Characterization of the complex spatiotemporal dynamics of optical beam propagation in nonlinear multimode fibers requires the development of advanced measurement methods, capable of capturing the real-time evolution of beam images. We present a new space–time mapping technique, permitting the direct detection, with picosecond temporal resolution, of the intensity from repetitive laser pulses over a grid of spatial samples from a magnified image of the output beam. By using this time-resolved mapping, we provide, to the best of our knowledge, the first unambiguous experimental observation of instantaneous intrapulse nonlinear coupling processes among the modes of a graded index fiber.
3D time-domain beam mapping for studying nonlinear dynamics in multimode optical fibers / Leventoux, Y.; Granger, G.; Krupa, K.; Tonello, A.; Millot, G.; Ferraro, M.; Mangini, F.; Zitelli, M.; Wabnitz, S.; Février, S.; Couderc, V.. - In: OPTICS LETTERS. - ISSN 0146-9592. - 46:1(2021), pp. 66-69. [10.1364/OL.411868]
3D time-domain beam mapping for studying nonlinear dynamics in multimode optical fibers
Ferraro, M.;Mangini, F.;Zitelli, M.;Wabnitz, S.;
2021
Abstract
Characterization of the complex spatiotemporal dynamics of optical beam propagation in nonlinear multimode fibers requires the development of advanced measurement methods, capable of capturing the real-time evolution of beam images. We present a new space–time mapping technique, permitting the direct detection, with picosecond temporal resolution, of the intensity from repetitive laser pulses over a grid of spatial samples from a magnified image of the output beam. By using this time-resolved mapping, we provide, to the best of our knowledge, the first unambiguous experimental observation of instantaneous intrapulse nonlinear coupling processes among the modes of a graded index fiber.File | Dimensione | Formato | |
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