Suppression of optical beat interference-noise in orthogonal frequency division multiple access-passive optical network link using self-homodyne balanced detection |
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| Institution: | 1. Yonsei Institute of Convergence Technology, Yonsei University, Incheon 406-840, Republic of Korea;2. The Department of Electrical and Electronic Engineering, Yonsei University, Seoul 120-749, Republic of Korea;1. College of Applied Sciences, Beijing University of Technology, Beijing 100124, China;2. College of Science, Beijing University of Chemical Technology, Beijing 100029, China;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. State Key Laboratory of Information Photonics and Optical Communications (Beijing University of Posts and Telecommunications), P.O. Box163 (BUPT), 100876 Beijing, China;2. Photonics Research Center, School of Electronic and Communications Engineering, Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland |
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| Abstract: | A new technique, which reduces optical beat interference (OBI) noise in orthogonal frequency division multiple access-passive optical network (OFDMA-PON) links, is proposed. A self-homodyne balanced detection, which uses a single laser for the optical line terminal (OLT) as well as for the optical network unit (ONU), reduces OBI noise and also improves the signal to noise ratio (SNR) of the discrete multi-tone (DMT) signal. The proposed scheme is verified by transmitting quadrature phase shift keying (QPSK)-modulated DMT signal over a 20-km single mode fiber. The optical signal to noise ratio (OSNR), that is required for BER of 10−5, is reduced by 2 dB in the balanced detection compared with a single channel due to the cancellation of OBI noise in conjunction with the local laser. |
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| Keywords: | Balanced detection Optical beat interference Orthogonal frequency division multiple access Passive optical network Self-homodyne |
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