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- W4320803436 abstract "The creation of a high coherence source of frequency converted laser radiation, for example as required in multi-coloured pulsed holography, requires the use of forward Raman amplification in the Dicke narrowed line of hydrogen at low pressures (3 - 4 atm). However, the conversion efficiency of Raman amplifiers is usually not sufficient even at high pressure. Indeed, in order to address this problem previous workers have used deliberately matched spatial profiles of the pump and seed Stokes beams at 17 atm [1] and superregenerative Raman amplification [2]. In this article we report the experimental observation of forward Raman amplification in the Dicke narrowed line at an H 2 pressure of 4 atm with an energy conversion efficiency of up to 68 %, a value close to the theoretical limit of 78 %. given by the Manley-Rowe relation. As such a Stokes pulse (λ s - 674 nm) having an energy of ~ 0.7 J was achieved from only ~ 1 J of pump energy (λ L = 526 nm)." @default.
- W4320803436 created "2023-02-15" @default.
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- W4320803436 date "1996-01-01" @default.
- W4320803436 modified "2023-09-26" @default.
- W4320803436 title "High efficiency Raman amplification in the Dicke narrowed line of hydrogen" @default.
- W4320803436 doi "https://doi.org/10.1364/cleo_europe.1996.cwc5" @default.
- W4320803436 hasPublicationYear "1996" @default.
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