Optoelectronics Letters, Volume. 8, Issue 3, 193(2012)

Effects of laser phase noise on the performance of optical coherent receivers

Ji-hong LIU*... Zhao-lin LI and Meng LIANG |Show fewer author(s)
Author Affiliations
  • School of Electrical Engineering, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
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    Laser phase noise (LPN) plays an important role in optical coherent systems. Based on the algorithm of Viterbi-Viterbi carrier phase estimation (CPE), the effects of LPN imposed on the coherent receivers are investigated for quadrature phase shift keying (QPSK), 8 phase shift keying (8PSK) and 16-quadrature amplitude modulation (16-QAM) optical coherent systems, respectively. The simulation results show that the optimal block length in the phase estimation algorithm is a tradeoff between LPN and additive white Gaussian noise (AWGN), and depends on the level of modulation formats. The resolution requirements of analog to digital converter (ADC) in the coherent receivers are independent of LPN or the level of modulation formats. For the bit error rate (BER) of 10-3, the required bit number of ADC is 6, and the gain is marginal for the higher resolution.

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    LIU Ji-hong, LI Zhao-lin, LIANG Meng. Effects of laser phase noise on the performance of optical coherent receivers[J]. Optoelectronics Letters, 2012, 8(3): 193

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    Paper Information

    Received: Dec. 25, 2011

    Accepted: --

    Published Online: Jul. 12, 2017

    The Author Email: Ji-hong LIU (ong1705@xupt.edu.cn)

    DOI:10.1007/s11801-012-1178-0

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