Optical Reflection Interference Equalization for Single-Wavelength Bidirectional WDM-PON Transmission System

Shibita, Sho; Hisano, Daisuke; Maruta, Kazuki; Nakayama, Yu; Mishina, Ken; Maruta, Akihiro

doi:10.1109/jphot.2020.3045049

Cited by 9 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In bi-directional fiber links, multipath interference and Rayleigh back scattering can result in performance degradations. For a more detailed discussion and potential solutions, we refer to [38], [39].…”

Section: Colorless Coherent Tdm-pon Architecturementioning

confidence: 99%

Colorless Coherent TDM-PON Based on a Frequency-Comb Laser

Adib

Füllner

Kemal

et al. 2022

J. Lightwave Technol.

View full text Add to dashboard Cite

Coherent reception becomes an interesting option when data rates in time-division-multiplexed (TDM) passive optical networks (PONs) grow beyond 50 Gbit/s. Controlling the wavelength, i.e., the optical frequency, and the phase of the laser acting as local oscillator (LO) is one of the main technical challenges in the design of coherent TDM PONs. In the optical network units (ONUs), low-cost lasers are required, which come at the expense of wavelength variations and drifts over multiple nanometers due to fabrication imperfections, and temperature variations. This contradicts the requirement of wavelength-stable LOs in coherent receivers. The use of a wavelength locker circuit and a temperature controller is considered as too complex for applications in access networks. In this work, we propose a novel colorless coherent architecture with high resilience to ONU laser wavelength drifts of up to ±4 nm (±0.5 THz) for future 100 Gbit/s PON. It allows the use of distributed feedback lasers at the ONU side. This is rendered possible by generating a frequency comb with carefully chosen free spectral range in a quantum-dash mode-locked laser diode at the optical line terminal. In upstream operation, the frequency comb serves as an LO, whereas the same information is modulated onto all comb lines for the case of downstream. As a result, the ONU laser can drift over the entire comb bandwidth without substantial performance penalty. We experimentally demonstrate downstream and upstream operation with an aggregated raw data rate of 96 Gbit/s, respectively. We further introduce advanced digital signal processing (DSP) methods including a coarse frequency offset compensation (CFOC) and a multiple-input multiple-output (MIMO) equalizer to improve the performance of our concept. We Manuscript

show abstract

Section: Colorless Coherent Tdm-pon Architecturementioning

confidence: 99%

Colorless Coherent TDM-PON Based on a Frequency-Comb Laser

Adib

Füllner

Kemal

et al. 2022

J. Lightwave Technol.

View full text Add to dashboard Cite

show abstract

“…represents the generating function of the A and B layers in the I network [5]. The intra-layer structure is a random network with the same average degree.…”

Section: B I B I a I B I A I A I B I B I A I B I B I Amentioning

confidence: 99%

The Algorithm Accuracy of Mathematical Model to Improve the Transmission Speed of E-commerce Platform

Shatat

2022

Applied Mathematics and Nonlinear Sciences

View full text Add to dashboard Cite

After the input signal of e-commerce network information enters the network, it will inevitably be polluted by network delay. There is an error between the network output signal obtained by the receiver and the input signal of the transmitter. We combine control combination algorithms with mathematical models. And the power spectral density function is introduced into the signal transmission mathematical model of the e-commerce platform. Experiments prove that the new model is closer to the transmission efficiency change of the actual network communication signal than the traditional model.

show abstract