A novel low-loss quartz optical filter
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1.
Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Institute of Laser Research, Qufu Normal University, Qufu 273165, China;
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2.
Shandong Provincial Key Laboratory of Laser Polarization and Information Technology, Department of Physics, Qufu Normal University, Qufu 273165, China
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Corresponding author:
WU Fu-quan, fqwu@mail.qfnu.edu.cn
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Received Date:
2010-01-05
Accepted Date:
2010-04-14
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Abstract
In order to improve the transmission of the output light and reduce the sideband energy with almost the same main intensity,a novel filter based on optical rotatory dispersion effect was introduced.Starting from its principle,its characteristics were analyzed.Compared with a multistage quartz crystal filter,the primary improvement of the novel filter was to reduce the number of needed polariscopes.Compared with a three-level quartz ciystal optical filter,the structure and filtering characteristics of the novel filter were analyzed taking different loss into account.The filtering characteristics were measured with a spectrophotometer.The results show that this novel filter can reduce the loss of the output light and the second sideband energy obviously,which is useful for the observation spectrum.
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