A differential phase extracting method based on self-copy-shift for distributed acoustic sensing is proposed.Heterodyne and optical hybrids are used to realize
We investigate femtosecond laser trapping dynamics of two-photon absorbing hollow-core nanoparticles with different volume fractions and two-photon absorption (
We propose a photonic-assisted single system for measuring the frequency and phase noise of microwave signals in a large spectral range.Both the frequency and p