{"title":"聚二乙炔晶体双光子吸收条件下的相位共轭","authors":"J. Nunzi, F. Charra","doi":"10.1088/0963-9659/7/3/012","DOIUrl":null,"url":null,"abstract":"Phase-conjugation experiments have been performed in a backward degenerate four-wave mixing geometry using 1064 nm picosecond light pulses in thick p-toluene sulphonate polydiacetylene crystals. Two-photon absorption is identified and characterized. The relevant propagation equations are resolved analytically in different experimental geometries. Nonlinear absorption cancels out all the phase-conjugate signal at light fluences. A time-dependent analysis of the effect in a pump and nonlinear-probe experiment reveals an excited-state-induced nonlinearity.","PeriodicalId":20787,"journal":{"name":"Pure and Applied Optics: Journal of The European Optical Society Part A","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"1998-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"PHASE CONJUGATION UNDER TWO-PHOTON ABSORPTION CONDITIONS IN POLYDIACETYLENE CRYSTALS\",\"authors\":\"J. Nunzi, F. Charra\",\"doi\":\"10.1088/0963-9659/7/3/012\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Phase-conjugation experiments have been performed in a backward degenerate four-wave mixing geometry using 1064 nm picosecond light pulses in thick p-toluene sulphonate polydiacetylene crystals. Two-photon absorption is identified and characterized. The relevant propagation equations are resolved analytically in different experimental geometries. Nonlinear absorption cancels out all the phase-conjugate signal at light fluences. A time-dependent analysis of the effect in a pump and nonlinear-probe experiment reveals an excited-state-induced nonlinearity.\",\"PeriodicalId\":20787,\"journal\":{\"name\":\"Pure and Applied Optics: Journal of The European Optical Society Part A\",\"volume\":null,\"pages\":null},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1998-05-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Pure and Applied Optics: Journal of The European Optical Society Part A\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1088/0963-9659/7/3/012\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Pure and Applied Optics: Journal of The European Optical Society Part A","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1088/0963-9659/7/3/012","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
PHASE CONJUGATION UNDER TWO-PHOTON ABSORPTION CONDITIONS IN POLYDIACETYLENE CRYSTALS
Phase-conjugation experiments have been performed in a backward degenerate four-wave mixing geometry using 1064 nm picosecond light pulses in thick p-toluene sulphonate polydiacetylene crystals. Two-photon absorption is identified and characterized. The relevant propagation equations are resolved analytically in different experimental geometries. Nonlinear absorption cancels out all the phase-conjugate signal at light fluences. A time-dependent analysis of the effect in a pump and nonlinear-probe experiment reveals an excited-state-induced nonlinearity.
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