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Multiple input detection and digital signal processing for uncooled ONUs in a TWDM-PON with a commercial WDM demultiplexer
Affiliation:1. School of Mobile Information Engineering, Sun Yat-sen University, Zhuhai 519082, China;2. Tsinghua National Laboratory for Information Science and Technology, Tsinghua University, Beijing, China;3. ZJU-SCNU Joint Research Center of Photonics, South China Normal University (SCNU), Guangzhou 510006, China;4. Department of Electronic and Information Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong;1. Universidad Autónoma de Nuevo León, Facultad de Ciencias Físico-Matemáticas, Av. Universidad S/N, Cd. Universitaria, San Nicolás de los Garza, C.P. 66451, Nuevo León, Mexico;2. Centro de Investigaciones en Óptica, A.C. Loma del Bosque 115, C.P. 37150 León, Guanajuato, Mexico;3. Centro de Investigación en Ingeniería y Ciencias Aplicadas, CIICAp, Universidad Autónoma del Estado de Morelos, UAEM, Av. Universidad No. 1001, Col. Chamilpa, C.P. 62209 Cuernavaca, Morelos, Mexico;1. Instituto Balseiro (CNEA – UNCuyo), Avenida Bustillo 9500, (8400) Bariloche, Argentina;2. Centro de Investigaciones Ópticas (CONICET La Plata – CIC), La Plata (1900), Argentina;3. Instituto de Tecnología, Facultad de Ingeniería y Ciencias Exactas, Universidad Argentina de la Empresa, Buenos Aires (C1073AAO), Argentina;1. College of Computer Science, Chongqing University, Chongqing 400044, PR China;2. School of Electronic and Information Engineering, Southwest University, Chongqing 400715, PR China
Abstract:A simple uplink transmission scheme with multiple-input direct detection and digital signal processing has been proposed and experimentally demonstrated for the time and wavelength division multiplexed passive optical networks (TWDM-PONs), to allow wavelength drift of lasers at the uncooled optical network units (ONUs). In our experiment, after passing by the commercial 100-GHz WDM demultiplexer, three 10-Gb/s NRZ signals with minimum signal wavelength separation of 50-GHz can be recovered successfully after 50-km standard single-mode fiber (SSMF) transmission. Simulation results are also obtained to analysis the receiver sensitivity at different wavelength separations and discuss methods improving power budget.
Keywords:Time and wavelength division multiplexed passive optical networks (TWDM-PONs)  Uncooled optical network units (ONUs)  Multiple-input detection  Digital signal processing
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