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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 44, Iss. 2 — Jan. 10, 2005
  • pp: 190–196

Single-layer-coated beam splitters for the division-of-amplitude photopolarimeter

Rasheed M. A. Azzam and Faisal F. Sudradjat  »View Author Affiliations


Applied Optics, Vol. 44, Issue 2, pp. 190-196 (2005)
http://dx.doi.org/10.1364/AO.44.000190


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Abstract

A design procedure is presented for a near-optimal, single-layer-coated prism beam splitter that serves as the key optical element of the division-of-amplitude photopolarimeter (DOAP). For given film and substrate refractive indices, the angle of incidence and film thickness are selected such that the ellipsometric differential phase shifts in reflection and transmission Δr and Δt differ by ±π/2, and the normalized determinant of the instrument matrix is maximized. The best results are obtained by using high-index films on low-index substrates. This is illustrated by examples of ZnS and GaP films on silica prisms in the visible and Si, Ge, and PbTe films on Irtran 1 substrates in the infrared. A 16° Si-prism DOAP beam splitter at the 1.55-μm lightwave-communications wavelength is also presented. It uses a 163-nm SiO2 coating on the entrance face to satisfy the optimum delta condition at 73° incidence, and the determinant of the instrument matrix is 78.23% of its theoretical maximum. The exit face of the Si prism is antireflection coated with a 208-nm Si3N4 film.

© 2005 Optical Society of America

OCIS Codes
(120.2130) Instrumentation, measurement, and metrology : Ellipsometry and polarimetry
(120.5410) Instrumentation, measurement, and metrology : Polarimetry
(230.1360) Optical devices : Beam splitters
(240.0310) Optics at surfaces : Thin films
(260.5430) Physical optics : Polarization

History
Original Manuscript: April 26, 2004
Revised Manuscript: September 28, 2004
Manuscript Accepted: September 29, 2004
Published: January 10, 2005

Citation
Rasheed M. A. Azzam and Faisal F. Sudradjat, "Single-layer-coated beam splitters for the division-of-amplitude photopolarimeter," Appl. Opt. 44, 190-196 (2005)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-44-2-190


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References

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