Extreme wave dynamics in ultrashort fiber lasers

Conferencia invitada; IS-PALD 2015, Metz, France, November 4- 6, 2015; http://ispald.web2.ncku.edu.tw/We review recent experiments that demonstrate the existence of optical wave transients of unusually high amplitude in fiber lasers operated in the vicinity of mode locking. These transients are analyzed in the context of optical rogue wave formation, with an important role played by the constraints of ultrafast measurements. From these investigations, a universal rogue wave mechanism is highlighted, which results from the evolution of a chaotic bunch of pulses or sub-pulses, subjected to numerous inelastic collisions, while traveling round the laser cavity.Peer Reviewe

Passively mode-locked laser based on an ultra-large dispersion Yb-doped fiber

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Dual-comb laser system for time-resolved studies of fireballs in the MIR

We present a high power all-fiber dual-comb system suitable for time-resolved spectroscopy measurements in the mid-infrared to study explosion dynamics and detection of chemical species. (C) 2019 The Author(s)Defense Threat Reduction Agency [HDTRA 11710030]This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

Time-Resolved Dual Frequency Comb Spectroscopy for Broadband Multi-Species Detection in Laser-Induced Plasmas

We present the first results using time-resolved broadband dual-comb spectroscopy in a laser-induced plasma. Preliminary results identifying multiple species in a Nd magnet will be shown. (c) 2019 The Author(s)Air Force Office of Scientific Research [FA9550-15-1-0091]; Defense Threat Reduction Agency [HDTRA 11710030]; U.S. Department of Energy (DOE) by the Battelle Memorial Institute [DE-AC05-76RL01830]This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

Time-resolved dual-comb measurement of number density and temperature in a laser-induced plasma

We utilize time-resolved dual-comb spectroscopy to measure the temporal evolution of the population number densities and absorption excitation temperature of Fe in a laser-induced plasma. The spectra of three excited-state transitions of Fe around 533 nm are simultaneously measured at different time delays following laser ablation of a stainless steel sample. This Letter probes late-time behaviors of laser-induced ablation plumes during plasma cooling. The high spectral resolution and broad spectral coverage of the dual-comb technique, combined with the time-resolved measurement capability shown here, will aid in the characterization of laser induced plasmas, including species identification and molecule and particle formation that can occur at later times in the plasma evolution. (C) 2019 Optical Society of AmericaAir Force Office of Scientific Research (AFOSR) [FA9550-15-1-0091]; Defense Threat Reduction Agency (DTRA) [11710030]; National Science Foundation (NSF) [1206555]; Office of Defense Nuclear Nonproliferation (DNN); National Nuclear Security Administration (NNSA); U.S. Department of Energy (DOE) [DE-AC05-76RL01830]12 month embargo; published online: 10 July 2019This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

Time-Resolved Dual Frequency Comb Phase Spectroscopy of Laser-Induced Plasmas

We present the first results using time-resolved dual-comb phase spectroscopy in a laser-induced plasma. It can allow for simultaneous plasma characterization as well as multi-species detection and plasma characterization. (c) 2019 The Author(s)Air Force Office of Scientific Research [FA9550-15-1-0091]; Defense Threat Reduction Agency [HDTRA11710030]; U.S. Department of Energy (DOE) [DE-AC05-76RL01830]This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]

Characterization of a Laser-Induced Plasma Using Time-Resolved Dual-Frequency-Comb Spectroscopy

We characterize the dynamics of laser-induced plasmas using time-resolved dual-frequency-comb spectroscopy. The temporal evolution of plasma's temperature, population number density are estimated for multiple Fe transitions. (C) 2019 The Author(s)Air Force Office of Scientific Research [FA9550-15-1-0091]; Defense Threat Reduction Agency [HDTRA 11710030]; U.S. Department of Energy (DOE) [DE-AC05-76RL01830]This item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at [email protected]