Results 81 to 90 of about 131 (119)

Coherent Reflective PON architecture: can it be made compatible with TWDM-PON

39th European Conference and Exhibition on Optical Communication (ECOC 2013), 2013
We discuss the compatibility between reflective PON architectures and the recently defined TWDM-PON for NG-PON2. Focusing on the upstream, we experimentally demonstrate that, by using burst-mode coherent detection at OLT, reflective PON can achieve the specification target set for TWDM-PON, without requiring precise wavelength accuracy at ONU.
S. Straullu, BOSCO, GABRIELLA, F. Forghieri, GAUDINO, ROBERTO, FERRERO, Valter   +4 more
openaire   +2 more sources

Energy saving in TWDM(A) PONs: Challenges and opportunities

2013 15th International Conference on Transparent Optical Networks (ICTON), 2013
Time- and Wavelength-Division Multiplexed (Multiple Access) TWDM(A) PONs are currently under standardization by ITU-T. Energy efficient schemes proposed for TDM(A) PON can still be applied to TWDM(A) PON for the subset of Optical Network Units (ONUs) transmitting and receiving at the same wavelength.
VALCARENGHI, LUCA, Y. Yoshida, A. Maruta, CASTOLDI, Piero, Ken ichi Kitayama   +4 more
openaire   +2 more sources

50G TDM PON and 50G TWDM-PON, challenges on the migration from current PON technologies

Innovaction, 2023
As the demand for higher bandwidth and increased traffic requirements in access networks rises, the development of next-generation passive optical networks becomes crucial. Two potential solutions currently being explored are 50G TDM PON and 50G TWDM PON.
Rodrigues, Cláudio, Tavares, Ana, Campos, Francisco, Ventuzelos, João, Viveiros, Duarte, Rodrigues, Francisco, Teixeira, António   +6 more
openaire   +1 more source

DML based long reach TWDM-PON

International Photonics and OptoElectronics Meetings, 2014
In this paper, we present a review of our recent research results in the area of symmetric 40-Gb/s, long reach time and wavelength division multiplexed passive optical network (TWDM-PON) employing directly modulated lasers (DML).
Lilin Yi, Zhengxuan Li, Xiaodong Wang, Weisheng Hu   +3 more
openaire   +1 more source

Multiple wavelength load balancing in TWDM-PON

2015 Opto-Electronics and Communications Conference (OECC), 2015
We propose a load balancing algorithm to manage data transmission over multiple wavelengths in TWDM-PON. Each wavelength is controlled to be in the balanced load state or lightly-loaded state. Analysis and test demonstrate salient results.
null Dianbo Zhao, null Yuanqiu Luo, null Jianhe Gao, null Huafeng Lin   +3 more
openaire   +1 more source

User migration in Time and Wavelength Division Multiplexed PON (TWDM-PON)

2013 15th International Conference on Transparent Optical Networks (ICTON), 2013
Power consumption in our communication networks is increasing rapidly, making energy efficiency one of the key considerations in developing next generation passive optical networks state 2 (NG-PON2). Considering the fact that wavelength utilization is quite low for most of the time due to the bursty nature of the traffic and the fluctuation of the ...
Hongyang Yang, Weiqiang Sun, Jun Li, Weisheng Hu   +3 more
openaire   +1 more source

Optical Network Unit Design for TWDM-PON

International Photonics and Optoelectronics Meetings, 2012
We report our recent progresses on proposing a cost-effective time and wavelength division multiplexed passive optical network (TWDM-PON), especially on the design of the high performance and low cost optical network unit (ONU).
Lilin Yi, Zhengxuan Li, Yi Dong, Shilin Xiao, Weisheng Hu   +4 more
openaire   +1 more source

ONU transmit power levelling for TWDM-PONs

2014 12th International Conference on Optical Internet 2014 (COIN), 2014
In this paper, we investigate the required range of ONU transmit power levelling for TWDM-PONs based on the worst case inter-channel crosstalk analysis. To overcome the crosstalk impairment, an OLT-shared architecture of the ONU transmit power levelling and its operation rule is also proposed. Keywords—inter-channel crrostalk, power levelling, TWDM-
null Hark Yoo, null Young Sun Kim, null Dong Soo Lee, null Han Hyub Lee   +3 more
openaire   +1 more source

TWDM-PON: System, Standards and Key Technologies

Asia Communications and Photonics Conference 2014, 2014
As the successor of XG-PON, TWDM-PON can support smoothly migration and coexistence with GPON and XG-PON in the same ODN. The operation scheme, standard progress, key technologies, application scenarios and industrial status of TWDM-PON will be introduced in this paper.
Huafeng Lin, Dekun Liu, Yuanqiu Luo, Frank Effenberger, Ning Cheng   +4 more
openaire   +1 more source

Experimental Study of Type B Protection for TWDM-PON System

Optical Fiber Communication Conference, 2014
Protection switching time is important factors in TWDM-PON system for business application because it defines the service outage time when failure occurs. An experiment using TWDM-PON assumed 40G-PON system shows that the protection switching time is 25.7 ms.
Takashi Nishitani, Jun Mizuguchi, Hiroaki Mukai   +2 more
openaire   +1 more source