Jiayuan He
University of Melbourne
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Publication
Featured researches published by Jiayuan He.
Optics Express | 2013
Xi Chen; An Li; Di Che; Qian Hu; Yifei Wang; Jiayuan He; William Shieh
We propose phase switching for either main-carrier or subcarriers of two consecutive signal blocks to achieve fading-free double-sideband direct-detection (DD). In our demonstration, 40-Gb/s DD-OOFDM is successfully received over 80-km SSMF with single polarization and single detector.
Optics Express | 2013
Xi Chen; Di Che; An Li; Jiayuan He; William Shieh
We propose signal-carrier interleaved (SCI) optical OFDM for direct detected transmission systems. Such a scheme can be considered as a variation of self-coherent detection where the carrier and signal are supplied at the transmitter and extracted at the receiver for coherent-like detection. This provides high OSNR sensitivity while maintaining very low carrier-to-signal power ratio (CSR). Our experiment results show that with 0 dB CSR, 43.2 Gb/s 16 QAM OFDM signal can be successfully delivered over 80 km standard single mode fiber (SSMF) with 24 dB OSNR requirements at 7% FEC limit.
optical fiber communication conference | 2013
Xi Chen; Jiayuan He; An Li; Jia Ye; William Shieh
We employ coherent detection and digital signal processing to characterize dynamic evolution of channel matrix in two-mode fibers. Experimental results reveal that the evolution frequency of channel matrix can reach as fast as 4 kHz.
IEEE Photonics Technology Letters | 2013
Xi Chen; Jiayuan He; An Li; Jia Ye; William Shieh
We employ coherent detection and digital signal processing (DSP) to characterize the dynamic evolution of channel matrix in two-mode fibers (TMFs). We develop novel DSP algorithms to compute channel evolution frequency. We measure a few different fiber spools in the lab and find that the evolution frequency of TMF channel matrix can reach as fast as 25 kHz, and the channel of TMF evolves faster than that of single mode fiber.
Optics Express | 2012
Xi Chen; Jia Ye; Yue Xiao; An Li; Jiayuan He; Qian Hu; William Shieh
We demonstrate channel equalization of two-mode fiber based MIMO system using more receivers than transmitters. Specifically, the equalization performances are compared among three methods including zero-forcing (ZF), minimum-mean-square-error (MMSE), and successive-interference-cancellation (SIC).
Journal of Lightwave Technology | 2015
Xi Chen; Jiayuan He; Di Che; William Shieh
In this paper, we propose and demonstrate effective laser phase noise compensation for coherent optical orthogonal frequency-division multiplexing (OFDM) systems that have long OFDM symbols. The phase noise compensation is achieved via hybrid modulated multiband optical OFDM, aided by the digital filter bank technique. For this, one of the multiple subbands is modulated as discrete Fourier transform spread OFDM. Our experimental results show that laser phase noise up to 1 MHz can be compensated for 114.8-Gb/s 16-QAM signals with 480-km standard single mode fiber transmission.
Journal of Lightwave Technology | 2014
Jiayuan He; An Li; Xi Chen; William Shieh
We carry out comprehensive analysis on the fiber nonlinearity impact on the block-wise phase switching (BPS) direct detection (DD) systems. We find that the degenerate four-wave mixing components produced by the interaction between the main carrier and the subcarriers are intrinsically compensated through the direct detection process. For a 100-Gb/s BPS-DD system over 80-km standard single-mode-fiber link, the optimum launch power is found to be 5 dBm, and the optimum carrier-to-signal power ratio is 12 dB. For a single-channel BPS-DD system, the fiber nonlinearity impairment is reduced when low-dispersion fiber is used. However, for a multi-channel BPS-DD system, the nonlinearity noise induced by the crosstalk among the channels is enhanced when the chromatic dispersion of the fiber link decreases.
Journal of Lightwave Technology | 2014
Xi Chen; An Li; Qian Hu; Jiayuan He; Di Che; Yifei Wang; William Shieh
In this paper, we propose and demonstrate phase switching for either main carrier or subcarriers of two consecutive signal blocks to achieve fading-free double-sideband direct-detection. The proposed approach has twice of the electrical spectral efficiency (SE) of offset OFDM, and the same electrical SE as single-side band OFDM. We perform numerical simulation and verify the system robustness against polarization mode dispersion and laser phase noise. Our experimental results show that 40-Gb/s direct-detection OOFDM can be successfully delivered over 80-km SSMF with single polarization and single detector.
Asia Communications and Photonics Conference 2013 (2013), paper AF1E.2 | 2013
Xi Chen; Di Che; An Li; Jiayuan He; Yifei Wang; Qian Hu; William Shieh
We propose an algorithm for signal-to-signal-beat-noise (SSBN) cancellation in direct detection optical OFDM systems. Experimental results show that by using our proposed algorithm, the OSNR sensitivity can be improved by more than 8 dB.
optical fiber communication conference | 2013
Xi Chen; An Li; Di Che; Qian Hu; Yifei Wang; Jiayuan He; William Shieh