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Water-Soluble Quantum Dots for Multiphoton Fluorescence Imaging in Vivo
This work characterized water-soluble cadmium selenide–zinc sulfide quantum dots for multiphoton imaging in live animals and found no evidence of blinking (fluorescence intermittency) in solution on nanosecond to millisecond time scales.
In vivo three-photon microscopy of subcortical structures within an intact mouse brain
We demonstrate non-invasive, high-resolution, in vivo imaging of subcortical structures (the external capsule (EC) and hippocampus) within an intact mouse brain using three-photon fluorescence
Self-similar evolution of parabolic pulses in a laser.
Self-similar propagation of ultrashort, parabolic pulses in a laser resonator is observed theoretically and experimentally. This constitutes a new type of pulse shaping in mode-locked lasers: in
All-normal-dispersion femtosecond fiber laser.
We demonstrate a modelocked ytterbium (Yb)-doped fiber laser that is designed to have strong pulse-shaping based on spectral filtering of a highly-chirped pulse in the cavity. This laser generates
Electronic structure and optical properties of PbS and PbSe quantum dots
The electronic structure of spherical PbS and PbSe quantum dots is calculated with a four-band envelope-function formalism. This calculation accounts for both exciton energies and wave functions with
Properties of normal-dispersion femtosecond fiber lasers
We report a systematic study of all-normal-dispersion mode-locked fiber lasers. Spectral filtering of a chirped pulse in the cavity is a major component of the pulse shaping in these lasers. We
High‐energy femtosecond fiber lasers based on pulse propagation at normal dispersion
The generation and stable propagation of ultrashort optical pulses tend to be limited by accumulation of excessive nonlinear phase shifts. The limitations are particularly challenging in fiber‐based
All-normal-dispersion femtosecond fiber laser with pulse energy above 20 nJ.
Experimental results from Yb-doped fiber lasers agree with the trends of numerical simulations, and stable and self-starting pulses are generated with energies above 20 nJ, and these can be dechirped to <200 fs duration.
Dissipative solitons in normal-dispersion fiber lasers
Mode-locked fiber lasers in which pulse shaping is based on filtering of a frequency-chirped pulse are analyzed with the cubic-quintic Ginzburg-Landau equation. An exact analytical solution produces