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Optics Letters

Optics Letters


  • Editor: Alan E. Willner
  • Vol. 33, Iss. 14 — Jul. 15, 2008
  • pp: 1554–1556

Polarizing beam splitter of deep-etched triangular-groove fused-silica gratings

Jiangjun Zheng, Changhe Zhou, Jijun Feng, and Bo Wang  »View Author Affiliations

Optics Letters, Vol. 33, Issue 14, pp. 1554-1556 (2008)

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We investigated the use of a deep-etched fused-silica grating with triangular-shaped grooves as a highly efficient polarizing beam splitter (PBS). A triangular-groove PBS grating is designed at a wavelength of 1550 nm to be used in optical communication. When it is illuminated in Littrow mounting, the transmitted TE- and TM-polarized waves are mainly diffracted in the minus-first and zeroth orders, respectively. The design condition is based on the average differences of the grating mode indices, which is verified by using rigorous coupled-wave analysis. The designed PBS grating is highly efficient over the C + L band range for both TE and TM polarizations ( > 97.68 % ) . It is shown that such a triangular-groove PBS grating can exhibit a higher diffraction efficiency, a larger extinction ratio, and less reflection loss than the binary-phase fused-silica PBS grating.

© 2008 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(060.4510) Fiber optics and optical communications : Optical communications
(230.1360) Optical devices : Beam splitters
(230.5440) Optical devices : Polarization-selective devices

ToC Category:
Diffraction and Gratings

Original Manuscript: April 10, 2008
Revised Manuscript: June 2, 2008
Manuscript Accepted: June 5, 2008
Published: July 7, 2008

Jiangjun Zheng, Changhe Zhou, Jijun Feng, and Bo Wang, "Polarizing beam splitter of deep-etched triangular-groove fused-silica gratings," Opt. Lett. 33, 1554-1556 (2008)

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