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Applied Optics

Applied Optics


  • Editor: Joseph N. Mait
  • Vol. 49, Iss. 31 — Nov. 1, 2010
  • pp: 6024–6029

Impact of random angular jitter on fiber-coupled differential phase-shift keying receivers with Mach–Zehnder interferometer demodulation

Fang Zhao, Jing Ma, Siyuan Yu, Liying Tan, and Qiqi Han  »View Author Affiliations

Applied Optics, Vol. 49, Issue 31, pp. 6024-6029 (2010)

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In an optically preamplified differential phase-shift keying (DPSK) receiver with Mach–Zehnder interferometer (MZI) demodulation, it is essential to couple free space light into a single-mode fiber, by which the received optical signal can be guided into the amplifier and MZI. Random angular jitter has a profound impact on fiber coupling efficiency, in that it would significantly deteriorate the receiver performance. In this paper, the average bit error rate (BER) of fiber-coupled DPSK receivers is obtained in the presence of random angular jitter. It is shown that the degradation is significant when the random angular jitter normalized by the mode field radius is larger than 0.3. We further analyze the impact of other factors, including central obstruction and optical filter transfer functions. Our results show that the super-Gaussian filter outperforms other filters and leads to lower average BER at a fixed optical signal-to-noise ratio. This work can be used to improve the design of fiber-coupled DPSK receivers.

© 2010 Optical Society of America

OCIS Codes
(010.3310) Atmospheric and oceanic optics : Laser beam transmission
(060.2430) Fiber optics and optical communications : Fibers, single-mode
(260.3160) Physical optics : Interference
(060.2605) Fiber optics and optical communications : Free-space optical communication

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: July 26, 2010
Manuscript Accepted: September 14, 2010
Published: October 26, 2010

Fang Zhao, Jing Ma, Siyuan Yu, Liying Tan, and Qiqi Han, "Impact of random angular jitter on fiber-coupled differential phase-shift keying receivers with Mach–Zehnder interferometer demodulation," Appl. Opt. 49, 6024-6029 (2010)

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