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Short-pulse fiber lasers based on dissipative-soliton formation offer major performance and practical advantages over prior fiber lasers. Recent developments will be reviewed.
Programmable optical pulse shaping, allowing generation of nearly arbitrarily shaped ultrafast optical waveforms, is reviewed. After outlining the fundamentals, new directions in pulse shaping and selected applications are discussed.
We reveal THz nonlinearity of liquid water using intense monocycle THz pulse. Single THz pulse response and THz pump-probe spectroscopy show the breaking and recovering of hydrogen bonding network in water molecules.
15TW picosecond 10μm laser pulses are obtained at the UCLA Neptune Laboratory achieving record CO2 laser power. This peak power opens unique opportunities for applications in high-field experiments in the mid-IR range.
Time-frequency two-dimensional imaging of ultrashort laser pulses from 0.15 to 6 ps pulse duration has been successfully demonstrated in real-time, using a new autocorrelation scheme with a single echelon mirror.
We demonstrate synchronized few-cycle 800-nm and 2-μm pulse trains seeded from a single Ti:sapphire oscillator, able to generate scalable, high-energy pulses lasting less than a single electric-field cycle. Such pulses are attractive for high-field physics.
A simple scheme for generating 0.4 mJ 11.5 fs pulses at 1.8 μm is presented. Optical parametric amplified pulses were spectrally broadened in a hollow-core fiber and subsequently compressed by utilizing linear propagation through bulk material.
Long ring-cavity, all-polarization maintaining, Er-doped fiber laser using single wall carbon nanotube polyimide film was demonstrated. Output pulses with pulse energy of 0.7∼2.6 nJ were obtained at ultra low repetition rate of 943∼154 kHz.
Sub-20 fs deep-ultraviolet pulses were generated without a pulse compressor. Our approach allows one to compensate pulse broadening in air and glass appropriately and has a possibility of generating sub-7 fs pulses for ultrafast spectroscopy.
248 pJ and 322 fs ultrashort pulse was generated from cw beam using pulse trapping and Raman amplification by ultrashort soliton pulse in birefringent fibers. The physical mechanism and characteristics were also analyzed numerically.
We use a pulse-compression chirp-transform algorithm to generate broadband photonic arbitrary waveforms. A phase-locked loop frequency agile laser provides the needed broadband frequency scans. The experiment operates at the telecom wavelength of 1.5μm.
A diode-pumped mode-locking ceramic Yb:YAG laser with slope efficiency of 76% was demonstrated, output power up to 1.9 W was obtained with pulse duration of 418 fs and central wavelength of 1048 nm.
We experimentally investigate parametric downconversion approaching zero group velocity dispersion in Mg-doped stoichiometric LiTaO3. Pumping in the 820-842 nm range yields a 14 THz gain bandwidth with signal (idler) wavelengths around 1.23 μm (2.66 μm).
We mode-lock a fiber oscillator with cavity length of ~1500m using nanotubes, achieving 1.55ps pulses with pulse energy up to 63nJ at 134KHz repetition rate.
Green picosecond pulses with peak powers of more than 4W are generated by second harmonic generation in bulk PPLN. These power levels exceed all previous electrically triggerable green picosecond sources by an order of magnitude.
We introduce a theory for the interaction of multi-level atoms with well-stabilized pulse trains, which is general enough to take into account arbitrarily-shaped frequency combs. It is applied to the excitation of rubidium-87 atoms.
Generation of a stable train of picosecond pulses with 3.8 mJ energy at 400 Hz repetition rate and 200-μs train envelope from a pulsed diode pumped Nd:YAG laser with electro-optical negative feedback is presented.
Er-doped fiber laser optical frequency comb using fiber chirped pulse amplification technique was developed and fceo was locked stably. The longitudinal modes in generated supercontiuum were also examined by direct observation of beat signals.
The excitonic interaction in ZnSe/ZnMgSSe multiple quantum wells with intense terahertz pulses (~70 kV/cm) has been studied. Our results show a dynamical Stark effect on the excitonic absorption with a subpicosecond response time.
We demonstrate an all-fiber, 2-ps, 1063-nm source using time-lens compression of a continuous-wave laser, with variable repetition rates, pulse sequence, and alternating pulse amplitude. We demonstrate Cerenkov radiation in a higher-order-mode fiber using the source.
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