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《Chinese Journal of Lasers》 1990-01
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Study of a measurement system for high extinction ratio

Li Guohua, Zhao Mingshan, Wu Fuquan, Hu Qingyun (Qufu Teachers, University, Qufu)  
A measurement system for high extinction ratio is reported. Several key technical problems in the measurement of extinction ratio are overcome and extinction ratio of less than 10-9 can be measured by means of this system.
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