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Phase control and measurement of ultrashort optical pulses

Description: We have used the Direct Optical Spectral Phase Measurement (DOSPM) technique to characterize the cubic phase tuning ability of our pulse stretcher. We have compared the measured phase to the phase determined from cross-correlation measurements.
Date: February 10, 1995
Creator: Sullivan, A.; White, W.E.; Chu, K.C. & Heritage, J.P.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chirped-Pulse Amplification with flashlamp-pumped Ti:Sapphire amplifiers. Revision 1

Description: Ti:Sapphire (Ti:Al{sub 2}O{sub 3}) amplifier stages are typically pumped with Q-switched Nd:YAG lasers doubled to 532 nm because of good spectral overlap, short temporal width, high repetition rate (i.e., 10 Hz to > 5 kHz) and the problems associated with flashlamp pumping a material with a relatively short upper state lifetime. Limitations to this pumping method arise due to the 1 to 1.5 joule/pulse ceiling found in most commercial high rep rate Nd:YAG lasers. The availability of high quality,… more
Date: January 1, 1994
Creator: Bonlie, J. D.; White, W. E.; Price, D. F. & Reitze, D. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Chirped-Pulse Amplification with flashlamp-pumped Ti:Sapphire amplifiers

Description: Ti:Sapphire (Ti:Al{sub 2}O{sub 3}) amplifier stages are typically pumped with Q-switched Nd:YAG lasers doubled to 532 nm because of good spectral overlap, short temporal width, high repetition rate (i.e., 10 Hz to > 5 kHz) and the problems associated with flashlamp pumping a material with a relatively short upper state lifetime. Limitations to this pumping method arise due to the 1 to 1.5 joule/pulse ceiling found in most commercial high rep rate Nd:YAG lasers. The availability of high quality,… more
Date: January 1, 1994
Creator: Bonlie, J. D.; White, W. E.; Price, D. F. & Reitze, D. H.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Study of supra-thermal electrons and K-{alpha} x-rays from high intensity 500 fs laser-produced plasmas

Description: We describe recent laser-solid interaction experiments using the 500 fs Janus Nd:glass (1053 nm) laser presently at 1.5 TW power level. The laser beam path is enclosed in vacuum from the compressor to the target and is focused using an off-axis paraboloid. Optical diagnostics monitor the near field pattern, focal spot, spectrum, temporal shape and pre-pulse level. A 12 {mu}m diameter (FWHM) focal spot is achieved (2.5 {times} diffraction limit) corresponding to a peak irradiance of 8 {times} 10… more
Date: July 1, 1995
Creator: Dunn, J.; Young, B. K. F.; Hankla, A. K.; Conder, A. D.; White, W. E. & Stewart, R. E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Independent adjustment of the higher order frequency dependent phase in Chirped Pulse Amplification systems

Description: We have developed a system that allows compensation of higher order phase terms that limit chirped pulse amplification systems. Results indicate phase can be compensated by a properly adjusted air-spaced doublet within the stretcher.
Date: April 14, 1993
Creator: White, W. E.; Patterson, F. G.; Combs, R.; Seppala, L.; Price, D. F.; Shepherd, R. L. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Table-top transient collisional excitation x-ray laser research at LLNL

Description: We describe recent experiments at the Lawrence Livermore National Laboratory (LLNL) to produce a table-top x-ray laser. Using a combination of long 800 ps and short {approximately}1 ps high power laser pulses with {approximately} 6 J in each beam, a transient collisionally excited Ne-like ion x-ray laser scheme has been investigated. We present results of high x-ray laser gain for the Ne- like Ti 3p-3s J=O-l transition at 326 {Angstrom} and have achieved gL product of 15 for target lengths up t… more
Date: October 6, 1997
Creator: Dunn, J.; Osterheld, A. L.; Shepherd, R.; White, W. E.; Shlyaptsev, V. N.; Bullock, A. B. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Multi-terrawatt, 100 fsec laser system using flashlamp-pumped, dye- converted Ti:Sapphire as an amplifier

Description: We report on amplification of 100 fsec laser pulses to 250 mJ using flashlamp-pumped, dye converted Ti:Sapphire. The resulting 5 Hz beam is focused to irradiances in excess of 5 {times} 10{sup 18} W/cm{sup 2}.
Date: April 14, 1993
Creator: White, W. E.; Reitize, D. H.; Price, D. F.; Shepherd, R. L.; Bonlie, J. D.; Hunter, J. R. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

In-Situ Cleaning of Metal Photo-Cathodes in rf Guns

Description: Metal cathodes installed in rf guns typically exhibit much lower quantum efficiency than the theoretical limit. Experimenters often use some sort of in situ technique to ''clean'' the cathode to improve the QE. The most common technique is laser cleaning where the laser is focused to a small spot and scanned across the cathode surface. However, since the laser is operated near the damage threshold, it can also damage the cathode and increase the dark current. The QE also degrades over days and … more
Date: January 3, 2007
Creator: Schmerge, J. F.; Castro, J. M.; Clendenin, J. E.; Colby, E. R.; Dowel, D. H.; Gierman, S. M. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Matter in Extreme Conditions Instrument - Conceptual Design Report

Description: The SLAC National Accelerator Laboratory (SLAC), in collaboration with Argonne National Laboratory (ANL), Lawrence Livermore National Laboratory (LLNL), and the University of California at Los Angeles (UCLA), is constructing a Free-Electron Laser (FEL) research facility. The FEL has already met its performance goals in the wavelength range 1.5 nm - 0.15 nm. This facility, the Linac Coherent Light Source (LCLS), utilizes the SLAC 2-Mile Linear Accelerator (linac) and will produce sub-picosecond … more
Date: December 9, 2009
Creator: Boyce, R. F.; Boyce, R. M.; Haller, G.; Hastings, J. B.; Hays, G.; Lee, H. J. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

X-band photoinjector for a chirped-pulse FEL

Description: The phase noise and jitter characteristics of the laser and rf systems of a high gradient X-band photoinjector have been measured experimentally. When > 100 coherently phased 5 MeV electron bunches are produced in bursts, the photoinjector should be an ideal electron source for a pulsed, pre-bunched free-electron laser (FEL) operating at 100 GHz. The laser oscillator is a self-modelocked Titanium:Sapphire system operating at the 108th subharmonic of the rf gun. The X-band signal is produced fro… more
Date: December 15, 1998
Creator: Luhmann, Jr. N. C.; Alvis, R. M.; Baldis, H. A.; Hartemann, F. V; Heritage, J. P.; Ho, C. H. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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