Effect of relative phase noise on performance of coherent optical communication systems
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Received Date:
2014-09-15
Accepted Date:
2014-10-22
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Abstract
In a coherent optical orthogonal frequency-division multiplexing transmission system with forward-pumped Raman amplification, the interplay between Raman pump relative intensity noise and cross-phase modulation leads to relative phase noise inducing non-negligible performance degradation. In order to solve this problem, by numerical analysis, theoretical analysis and experimental verification, effect of relative phase noise on the performance of a coherent optical communication system under different modulation formats was analyzed. The performance of a single-carrier orthogonal frequency division multiplexed system under the same conditions was compared with that of a multi-carrier system. The extent of system damage caused by relative phase noise was gotten. The results show that the relatively larger walk-off between pump and signal helps to suppress the impairment induced by the relative phase noise. A higher-order modulated signal is less tolerant to relative phase noise than a lower-order signal. With the same spectral efficiency, the quadrature-amplitude modulation format shows better tolerance to relative phase noise than phase-shift keying.
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References
[1]
|
LI A, AMIN A A, CHEN X, et al. Transmission of 107Gb/s mode and polarization multiplexed CO-OFDM signal over a two-mode fiber[J]. Optics Express, 2011, 19(9):8808-8814. |
[2]
|
LONG Q Y,DENG H Q,CUI D L. Effect of pump power deployment on bi-directional pumping fibre Raman amplifiers[J]. Laser Technology, 2014, 37(2):216-218(in Chinese). |
[3]
|
CHENG J C, TANG M, FU S N, et al. Relative phase noise induced impairment in M-ary phase-shift-keying coherent optical communication system using distributed fiber Raman amplifier[J]. Optics Letters, 2013, 38(7):1055-1057. |
[4]
|
LIU B, XIN X, ZHANG L, et al. A WDM-OFDM-PON architecture with centralized lightwave and PolSK-modulated multicast overlay[J]. Optics Express, 2010,18(3):2137-2143. |
[5]
|
FENG S C, LU S H, PENG W J, et al. Photonic generation of microwave signal using a dual-wavelength erbium-doped fiber ring laser with CMFBG filter and saturable absorber[J]. Optics and Laser Technology, 2013, 45(2):32-36. |
[6]
|
YI X, WILLIAM S, TANG Y. Phase estimation for coherent optical OFDM[J]. IEEE Photonics Technology Letters, 2007, 19(9):919-921. |
[7]
|
YANG C, YANG F, WANG Z. Phase noise suppression for coherent optical block transmission systems:a unified framework[J]. Optics Express, 2011,19(18):17013-17020. |
[8]
|
CHENG J C, TANG M, FU S N, et al. Relative phase noise estimation and mitigation in Raman amplified coherent optical communication system[J]. Optics Express,2014,22(2):1257-1266. |
[9]
|
ZHANG P, TANG M, GAO F, et al. Cascaded fiber-optic Fabry-Perot interferometers with vernier effect for highly sensitive measurement of axial strain and magnetic field[J]. Optics Express, 2014, 22(16), 19581-19588. |
[10]
|
CAO X. Optimization of dispersion compensation in optical fiber communication systems[J]. Laser Technology, 2014, 38(1):101-104(in Chinese). |
[11]
|
ZHOU X, LONG K, LI R,et al. A simple and efficient frequency offset estimation algorithm for high-speed coherent optical OFDM systems[J]. Optics Express, 2012, 20(7):7350-7361. |
[12]
|
LIU J H, LI Zh L, LIANG M. Effects of laser phase noise on the performance of optical coherent receivers[J]. Optoelectronics Letters, 2012,8(3):193-196. |
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Proportional views
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