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The paper proposed a type of all-optical switch based on spatial-filter (AOSF), and a rule for this design. An analysis based on the present techniques used with lasers and photorefractive crystals indicated that there are no significant scientific or technical barriers for fabricating an AOSF. The response time of the proposed switch can reach 1ps, and the extinction ratio of the switch can reach 114:1 or higher. The AOSF can be used for measuring laser pulse contrast, taking a short section from a laser pulse, and improving pulse contrast or generating a short pulse from a long pulse.
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tang et al. (2024) studied this question.
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