Optical power budget enhancement in next-generation DDO-OFDM-based optical access networks using square root module

Abstract

A passive optical network based on orthogonal frequency division multiplexing (OFDM-PON) gives improved performance for high speed optical access network due to its greater resistance to fiber dispersion and higher bandwidth efficiency. In optical fiber communication, chromatic dispersion (CD) is a linear distortion in fiber, but it is converted into nonlinear distortion due to square-law characteristic of photo diode detector at the receiver side resulting in degradation of performance. To compensate for this nonlinear distortion, we proposed to use a linearized receiver circuit with square root module (SRM) device which can improve the performance of system in terms of CD tolerance. In this paper, we have analytically analyzed the performance of OFDM-PON system with and without SRM device for direct-detection optical OFDM-PON (DDO-OFDM-PON) system. At BER of 10 −3 , which is the limit of forward error correction, there is 11.1 and 13.5 dB improvement in optical budget with SRM for downstream and upstream direction, respectively, as compared to conventional DDO-OFDM-PON system.

100 Gbps/λ C-Band CD Digital Pre-Compensated and Direct-Detection Links With Simple Non-Linear Compensation

“…In [17,18], a squareroot block (performed in the analog domain by using diodes) has been proposed in Radio-over-Fiber (RoF) system to experimentally show that it helped reduce harmonics at RX side. The square-root module has also been proposed in orthogonal frequency division multiplexing PON (OFDM-PON) system [19], where improvements in terms of optical power budget through simulations have been shown. In this paper, a 100 Gbps/λ C-band DD system using CD-DPC previously reported in [5] is used as a testbed, on top of which we experimentally show up to 3.3 dB gain (and up to 2.4 dB The square-root module has also been proposed in orthogonal frequency division multiplexing PON (OFDM-PON) system [19], where improvements in terms of optical power budget through simulations have been shown.…”

“…The square-root module has also been proposed in orthogonal frequency division multiplexing PON (OFDM-PON) system [19], where improvements in terms of optical power budget through simulations have been shown. In this paper, a 100 Gbps/λ C-band DD system using CD-DPC previously reported in [5] is used as a testbed, on top of which we experimentally show up to 3.3 dB gain (and up to 2.4 dB The square-root module has also been proposed in orthogonal frequency division multiplexing PON (OFDM-PON) system [19], where improvements in terms of optical power budget through simulations have been shown. In this paper, a 100 Gbps/λ C-band DD system using CD-DPC previously reported in [5] is used as a testbed, on top of which we experimentally show up to 3.3 dB gain (and up to 2.4 dB gain in simulations) thanks to the proposed simple receiver NLC (RXNLC).…”