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Optical Engineering

Impact of filter shape and bandwidth on terabit polarization-multiplexed quadrature phase-shift keying transmission with baud-rate spacing
Author(s): Xiaogang Yi; Yan Li; Jian Wu; Wei Li; Xiaobin Hong; Hongxiang Guo; Yong Zuo; Jintong Lin
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Paper Abstract

The impact of the optical multiplexing/demultiplexing filter on ultradense wavelength-division multiplexing transmission based on polarization-multiplexed quadrature phase-shift keying (PM-QPSK) modulation at the Nyquist spectral efficiency limit is studied through simulations. We analyze 10×111  Gbit/s PM-QPSK systems with baud-rate channel spacing for both back-to-back and long-haul nonlinear transmission cases. We show that, although a higher-order filter generally leads to better system performance at the optimal filter bandwidth, this benefit comes at the cost of reduced tolerance to variations in filter bandwidth and center-frequency shifts.

Paper Details

Date Published: 5 October 2012
PDF: 5 pages
Opt. Eng. 51(10) 105005 doi: 10.1117/1.OE.51.10.105005
Published in: Optical Engineering Volume 51, Issue 10
Show Author Affiliations
Xiaogang Yi, Beijing Univ. of Posts and Telecommunications (China)
Yan Li, Beijing Univ. of Posts and Telecommunications (China)
Jian Wu, Beijing Univ. of Posts and Telecommunications (China)
Wei Li, Beijing Univ. of Posts and Telecommunications (China)
Xiaobin Hong, Beijing Univ. of Posts and Telecommunications (China)
Hongxiang Guo, Beijing Univ. of Posts and Telecommunications (China)
Yong Zuo, Beijing Univ. of Posts and Telecommunications (China)
Jintong Lin, Beijing Univ. of Posts and Telecommunications (China)


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