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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 38, Iss. 14 — Jul. 15, 2013
  • pp: 2379–2381

SOI based ultracompact polarization insensitive filter for PDM signal processing

Lei Xiang, Yu Yu, Yaguang Qin, Jinghui Zou, Bingrong Zou, and Xinliang Zhang  »View Author Affiliations

Optics Letters, Vol. 38, Issue 14, pp. 2379-2381 (2013)

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We propose and fabricate a scheme that combines a two-dimensional (2D) grating coupler and a delay interferometer (DI) in a loop configuration. According to the polarization states, the 2D grating coupler first splits the input signals into two paths, which copropagate in the loop and share a common DI, and then combines the two paths together to the same input port. The proposed device is polarization insensitive and can be used for polarization division multiplexed (PDM) signal processing. For demonstration, the PDM non return-to-zero differential-phase-shift-keying signals can be demodulated successfully. The bit error ratio measurements show an error free operation, reflecting the good performance and the practicability of the proposed device.

© 2013 Optical Society of America

OCIS Codes
(060.0060) Fiber optics and optical communications : Fiber optics and optical communications
(130.3120) Integrated optics : Integrated optics devices

ToC Category:
Fiber Optics and Optical Communications

Original Manuscript: March 5, 2013
Revised Manuscript: June 10, 2013
Manuscript Accepted: June 10, 2013
Published: July 3, 2013

Lei Xiang, Yu Yu, Yaguang Qin, Jinghui Zou, Bingrong Zou, and Xinliang Zhang, "SOI based ultracompact polarization insensitive filter for PDM signal processing," Opt. Lett. 38, 2379-2381 (2013)

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