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|Type:||Artigo de periódico|
|Title:||Achievement of lambda/4000 phase distortion sensitivity in the measurement of optical nonlinearities by using a modulated Z-scan technique|
|Abstract:||We report on a modulation detection system that efficiently improves the signal-to-noise ratio and the maximum achievable sensitivity of Z-scan measurements of purely optical nonlinearities. By using suitable signal processing electronics and combining an averaging procedure with the harmonic motion of the sample around the Z-scan lens focus position, we demonstrate an increase of the measurement sensitivity of more than one order of magnitude, which is in principle independent of the particular Z-scan set-up employed. The consequence is that nonlinear phase distortions of lambda/4000 can be easily measured and improvements up to lambda/10(5) are foreseen.|
third order optical nonlinearities
|Editor:||Iop Publishing Ltd|
|Appears in Collections:||Artigos e Materiais de Revistas Científicas - Unicamp|
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