Results 261 to 270 of about 115,328 (285)

Asynchronous optical performance monitor techniques for DWDM optical networks

Proceedings of 2002 4th International Conference on Transparent Optical Networks (IEEE Cat. No.02EX551), 2003
The current techniques of optical system performance monitoring are described and characterized. From the available techniques, we focus our attention on the asynchronous Q method, and it is described and evaluated for several working conditions. This technique allows optical performance monitoring without synchronization, thus allowing the performance
A.L.J. Teixeira, P.S. Andre, M. Lima, J.F. da Rocha, J.L. Pinto   +4 more
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High-performance optical-fiber-nonlinearity-based optical waveform monitoring

Journal of Lightwave Technology, 2005
An all-optical waveform sampling system with simultaneous submilliwatt optical signal sensitivity (20-dB signal-to-noise ratio) and subpicosecond temporal resolution over more than 60-nm optical bandwidth is demonstrated in this paper. The optical sampling was implemented by four-wave mixing in a 10-m highly nonlinear fiber using a sampling pulse ...
M. Westlund, P.A. Andrekson, H. Sunnerud, J. Hansryd, null Jie Li   +4 more
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Optical performance monitoring techniques for high capacity optical networks

2010 7th International Symposium on Communication Systems, Networks & Digital Signal Processing (CSNDSP 2010), 2010
Optical performance monitoring is an important function for high capacity optical transmission system. In this paper, we summarize some of the recent work we have carried out in this area. In particular, PMD independent OSNR monitoring, OSNR monitoring using half symbol delay for SNR monitoring of RZ-DQPSK signal and signed residue dispersion ...
null Chao Lu, null Alan Pak Tao Lau, F. N. Khan, Qi Sui, null Jian Zhao, null Zhaohui Li, H Y Tam, P.K.A. Wai   +7 more
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Sensitivity issues of optical performance monitoring

IEEE Photonics Technology Letters, 2002
Optical performance monitoring is becoming an important network building block as the system becomes increasingly sophisticated and the network span becomes larger and larger. The general requirement for the optical performance monitor from the noise perspective is derived from the fundamental considerations of detector noises.
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Novel techniques for optical performance monitoring in optical systems

SPIE Proceedings, 2006
In this paper, different kinds of optical performance monitoring (OPM) techniques, in particular the optical signal-to-noise ratio (OSNR) monitoring and chromatic dispersion (CD) monitoring, are reviewed. Then recent trend of multiple-parameter simultaneous monitoring is examined.
Chun-Kit Chan, Yuen-Ching Ku, Lian-Kuan Chen   +2 more
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Review of optical performance monitoring techniques

2008 International Conference on Photonics in Switching, 2008
The optical performance monitoring technique is of critical importance for the future development of dynamic WDM networks. In this paper, we review its current status and future challenges.
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Real-time all-optical performance monitoring using optical bit-shape correlation

Applied Optics, 2009
A new optical performance monitoring technique of an optical link in real time is experimentally demonstrated. Rather than comparing bit streams or analyzing eye diagrams, we use a novel optical correlator to compare the shapes of the individual received bits to a standard. The all-optical correlator outputs a pulse whose strength directly measures the
Feras, Abou-Galala, Betty Lise, Anderson
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Convolutional Neural Networks for Optical Performance Monitoring

2019 IEEE Avionics and Vehicle Fiber-Optics and Photonics Conference (AVFOP), 2019
We demonstrate accurate OSNR estimation using convolutional neural networks based on the constellation image of a QAM signal. Simulation and experiment results demonstrate estimation error within 0.1 dB. Neural network training on simulated and successful testing on experimental data was also demonstrated.
Hyung Joon Cho, Daniel Lippiatt, Siddharth Varughese, Stephen E. Ralph   +3 more
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Performance degradations and monitoring in optical networks

SPIE Proceedings, 2004
nonlinearities [1]. Typically, systems are designed such that these degrading effects are eitherminimized or compensated (e.g., using compensation fibers and devices). It has been widelyrecognized that as domains of transparency get larger, data rates of 10 Gb/s and higher becomemore common, and channel spacings are reduced, physical impairments will ...
Alan E. Willner, S.M. Reza Motaghian Nezam, Zhongqi Pan, Qian Yu   +3 more
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Optical channel performance monitoring using coherent detection

OFC/NFOEC Technical Digest. Optical Fiber Communication Conference, 2005., 2005
We demonstrate a multi-functional optical system performance monitor using coherent heterodyne detection. In addition to performing high-resolution optical spectrum analyzing, the system is capable of monitoring chromatic dispersion and PMD at each wavelength channel.
null Biao Fu, null Rongqing Hui, D.L. Richards   +2 more
openaire   +1 more source