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CLC number: O484.4

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Received: 2005-06-28

Revision Accepted: 2006-01-04

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Journal of Zhejiang University SCIENCE A 2006 Vol.7 No.6 P.1037~1040

http://doi.org/10.1631/jzus.2006.A1037


Design of non-polarizing thin film edge filters


Author(s):  GU Pei-fu, ZHENG Zhen-rong

Affiliation(s):  State Key Laboratory of Modern Optical Instrumentation, Zhejiang University, Hangzhou 310027, China

Corresponding email(s):   gupeifu@zju.edu.cn

Key Words:  Thin film optics, Interference edge filters, Non-polarization design


GU Pei-fu, ZHENG Zhen-rong. Design of non-polarizing thin film edge filters[J]. Journal of Zhejiang University Science A, 2006, 7(6): 1037~1040.

@article{title="Design of non-polarizing thin film edge filters",
author="GU Pei-fu, ZHENG Zhen-rong",
journal="Journal of Zhejiang University Science A",
volume="7",
number="6",
pages="1037~1040",
year="2006",
publisher="Zhejiang University Press & Springer",
doi="10.1631/jzus.2006.A1037"
}

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%T Design of non-polarizing thin film edge filters
%A GU Pei-fu
%A ZHENG Zhen-rong
%J Journal of Zhejiang University SCIENCE A
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%@ 1673-565X
%D 2006
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.2006.A1037

TY - JOUR
T1 - Design of non-polarizing thin film edge filters
A1 - GU Pei-fu
A1 - ZHENG Zhen-rong
J0 - Journal of Zhejiang University Science A
VL - 7
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SP - 1037
EP - 1040
%@ 1673-565X
Y1 - 2006
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.2006.A1037


Abstract: 
The separation between s- and p-polarization components invariably affects thin film edge filters used for tilted incidence and is a difficult problem for many applications, especially for optical communication. This paper presents a novel design method to obtain edge filters with non-polarization at incidence angle of 45°. The polarization separation at 50% transmittance for a long-wave-pass filter and a short-wave-pass filter is 0.3 nm and 0.1 nm respectively. The design method is based on a broadband Fabry-Perot thin-film interference filter in which the higher or lower interference band at both sides of the main transmittance peak can be used for initial design of long-wave-pass filter or short-wave-pass filter and then can be refined to reduce the transmittance ripples. The spacer 2H2L2H or 2L2H2L of the filter is usually taken. Moreover, the method for expanding the bandwidth of rejection and transmission is explained. The bandwidth of 200 nm for both rejection region and transmission band is obtained at wavelength 1550 nm. In this way, the long-wave-pass and short-wave-pass edge filters with zero separation between two polarization components can easily be fabricated.

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Reference

[1] Gu, P.F., Bai, S.Y., Li, H.F., Zhang, Y.G., Liu, X., 2002. Design of DWDM thin-film interference filters. Acta Optica Sinica, 22(7):794-797 (in Chinese).

[2] Gu, P.F., Chen, H.X., Zhang, Y.G., Li, H.F., Liu, X., 2004. Wavelength-division multiplexed thin film filters used in tilted incident angles of light. Appl. Opt., 43(10):2066-2070.

[3] Macleod, H.A., 2001. Thin-Film Optical Filters, 3rd Ed. Institute of Physics Publishing, Bristol and Philadelphia, p.368-377.

[4] Nosu, K., Ishio, H., Hashimoto, K., 1979. Multireflection optical multi/demultiplexer using interference filters. Electron. Lett., 15:414-415.

[5] Thelen, A., 1980. Avoidance or enhancement of polarization in multilayers. J. Opt. Soc. Am., 70(1):118-121.

[6] Thelen, A., 1981. Nonpolarizing edge filters. J. Opt. Soc. Am., 71(3):309-314.

[7] Zhang, Y.G., Gu, P.F., Liu, X., Tang, J.F., 1999. Color-separation multilayer systems used for thin film transistor-liquid crystal display. Acta Optica Sinica, 19(6):791-794 (in Chinese).

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