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8 July 1993 Chirped-pulse amplification experiments on the VULCAN Nd:glass laser facility
Colin N. Danson, L. J. Barzanti, Chungu Zenghu, A. R. Damerell, Mike D. Dooley, Christopher B. Edwards, S. Hancock, Michael H. Key, R. Mahadeo, M. R. G. Miller, Peter A. Norreys, C. E. Ollman, David A. Pepler, D. A. Rodkiss, Ian N. Ross, M. A. Smith, P. F. Taday, W. T. Toner, K. Wigmore, T. B. Winstone, R. W. W. Wyatt, Shen Luan, F. N. Beg, Angus S. Bell, A. E. Dangor, Marcus Henry R. Hutchinson, P. Lee, Ian P. Mercer, Roland A. Smith, F. Zhou, A. P. Fews
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Proceedings Volume 1860, Short-Pulse High-Intensity Lasers and Applications II; (1993) https://doi.org/10.1117/12.147582
Event: OE/LASE'93: Optics, Electro-Optics, and Laser Applications in Scienceand Engineering, 1993, Los Angeles, CA, United States
Abstract
A Chirped Pulse Amplification (CPA) mode of operation is being developed on the VULCAN high power Nd:glass laser system, at the Rutherford Appleton Laboratory (RAL). Experiments have been carried out using an interim configuration yielding pulses of up to 30 J on target of 2.4 picoseconds length at focused intensities up to 4 X 1017 W cm-2, with contrast ratio of 106. In the CPA technique the amplification of a stretched pulse to high energy followed by recompression provides a means of delivering a higher peak power to target than can be propagated through the laser system due to non-linear effects and component damage thresholds. In the system described here a grating pair is used to stretch a transform limited pulse of 2 ps, to 80 ps prior to amplification to high energy (80 J). The linear stretch produced by the gratings enables the pulse to be recompressed without pedestal. Recompression to the 10 TW level by a second grating pair is carried out in a vacuum propagation and reflective focusing system to avoid non-linear effects in air, windows and lenses.
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Colin N. Danson, L. J. Barzanti, Chungu Zenghu, A. R. Damerell, Mike D. Dooley, Christopher B. Edwards, S. Hancock, Michael H. Key, R. Mahadeo, M. R. G. Miller, Peter A. Norreys, C. E. Ollman, David A. Pepler, D. A. Rodkiss, Ian N. Ross, M. A. Smith, P. F. Taday, W. T. Toner, K. Wigmore, T. B. Winstone, R. W. W. Wyatt, Shen Luan, F. N. Beg, Angus S. Bell, A. E. Dangor, Marcus Henry R. Hutchinson, P. Lee, Ian P. Mercer, Roland A. Smith, F. Zhou, and A. P. Fews "Chirped-pulse amplification experiments on the VULCAN Nd:glass laser facility", Proc. SPIE 1860, Short-Pulse High-Intensity Lasers and Applications II, (8 July 1993); https://doi.org/10.1117/12.147582
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KEYWORDS
Picosecond phenomena
Oscillators
Pulsed laser operation
Diffraction gratings
Mirrors
Plasma
Neodymium glass lasers
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