dynamic range from 10 dB to 30 dB. (2 pages)
openaire   +1 more source

Optical signal-to-noise ratio monitoring based on four-wave mixing

Optical Engineering, 2015
The transmission rates of the next generation intelligent optical networks are high, and the use of dense wavelength division multiplexing and a reconfigurable optical add-drop multiplexer makes the traditional optical signal-to-noise ratio (OSNR) monitoring techniques unsuitable. Hence, we investigated the OSNR monitoring method based on the nonlinear
Mengchi Chen, Juanjuan Yang, Na Zhang, Shanhong You   +3 more
openaire   +1 more source

Visibility Signal to Noise Ratio in Adaptive Optics Two-Telescope Interferometry

Adaptive Optics, 1995
The study of astronomical objects requires the use of very high resolution instruments. Since it is difficult to build monolithic telescopes much larger than 10 meters in diameter, one can use long baseline interferometers1,2 that combine the optical beam of several telescopes.
Jean-Marc Conan, Gérard Rousset
openaire   +1 more source

Signal-to-noise ratio in optical matched filtering using a thermoplastic filter

Applied Optics, 1988
Effet de la non linearite de l'enregistrement thermoplastique sur la realisation d'un filtre adapte ...
openaire   +2 more sources

Signal-to-noise ratio for magneto-optic readout from quadrilayer structures

Applied Physics Letters, 1983
We present an experimental investigation of our earlier theoretical predictions regarding the signal-to-noise ratio for magneto-optic readout from quadrilayer structures in a differential detection scheme. Using quadrilayer structures employing amorphous Tb-Fe alloys as the magnetic material, quartz as the dielectric material, and aluminum as the ...
G. A. N. Connell, D. Treves, R. Allen, M. Mansuripur   +3 more
openaire   +1 more source

Signal-to-noise ratio analysis of all-fiber common-path optical coherence tomography

Applied Optics, 2008
We present theoretical analysis and experimental verification of the signal to noise ratio (SNR) of a common-path interferometer-based optical coherence tomography (OCT) system. Based on fully integrated all-fiber implementation of a common-path time-domain OCT system, we derived the SNR of the system including the effect of beat noise, which turns out
Xiaolu, Li, Jae-Ho, Han, Xuan, Liu, Jin U, Kang   +3 more
openaire   +2 more sources

Multiwavelength Coherent Brillouin Random Fiber Laser With Ultrahigh Optical Signal-to-Noise Ratio

IEEE Journal of Selected Topics in Quantum Electronics, 2018
Liang Zhang, Yanping Xu, Song Gao, B. Saxena, Liang Chen, X. Bao   +5 more
semanticscholar   +1 more source