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8 results on '"Morbi A"'

1. DSP-Enabled Frequency Locking for Near-Nyquist Spectral Efficiency Superchannels utilizing Integrated Photonics

Author

Lee Dardis, Kenneth Weidner, Ales Kumpera, Scott Demars, Paul N. Freeman, Parmijit Samra, Alan C. Nilsson, Zulfikar Morbi, Jeffrey T. Rahn, Charles Chen, Christopher W. Berry, Mark Rice, Arseny Vasilyev, David Krause, Xian Xu, and Kevin Croussore

Subjects
Physics, business.industry, 02 engineering and technology, Spectral efficiency, 020210 optoelectronics & photonics, Baud, Optical signal to noise ratio, 0202 electrical engineering, electronic engineering, information engineering, Optoelectronics, Nyquist–Shannon sampling theorem, Photonics, business, Digital signal processing, Computer Science::Information Theory
Abstract

Digitally synthesized near-Nyquist subcarriers and photonic integration are shown to improve spectral efficiency. Spectral utilization 3.3% over baud rate is enabled by 1% Root-Raised-Cosine shaping and precision adjacent-channel wavelocking σ

Published
2018
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2. DSP-Enabled Frequency Locking for Near-Nyquist Spectral Efficiency Superchannels utilizing Integrated Photonics

Author

Rahn, Jeffrey, primary, Dardis, Lee, additional, Krause, David, additional, Rice, Mark, additional, Berry, Chris, additional, Kumpera, Aleš, additional, Nilsson, Alan, additional, Xu, Xian, additional, Croussore, Kevin, additional, Samra, Parmijit, additional, Weidner, Kenneth, additional, Morbi, Zulfikar, additional, DeMars, Scott, additional, Vasilyev, Arseny, additional, Chen, Charles, additional, and Freeman, Paul, additional

Published
2018
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3. Reliability of Un-Isolated ONU Upstream Lasers in the Face of Coherence Collapse – Feedback Regimes Due to Rayleigh Backscatter

Author

Charles Barker, Zulfikar Morbi, and Sudhesh Mysore

Subjects
Physics, Distributed feedback laser, Backscatter, business.industry, Laser, law.invention, symbols.namesake, Optics, law, Fiber laser, symbols, Upstream (networking), Rayleigh scattering, business, Tunable laser, Coherence (physics)
Abstract

“Coherence collapse” in un-isolated ONU lasers due to distributed Rayleigh backscatter is investigated and shown not to follow the classic T-C-feedback regimes. RIN and spectral degradation are measured; guidelines for acceptable PON performance are provided.

Published
2016
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4. SNR and BER Degradation of Upstream RFoG Signals Due to Accumulated RIN and Shot Noise of Off-State R-ONUs

Author

Z. Morbi and Sudhesh Mysore

Subjects
Physics, Optics, business.industry, Wavelength-division multiplexing, Quantum noise, Phase noise, Bit error rate, Electronic engineering, Shot noise, Upstream (networking), business, Degradation (telecommunications), Power (physics)
Abstract

Recent SCTE presentations have suggested that the SNR power penalties can be greater than 7dB for off-state R-ONU power levels of -30dBm. Our experimental and modeling results show power penalties far smaller than this.

Published
2012
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5. 32-Channel, Injection-Locked WDM-PON SFP Transceivers for Symmetric 1.25 Gbps Operation

Author

G. W. Pickrell, W. Y. Hwang, Y. Wang, M. Ho, H. L. Zhang, Z. Morbi, and K. A. Anselm

Subjects
Injection locking, Optical fiber, law, Computer science, Wavelength-division multiplexing, Electronic engineering, Channel (broadcasting), Transceiver, Laser, Adaptive optics, Injection locked, Passive optical network, law.invention
Abstract

A 32-channel, WDM-PON SFP transceiver is demonstrated at 1.25 Gbps with C-band transmit and L-band receive functionality. The transceiver is based on a wide-band, injection-locked Fabry-Perot laser. Both C-band and L-band SFP transceivers are available. 2010 Optical Society of America

Published
2011
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