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Applied Optics

Applied Optics


  • Vol. 43, Iss. 10 — Apr. 1, 2004
  • pp: 2066–2070

Wavelength-division multiplexed thin-film filters used in tilted incident angles of light

Peifu Gu, Haixing Chen, Yueguang Zhang, Haifeng Li, and Xu Liu  »View Author Affiliations

Applied Optics, Vol. 43, Issue 10, pp. 2066-2070 (2004)

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The properties of wavelength-division multiplexed (WDM) narrowband filters used in tilted collimated light are described. The wavelength shift for s polarization in a low-index-spacer filter is larger than that for p polarization when the filter is tilted, but it is smaller in a high-index-spacer filter. Therefore the passbands of the tilted filter can be centered at the same wavelength for two polarization modes by use of high- and low-index materials, as appropriate, as spacers or by selection of a moderate-index material instead of a spacer. With such spacers, WDM filters used for incident angles of 20° or even greater are constructed. Experimental results agree with the computed ones.

© 2004 Optical Society of America

OCIS Codes
(060.4510) Fiber optics and optical communications : Optical communications
(120.2440) Instrumentation, measurement, and metrology : Filters
(310.0310) Thin films : Thin films
(310.6860) Thin films : Thin films, optical properties
(350.2460) Other areas of optics : Filters, interference

Original Manuscript: October 24, 2003
Revised Manuscript: October 24, 2003
Published: April 1, 2004

Peifu Gu, Haixing Chen, Yueguang Zhang, Haifeng Li, and Xu Liu, "Wavelength-division multiplexed thin-film filters used in tilted incident angles of light," Appl. Opt. 43, 2066-2070 (2004)

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