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Laser-pulse

In the previous section we discussed light and matter at equilibrium in a two-level quantum system. For the remainder of this section we will be interested in light and matter which are not at equilibrium. In particular, laser light is completely different from the thennal radiation described at the end of the previous section. In the first place, only one, or a small number of states of the field are occupied, in contrast with the Planck distribution of occupation numbers in thennal radiation. Second, the field state can have a precise phase-, in thennal radiation this phase is assumed to be random. If multiple field states are occupied in a laser they can have a precise phase relationship, something which is achieved in lasers by a teclmique called mode-locking Multiple frequencies with a precise phase relation give rise to laser pulses in time. Nanosecond experiments... [Pg.225]

The FVH representation allows us to visualize the results of more eomplieated laser pulse sequenees. A laser pulse whieh takes f from (0,0,-l) to (0,0,1) is ealled a ii-pulse sinee the f veetor preeesses ii radians about the field veetor. Similarly, a pulse whieh takes f from (0,0,-l) to (+1,0,0) is ealled a Ji/2-pulse. The state represented by tlie veetor (+1,0,0) is a eoherent superposition of tlie upper and lower states of the system. [Pg.232]

Assion A, Baumert T, Bergt M, Brixner T, Kiefer B, Seyfried V, Strehle M and Gerber G 1998 Control of chemical reactions by feedback-optimized phase-shaped femtosecond laser pulses Sc/e/ ce 282 919... [Pg.281]

Apparent non-RRKM dynamics has also been observed in time-resolved femtosecond (fs) experiments in a collision-free enviromnent [117], An experimental study of acetone illustrates this work. Acetone is dissociated to the CH and CH CO (acetyl) radicals by a fs laser pulse. The latter which dissociates by the channel... [Pg.1037]

In the present section, we concentrate on coherent preparation by irradiation with a properly chosen laser pulse during a given time interval. The quantum state at time t may be chosen to be the vibrational ground... [Pg.1059]

At still shorter time scales other techniques can be used to detenuiue excited-state lifetimes, but perhaps not as precisely. Streak cameras can be used to measure faster changes in light intensity. Probably the most iisellil teclmiques are pump-probe methods where one intense laser pulse is used to excite a sample and a weaker pulse, delayed by a known amount of time, is used to probe changes in absorption or other properties caused by the excitation. At short time scales the delay is readily adjusted by varying the path length travelled by the beams, letting the speed of light set the delay. [Pg.1124]

Yan Y X, Gamble E B and Nelson K A 1985 Impulsive stimulated Raman scattering general importance in femtosecond laser pulse interactions with matter, and spectroscopic applications J. Chem. Phys. 83 5391-9... [Pg.1230]

SFIG or SFG from a medium that has a strong response in a separate detection anu. By this means, one may fiilly compensate for variations not only in pulse energy, but also in the temporal and spatial substructure of the laser pulses. Some experiments may require measurement of the phase of the nonlinear signal [57]. [Pg.1281]

The quantities in this fomuila are defined as in equation Bl.5,32. but with the laser parameters translated into more convenient tenns is the average power at the indicated frequency is the laser pulse duration ... [Pg.1282]

Dadap J I, Hu X F, Russell N M, Ekerdt J G, Lowell J Kand Downer M C 1995 Analysis of second-harmonic generation by unamplified, high-repetition-rate, ultrashort laser pulses at Si(OOI) interfaces/ J. Selected Topics Quantum Electron 1 1145-55... [Pg.1302]

Time-resolved fluorescence is perhaps the most direct experunent in the ultrafast spectroscopist s palette. Because only one laser pulse interacts with the sample, the mediod is essentially free of the problems with field-matter time orderings that arise in all of the subsequently discussed multipulse methods. The signal... [Pg.1975]

The main cost of this enlianced time resolution compared to fluorescence upconversion, however, is the aforementioned problem of time ordering of the photons that arrive from the pump and probe pulses. Wlien the probe pulse either precedes or trails the arrival of the pump pulse by a time interval that is significantly longer than the pulse duration, the action of the probe and pump pulses on the populations resident in the various resonant states is nnambiguous. When the pump and probe pulses temporally overlap in tlie sample, however, all possible time orderings of field-molecule interactions contribute to the response and complicate the interpretation. Double-sided Feymuan diagrams, which provide a pictorial view of the density matrix s time evolution under the action of the laser pulses, can be used to detenuine the various contributions to the sample response [125]. [Pg.1980]

Katzenellenbogen N and Grischkowsky D 1991 Efficient generation of 380 fs pulses of THz radiation by ultrafast laser pulse excitation of a biased metal-semiconductor interface Appl. Phys. Lett. 58 222-4... [Pg.1991]

Shank C V 1988 Generation of ultrashort optical pulses Ultrashort Laser Pulses and Applications ed W Kaiser (Berlin Springer) pp 5-34... [Pg.1991]

Kane D J, Taylor A J, Trebino R and DeLong K W 1994 Single-shot measurement of the intensity and phase of a femtosecond UV laser pulse with frequency-resolved optical gating Opt. Lett. 19 1061-3... [Pg.1994]

Dugan M A, Tull J X and Warren W S 1997 High-resolution acousto-optic shaping of unamplified and amplified femtosecond laser pulses J. Opt. Soc. Am. B 14 2348-58... [Pg.2002]

Kaiser W (ed) 1988 Ultrashort Laser Pulses and Applications (Berlin Springer)... [Pg.2003]

Rulliere C (ed) 998 Femtosecond Laser Pulses (BerWn Springer)... [Pg.2003]

Figure B2.3.9. Schematic diagram of an apparatus for laser fluorescence detection of reaction products. The dye laser is syncln-onized to fire a short delay after the excimer laser pulse, which is used to generate one of the reagents photolytically. Figure B2.3.9. Schematic diagram of an apparatus for laser fluorescence detection of reaction products. The dye laser is syncln-onized to fire a short delay after the excimer laser pulse, which is used to generate one of the reagents photolytically.
The time resolution of these methods is detennined by the time it takes to mitiate the reaction, for example the mixing time in flow tubes or the laser pulse width in flash photolysis, and by the time resolution of the detection. Relatively... [Pg.2116]

The experiments were perfonued in a static reaction cell in a large excess of N2 (2-200 bar). An UV laser pulse (193 mu, 20 ns) started the reaction by the photodissociation of N2O to fonu O atoms in the presence of NO. The reaction was monitored via the NO2 absorption at 405 mu using a Hg-Xe high-pressure arc lamp, together with direct time-dependent detection. With a 20-200-fold excess of NO, the fonuation of NO2 followed a pseudo-first-order rate law ... [Pg.2126]


See other pages where Laser-pulse is mentioned: [Pg.695]    [Pg.54]    [Pg.77]    [Pg.80]    [Pg.268]    [Pg.275]    [Pg.887]    [Pg.1056]    [Pg.1072]    [Pg.1170]    [Pg.1297]    [Pg.1297]    [Pg.1566]    [Pg.1604]    [Pg.1607]    [Pg.1968]    [Pg.1969]    [Pg.1974]    [Pg.1980]    [Pg.1981]    [Pg.1985]    [Pg.1985]    [Pg.1986]    [Pg.1989]    [Pg.1989]    [Pg.1990]    [Pg.1990]    [Pg.1990]    [Pg.2078]    [Pg.2115]   
See also in sourсe #XX -- [ Pg.7 , Pg.8 ]

See also in sourсe #XX -- [ Pg.47 , Pg.49 , Pg.50 , Pg.57 , Pg.66 , Pg.85 ]

See also in sourсe #XX -- [ Pg.7 , Pg.8 ]

See also in sourсe #XX -- [ Pg.56 , Pg.66 , Pg.69 , Pg.101 , Pg.112 , Pg.129 , Pg.131 , Pg.135 , Pg.138 , Pg.196 , Pg.344 , Pg.345 , Pg.346 , Pg.350 , Pg.354 , Pg.382 , Pg.387 , Pg.389 , Pg.390 , Pg.480 ]

See also in sourсe #XX -- [ Pg.18 , Pg.19 ]




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Atoms radiative lifetimes, pulsed laser

Chirped laser pulses

Chirped laser pulses equation

Chirped laser pulses passage

Chirped-pulse amplification, femtosecond laser

Coherent control intense laser pulses

Coherent optimal control by tailored strong-field laser pulses

Colliding pulse mode-locked ring dye laser

Control process, laser pulses, research

Delayed extraction short-pulsed lasers

Diode lasers pulse shape

Dissociation laser-pulse molecular

Dye lasers pulsed

Effects due to laser pulse duration

Emission Spectra of Pulsed Chemical Lasers

Energy laser pulse

Energy resolution pulsed lasers

Experiments with Laser Pulse Manipulation

Femtosecond laser pulse spectroscopy

Femtosecond laser pulses

Femtosecond laser pulses broadband

Femtosecond laser pulses, molecular systems

Femtosecond laser pulses, phase-modulated

Femtosecond laser pulses, uncertainty principle

Femtosecond monitoring laser pulse

Femtosecond pulsed lasers

Few-cycle laser pulses

Fourier transform laser pulse measurement

Frequency Comb from Femtosecond Laser Pulses

Gain in continuous-wave and pulsed lasers

Generalization of the Floquet theory to treat dynamics in pulse lasers

Generation of Short Laser Pulses

Giant laser pulses

High-power pulsed laser

Holography pulsed laser

Irradiation laser pulse

Laser colliding-pulse

Laser induced pressure pulse method

Laser photolysis pulsed lasers

Laser pulse absorption

Laser pulse duration

Laser pulse duration effect

Laser pulse intensity versus duration

Laser pulse method, thermal measurement

Laser pulse propagation

Laser pulse shortest

Laser pulse techniques

Laser pulse ultrafast

Laser pulse width

Laser pulse-induced properties

Laser pulsed

Laser pulsed emissions

Laser pulsed operation

Laser pulsed radar

Laser pulses analytic design

Laser pulses field control

Laser pulses optimal control theory

Laser pulses restrictions

Laser pulses, coherence property

Laser pulses, coherence property measurements

Laser pulses, quantum dynamics

Laser pulses, quantum dynamics Hamiltonian-dynamical resonances

Laser pulses, quantum dynamics coherent states

Laser pulses, quantum dynamics states

Laser pulses, quantum dynamics techniques

Laser pulsing techniques

Laser pump-pulse irradiation

Laser sample pulsing

Laser short pulse

Laser spectroscopy short pulse generation

Laser synchronized subpicosecond pulse

Laser synchronized subpicosecond pulse radiolysis

Laser ultrashort pulses

Laser-Pulsed Measurements

Laser-induced pressure pulse

Laser-induced proton pulse

Laser-induced proton pulse reactions

Laser-pulse energy requirements

Laser-pulsed photolysis, transient absorption

Laser-pulsed photolysis, transient absorption profiles

Lasers three pulsed

Light sources pulsed lasers

Loading pulsed laser

MALDI laser pulse

MAPLE (matrix-assisted pulsed laser

Matrix-assisted laser desorption/ionization pulsed

Matrix-assisted pulsed laser deposition

Matrix-assisted pulsed laser deposition MAPLE)

Matrix-assisted pulsed laser evaporation

Matrix-assisted pulsed laser evaporation MAPLE)

Measuring laser power and pulse energy

Microstructuring using Short-Pulse Lasers

Mode-Locking and Ultrashort Laser Pulses

Multichannel advantage pulsed lasers

Nanosecond laser-pulse

Nanosecond laser-pulse experiment

Nitrogen lasers, pulsed

Normalized laser pulse, fluorescence

One-Photon Dissociation with Laser Pulses

Optical Ramsey Resonances Obtained Through an Equidistant Train of Laser Pulses

Optimal control theory laser pulse design

Organic pulse lasers

Parameters of Pulsed Chemical Lasers

Phase fluorometers using the harmonic content of a pulsed laser

Picosecond Pulsed Dye Lasers

Picosecond laser pulse

Picosecond laser pulse excitation

Picosecond laser pulses, and

Picosecond laser pulses, reliability

Picosecond-pulsed laser

Polarized laser pulses

Polymer films pulsed laser deposition

Polymerization laser pulses

Processing methods pulsed-laser deposition

Pulse Radiolysis and Laser Flash Photolysis

Pulse laser ablation

Pulse laser deposition

Pulse laser photolysis

Pulse laser polymerization method

Pulse radiolysis-laser flash photolysis

Pulsed Gas Lasers

Pulsed Laser Deposition (PLD)

Pulsed UV laser

Pulsed Versus CW Lasers for Photoionization

Pulsed diode lasers

Pulsed infrared lasers

Pulsed laser Raman technique

Pulsed laser ablation

Pulsed laser ablation deposition

Pulsed laser ablation deposition technique

Pulsed laser action

Pulsed laser atom probe

Pulsed laser deposition

Pulsed laser deposition , mesoporous

Pulsed laser deposition basics

Pulsed laser deposition demonstrator devices

Pulsed laser deposition fundamental processes

Pulsed laser deposition instrumentation

Pulsed laser deposition method

Pulsed laser deposition modelling

Pulsed laser deposition nanostructures

Pulsed laser deposition system

Pulsed laser deposition technique

Pulsed laser deposition technique fabricate thin films

Pulsed laser deposition, advantages

Pulsed laser desorption

Pulsed laser etching, thin films

Pulsed laser fields

Pulsed laser fields analog

Pulsed laser fields excitation

Pulsed laser fields pump photonics

Pulsed laser irradiation

Pulsed laser photolysis

Pulsed laser photolysis measurement

Pulsed laser photolysis synthesis

Pulsed laser polymerization

Pulsed laser spectrometers

Pulsed laser spectroscopy, interface between

Pulsed lasers CARS spectroscopy

Pulsed lasers examples

Pulsed lasers shielding

Pulsed lasers, femtosecond time scale

Pulsed photolysis/laser-induced

Pulsed photolysis/laser-induced fluorescence

Pulsed ruby laser

Pulsed vs CW Lasers for Photoionization

Pulsed-Laser Experiments

Pulsed-Laser-Pumped Dye Lasers

Pulsed-laser deposition of thin films

Pulsed-laser photolysis, apparatus

Pulsed-laser photolysis, nitrile ylides

Pulsed-laser polymerisation

Pulsed-laser time-of-flight atom-probe

Pulsed-laser vaporization method

Pulsed-laser-deposited film

Pulsed-laser-induced polymerization

Pulsed-laser-initiated polymerization

Q-switched pulsed lasers

Raman pulsed lasers

Relativistically intense laser pulse

Relaxation processes, picosecond laser pulse study

Sample laser pulse striking surface

Schematic Layout of a Pulsed Laser Deposition System

Single pulse pulsed laser polymerization

Structuring of Metal Surfaces by Ultra-Short Pulsed Laser Irradiation

Studies on Laser Pulse Propagation

Sub 10 fs Pulses with Chirped Laser Mirrors

Superposition states symmetric state, pulse laser

Symmetric states pulse laser preparation

The Colliding Pulse Mode-Locked Laser

The pulsed dye laser

Thin-film pulsed laser deposition

Time Profiles of Pulsed Lasers

Time-delayed, two-color pulse laser

Time-delayed, two-color pulse laser photolysis

Time-resolved resonance Raman spectroscopy pulsed lasers

Time-resolved spectroscopy with pulsed lasers

Two femtosecond laser pulses

Ultra-short pulse lasers

Ultra-short pulsed laser irradiation

Ultra-short pulsed laser irradiation structure

Ultrafast pulse-probe laser

Ultrafast pulse-probe laser spectroscopy

Ultrashort laser pulses, photoexcitation

Ultrashort pulsed laser

Ultraviolet laser pulse

Ultraviolet laser pulse spectroscopy

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