Abstract

We report average powers exceeding 1 microwatt in laser transitions of Ne-like ions at wavelengths near 30 nm. Gain-saturated operation was obtained at a repetition rate of 5 Hz exciting solid targets with pump pulses of ~1 J energy and 8 ps duration impinging at grazing incidence of 20 degrees. Gain-length products of about 20 were obtained in the 30.4 nm and 32.6 nm transitions of Ne-like V and Ne-like Ti respectively. Strong lasing was also observed in Ne-like Cr at 28.6 nm and in the 30.1 nm line of Ne-like Ti.

© 2005 Optical Society of America

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AIP Conf. Proc. (1)

G. J. Tallents, Y. Abou-Ali, M. Edwards, R. E. King , G. J. Pert, S. J. Pestehe, F. Strati, R. Keenan, C. L. S. Lewis, S. Topping, O. Guilbaud, A. Klisnick, D. Ros, R. Clarke, D. Neely, and M. Notley, �??Saturated and Short Pulse Duration X-Ray Lasers,�?? in X-Ray Lasers:2002, J. J. Rocca, J. Dunn, and S. Suckewer, eds., AIP Conf. Proc. 641, 291-297 (2002).
[CrossRef]

IEEE J. Select. Topics Quantum Electron. (1)

M. A. Larotonda, B. M. Luther, Y. Wang, Y, Liu, D. Alessi, M. Berrill, A. Dummer, F. Brizuela, C. S. Menoni, M. C. Marconi, V. N. Shlyaptsev, J. Dunn, and J. J. Rocca, �??Characteristics of a Saturated 18.9-nm Tabletop Laser Operating at 5-Hz Repetition Rate,�?? IEEE J. Select. Topics Quantum Electron. 10, 1363-1367 (2004).
[CrossRef]

Opt. Lett. (2)

Phys. Rev. A (1)

K. A. Janulewicz, A. Lucianetti, G. Priebe, W. Sandner, P. V. Nickles, �??Saturated Ni-like Ag x-ray laser at 13.9 nm pumped by a single picosecond laser pulse,�?? Phys. Rev. A 68, Art. 051802 (2003).
[CrossRef]

Phys. Rev. Lett. (7)

Y. Wang, M. A. Larotonda, B. M. Luther, D. Alessi, M. Berrill, V. N. Shlyaptsev, and J. J. Rocca, �??Demonstration of saturated high repetition rate tabletop soft x-ray lasers at wavelengths down to 13.9 nm,�?? Phys. Rev. Lett. (submitted).
[PubMed]

S. Sebban, R. Haroutunian, P. Balcou, G. Grillon, A. Rousse, S. Kazamias, T. Marin, J. P. Rousseau, L. Notebaert, M. Pittman, J. P. Chambaret, A. Antonetti, D. Hulin, D. Ros, A. Klisnick, A. Carillon, P. Jaegle, G. Jamelot, J. F. Wyart, �??Saturated Amplification of a Collisionally Pumped Optical-Field-Ionization Soft X-Ray Laser at 41.8 nm,�?? Phys. Rev. Lett. 86, 3004-3007 (2001).
[CrossRef] [PubMed]

A. Butler, A. J. Gonsalves, C.M. McKenna, D. J. Spence, S. M. Hooker, S. Sebban, T. Mocek, and I. Bettaibi, and B. Cros, �??Demonstration of a Collisionally Excited Optical-Field-Ionization XUV Laser Driven in a Plasma Waveguide,�?? Phys. Rev. Lett. 91, Art. 205001 (2003).
[CrossRef] [PubMed]

S. Sebban, T. Mocek, D. Ros, L. Upcraft, P. Balcou, R. Haroutunian, G. Grillon, B. Rus, A. Klisnick, A. Carillon, G. Jamelot, C. Valentin, A. Rousse, J. P. Rousseau, L. Notebaert, M. Pittman, D. Hulin, �??Demonstration of a Ni-Like Kr Optical-Field-Ionization Collisional Soft X-Ray Laser at 32.8 nm,�?? Phys. Rev. Lett. 89, Art. 253901 (2002).
[CrossRef] [PubMed]

P. V. Nickles, V. N. Shlyaptsev, M. Kalachnikov, M. Schnürer, �??Short Pulse X-Ray Laser at 32.6 nm Based on Transient Gain in Ne-like Titanium,�?? Phys. Rev. Lett. 78, 2748-2751 (1997).
[CrossRef]

J. Dunn, Y. Li, A. L. Osterheld, J. Nilsen, J. R. Hunter, V. N. Shlyaptsev, �??Gain Saturation Regime for Laser-Driven Tabletop, Transient Ni-Like Ion X-Ray Lasers,�?? Phys. Rev. Lett. 84, 4834-4837 (2000).
[CrossRef] [PubMed]

B. R. Benware, C. D. Macchietto, C. H. Moreno, and J. J. Rocca, �??Demonstration of a High Average Power Tabletop Soft X-Ray Laser,�?? Phys. Rev. Lett. 81, 5804-5807 (1998).
[CrossRef]

Physical Review A (1)

J. Nilsen, �??Analysis of a picosecond-laser-driven Ne-like Ti x-ray laser,�?? Physical Review A 55, 3271-3274 (1997).
[CrossRef]

Proc. SPIE (2)

R. J. Thomas and J. M. Davila. �??EUNIS: a solar EUV normal incidence spectrometer,�?? in UV/EUV and Visible Space Instrumentation for Astronomy and Solar Physics, O. H. W. Siegmund, S. Fineschi, M. A. Gummin, eds., Proc. SPIE 4498, 161-172 (2001).
[CrossRef]

R. Keenan, J. Dunn, V. N. Shlyaptsev, R. Smith, P. K. Patel, D. F. Price, �??Efficient pumping schemes for high average brightness collisional x-ray lasers,�?? in Soft X-Ray Lasers and Applications V, E. E. Fill, S. Suckewer, eds., Proc. SPIE 5197, 213-220 (2003), and R. Keenan, J. Dunn, P. K. Patel, D. F. Price, R. F. Smith, V. N. Shlyaptsev, �??High repetition rate grazing incidence pumped X-ray laser operating at 18.9 nm,�?? Phys. Rev. Lett. (to be published).
[CrossRef]

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Figures (5)

Fig. 1.
Fig. 1.

Single shot on-axis spectra of 4 mm long line focus plasmas showing lasing in the 2p 53p 1 S0 -2p 53s 1 P 1 transition of Ne-like Ti, V and Cr ions. In all three cases, this laser-line dominates the spectrum.

Fig. 2.
Fig. 2.

Variation of output laser intensity as a function of grazing incidence angle for Ne-like Ti, V and Cr. Each point represents the mean of 15 or more consecutive laser shots. In all three cases the laser operates best at 20 degrees. At this angle the standard deviation of each data set ranges from 14% to 38% of the mean.

Fig. 3.
Fig. 3.

Laser output intensity of the 30.4 nm line of Ne-like V as a function of time delay between the main pre-pulse and the short pulse. Lasing is strong for delays ranging from 400 ps to 600 ps. Each point is the average of 10 or more laser shots; the error bars correspond to ± the standard deviation of the set.

Fig. 4.
Fig. 4.

Intensity of the 30.4 nm line of Ne-like V as a function of plasma length. Each point is the average of 10 or more shots. A fit of the data results in a gain coefficient of 72 cm-1 and a gain-length product of 21.7. Each point is the average of 10 or more laser shots; the error bars correspond to ± the standard deviation of the set.

Fig. 5.
Fig. 5.

Shot-to-shot variation of the intensity of the 30.4 nm Ne-like V laser line at 5 Hz repetition rate. The 250 consecutive shots have a distribution characterized by a standard deviation which is 35% of the mean.

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