Measurement of femtosecond ionization dynamics of atmospheric density gases by spectral blueshifting

Wood, W. M.; Siders, C. W.; Downer, Michael

doi:10.1103/physrevlett.67.3523

Cited by 228 publications

(88 citation statements)

References 17 publications

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“…3(b)). It should be noted that, at higher pressures, more complicated changes are found in the transmitted IR spectrum [28]. As was described before, if the wavelength shift of the high harmonics were just caused by conversion of the frequency-shifted drive laser, then the relative wavelength shift, δλ q /λ q , would be the same for all orders.…”

Section: Resultsmentioning

confidence: 82%

Spectral control of high-harmonic generation via drive laser pulse shaping in a wide-diameter capillary

et al. 2016

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Abstract:We experimentally investigate spectral control of high-harmonic generation in a wide-diameter (508 μm) capillary that allows using significantly lower gas pressures coupled with elevated drive laser energies to achieve higher harmonic energies. Using phase shaping to change the linear chirp of the drive laser pulses, we observe wavelength tuning of the high-harmonic output to both larger and smaller values. Comparing tuning via the gas pressure with the amount of blue shift in the transmitted drive laser spectrum, we conclude that both adiabatic and non-adiabatic effects cause pulse-shaping induced tuning of high harmonics. We obtain a fractional wavelength tuning, Δλ/λ, in the range from −0.007 to + 0.01, which is comparable to what is achieved with standard capillaries of smaller diameter and higher pressures. 752-755 (1996). 32. G. Tempea and T. Brabec, "Nonlinear source for the generation of high-energy few-cycle optical pulses," Opt.Lett. 23(16), 1286-1288 (1998).

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Section: Resultsmentioning

confidence: 82%

Spectral control of high-harmonic generation via drive laser pulse shaping in a wide-diameter capillary

et al. 2016

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“…Analysis of the spectrum of the specular backscattered laser have been used to monitor the critical surface expansion [39][40][41]. Similar experiments have been performed in gases [42][43][44] and clusters [45]. A more efficient method to probe the plasma expansion relies on the spectral analysis of a reflected auxiliary beam at different delays.…”

Section: Optical Characterization and Pump-probe Techniquesmentioning

confidence: 99%

Short-Pulse Laser-Produced Plasmas

Gauthier

2006

Springer Series in Chemical Physics

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“…In this case the blue shift for the main reflectance peak is relatively small (see Figure 39). The blue shifts have been observed in ultra-short laser/target interactions with gas targets [Freeman et al, 1987;Wood et al, 1991;Singhal et al, 2005]. Model studies show that the blue shift is the result of laser ionization of the gas target [Yablonovitch, 1988;Penetrante et al, 1992].…”

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confidence: 96%

Application of Advanced Laser Diagnostics to High-Impact Technologies: Science and Applications of Ultrafast, Ultraintense Lasers

Goss¹

2013

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The public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, to Department of Defense, Washington Headquarters Services, Directorate for Information , 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302. Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. REPORT DATE (DD-MM-YY)2. REPORT TYPE 3. DATES COVERED (From -To) AFRL/RQTC SPONSORING/MONITORING AGENCY REPORT NUMBER(S) AFRL-RQ-WP-TR-2013-0189 DISTRIBUTION/AVAILABILITY STATEMENTApproved for public release; distribution unlimited. SUPPLEMENTARY NOTESReport contains color. PA Case Number: 88ABW-2013-5333; Clearance Date: 17 Dec 2013. On many of the papers, the U.S. Government is joint author and has the right to use, modify, reproduce, release, perform, display, or disclose the work. ABSTRACTThis report describes the results of experimental and numerical investigations on the development of extreme-light diagnostics. The purpose of this program was to develop extreme-light diagnostic tools that could be utilized in the future for exploring new frontiers of aerospace science and performing in-place nondestructive evaluation and inspections of newly manufactured and fielded weaponssystems components. The objectives of this research program were realized through an extensive experimental campaign that utilized ultrafast and ultraintense laser systems for the development of advanced sources of secondary emission for nondestructive evaluation. The secondary sources were to include X-rays, energetic electrons, neutrons, and protons. At the crux of the work was the fundamental interaction between an incident, ultrafast, ultraintense laser pulse and a material target. A variety of target materials was explored in this work, and much of the effort was spent on fundamental studies. The results of these studies will serve to guide engineering efforts in establishing these sources for future Air Force applications. Most of the effort was directed toward the development of hard X-ray sources using both metal and liquid targets.The following titles, which have been published in professional journals and conference proceedings or are unpublished reports/presentations, are provided in this report:  "Efficiency and scaling of an ultrashort-pulse high-repetition-rate laser-driven X-ray source"  "An Evaluation of fs/ns-LIBS for Measuring Total Particulate Emissions"  "Picosecond Laser Machining of Shaped Holes In Thermal Barrier Coated Turbine Blades"  "Doub...

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Measurement of femtosecond ionization dynamics of atmospheric density gases by spectral blueshifting

Cited by 228 publications

References 17 publications

Spectral control of high-harmonic generation via drive laser pulse shaping in a wide-diameter capillary

Spectral control of high-harmonic generation via drive laser pulse shaping in a wide-diameter capillary

Short-Pulse Laser-Produced Plasmas

Application of Advanced Laser Diagnostics to High-Impact Technologies: Science and Applications of Ultrafast, Ultraintense Lasers

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