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We demonstrate a spectrometer based on multiple interference and scattering in an ordinary frosted glass featuring random structures. The probe signal disperses through the frosted glass generating wavelength-dependent speckle patterns, which are detected by a charge coupled device chip and used to reconstruct the input spectrum after calibration. We consider an underdetermined system of linear equations...
We present a new technique for dispersion compensation with >105 fs2 range and kilohertz tuning speed, enabling high-speed focal plane scanning of two-photon excited fluorescence in a temporal focusing setup.
We discuss soliton-self frequency shift in higher-order-mode (HOM) fibers below 1300 nm. HOM fibers, with its higher tolerance to nonlinearities and engineerable dispersion characteristics, will enable tunable, energetic femtosecond sources at new wavelength regions.
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