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- W1967732020 abstract "We report wavelength shifting (generation of a pulse at the wavelength (lambda) <SUB>p</SUB> - (Delta) (lambda) from a signal at (lambda) <SUB>p</SUB> + (Delta) (lambda) under the action of a pump at (lambda) <SUB>p</SUB>) and parametric amplification through a cascaded second order process in a periodically poled lithium niobate crystal and also in an organic crystal N-(4-nitrophenyl)-L- prolinol (NPP). NPP could convert signal pulse (from 1.16 to 1.14 micrometer) with unit gain under the action of a pump pulse (at 1.15 micrometer) of peak intensity as low as 9 MW/cm<SUP>2</SUP>. In the limit of negligible conversion, where the cascading effect can be described through an effective (chi) <SUP>(3</SUP>), we derive for NPP(chi) <SUB>eff</SUB><SUP>(3</SUP>) approximately equals 2.4 X 10<SUP>-17</SUP> m<SUP>2</SUP>/V<SUP>2</SUP>, which is approximately 10<SUP>2</SUP> larger than (chi) <SUP>(3</SUP>) of conjugated polymers or semiconductors. In a 19 mm long PPLN sample, at (lambda) <SUB>p</SUB> equals 1.8 micrometer and (Delta) (lambda) as large as 60 nm, we could obtain unit gain with a pump intensity of 6 MW/cm<SUP>2</SUP>, while amplification by a factor of 10 requires 18 MW/cm<SUP>2</SUP>. We also present a theoretical comparison between frequency mixing and cascading." @default.
- W1967732020 created "2016-06-24" @default.
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- W1967732020 date "1999-04-28" @default.
- W1967732020 modified "2023-10-16" @default.
- W1967732020 title "<title>Second-order cascaded frequency shifting and signal amplification in organic and inorganic crystals</title>" @default.
- W1967732020 doi "https://doi.org/10.1117/12.347986" @default.
- W1967732020 hasPublicationYear "1999" @default.
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