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Optical Engineering

Effect of an imperfect antireflection coating on a birefringent interleaver in an optical communications system
Author(s): Shuping Wang; Chi-Hao Cheng; Yangqing Lu; Charles Wong
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Paper Abstract

The effect of an imperfect antireflection (AR) coating on a birefringent interleaver (an important optical communication component) and on an optical communications system containing such a birefringent interleaver is investigated. We demonstrate how the imperfect AR coating on the rhomb surfaces affects the birefringent interleaver's intensity spectrum and generates undesirable chromatic dispersion (CD) ripples for an interleaver that should be dispersion-free by design. Our results show that a rhomb with a close-to-perfect AR surface coating (T=99.8%) can still generate a ±30-ps/nm CD ripple, causing a nonnegligible power penalty in an optical communications system. We also demonstrate a simple and practical approach to reduce the CD ripple caused by the imperfect AR coating.

Paper Details

Date Published: 1 September 2007
PDF: 5 pages
Opt. Eng. 46(9) 095005 doi: 10.1117/1.2783389
Published in: Optical Engineering Volume 46, Issue 9
Show Author Affiliations
Shuping Wang, The Univ. of North Texas Health Science Ctr. (United States)
Chi-Hao Cheng, Miami Univ. (United States)
Yangqing Lu, Nanjing Univ. (China)
Charles Wong, Radisys Corp. (United States)

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