We demonstrate experimentally and theoretically that frequency-modulated femtosecond
laser pulses can be spectrally narrowed by self-phase modulation in optical fibers. We …

We propose and demonstrate a pulse compression technique using a hollow fiber with a
pressure gradient. This technique improves the spatial and spectral qualities of femtosecond …

We report the compression by a factor of 7 of 2-μJ pulses of 5-psec duration from a mode-
locked Nd: phosphate glass laser. The pulses were chirped and their spectrum broadened …

The pulse duration at the output of femtosecond lasers is usually close to the Fourier limit,
and can be shortened by increasing the spectral width. To this end, use is made of self …

The generation and stable propagation of ultrashort optical pulses tend to be limited by
accumulation of excessive nonlinear phase shifts. The limitations are particularly …

During the propagation of intense femtosecond laser pulses in a transparent medium, pulse
shortening can occur without external guiding. Experimental evidence for this effect and a …

We report the generation and measurement of an optical pulse only 30 fs (30 X 10-15 s) in
duration using optical compression techniques. This is the shortest optical laser pulse ever …

The current status of a fiber-based ultrafast technology is reviewed. Pulse generation
techniques capable of producing femtosecond pulses are discussed. Here we describe …

The use of self-phase modulation in a single-mode fiber to chirp an optical pulse, which is
then compressed with a grating-pair compressor, has been shown to be a practical …

Ultrafast femtosecond mode-locked fiber laser plays an indispensable role in medical
imaging, space ranging, ophthalmology, terahertz spectroscopy, material micromachining …