Abstract
A simple model of dynamics of a collisional X-ray laser is given applying Maxwell-Bloch equations in a uniform approximation. The main considered parameters include polarization and coherence of the emitted radiation. Speckle pattern, typical for a radiation source of partial coherence, especially, if involving process of the amplified spontaneous emission (ASE), are used as an alternative source of information on the processes occurring in the active medium of an X-ray laser. A level of partial coherence is deduced by statistical analysis of the speckle pattern generated in the output beam of the laser. It is shown that plasma fluctuation and non-Gaussian character of the statistics are needed to reproduce the transverse coherence values reported in the experiment.
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References
Pert, G.J.: Output characteristics of amplified-spontaneous-emission lasers. J. Opt. Soc. Am. B 11, 1425 (1994)
Keenan, R., et al.: High-repetition-rate grazing-incidence pumped X-ray laser operating at 18.9 nm. Phys. Rev. Lett. 94, 103901 (2005)
Luther, B.M., et al.: Saturated high-repetition-rate 18.9-nm tabletop laser in nickellike molybdenum. Opt. Lett. 30, 165–167 (2005)
Kim, H.T., et al.: Characteristics of Ni-like silver X-ray laser pumped by single profiled laser pulse. J. Opt. Soc. Am. B 25, B76–B84 (2008)
Kravis, S.P., Allen, L.: Measurement of the statistics and spatial distribution of pulsed spontaneous emission. Opt. Commun. 23, 289 (1977)
Nishikino, M., et al.: Characterization of a high-brilliance soft x-ray laser at 13.9 nm by use of an oscillator-amplifier configuration. Appl. Opt. 47, 1129 (2008)
Lu, P., et al.: Spatial coherence of prepulse-induced neon-like x-ray lasers. Phys. Rev. A 58, 628 (1998)
Liu, Y., et al.: Spatial coherence measurements of a 13.2 nm transient nickel-like cadmium soft X-ray laser pumped at grazing incidence. Opt. Express 14, 12872–12879 (2006)
Gan, C.H., Gbur, G., Visser, T.D.: Surface plasmons modulate the spatial coherence of light in Young’s interference experiment. Phys. Rev. Lett. 98, 043908 (2007)
Kawachi, T., et al.: Observation of polarization of the soft X-ray laser line in neonlike germanium ions. Phys. Rev. Lett. 75, 3826 (1995)
Rus, B., et al.: Demonstration of amplification of a polarized soft-x-ray laser beam in a neonlike germanium plasma. Phys. Rev. A 51, 2316–2327 (1995)
Gilbaud, O., et al.: Origin of microstructures in picosecond X-ray laser beam. Europhys. Lett. 74, 823–829 (2006)
Goodman, J.W.: Statistical properties of laser speckle pattern. In: Dainty, J.C. (ed.) Laser Speckle and Related Phenomena, 2nd edn. Springer, Berlin (1984)
Goodman, J.W.: Speckle Phenomena in Optics: Theory and Applications. Roberts & Company, Englewood (2006)
Goodman, J.W.: Speckle with a finite number of steps. Appl. Opt. 47, A111 (2008)
Kawachi, T., et al.: Source development of novel coherent x-rays and their applications in JAEA. In: Sebban, S., et al. (eds.) X-Ray Lasers 2012. Springer Proceedings in Physics, vol. 147. Springer, Cham (2013). Chapter 23 in this book
Kim, C.M., Lee, J., Janulewicz, K.A.: Coherent amplification of an ultrashort pulse in a high- and swept-gain medium with level degeneracy. Phys. Rev. Lett. 104, 053901 (2010)
Koch, J.A., et al.: Experimental and theoretical investigation of neonlike selenium x-ray laser spectral linewidths and their variation with amplification. Phys. Rev. A 50, 1877 (1994)
Rocca, J.J., et al.: Saturated 13.2 nm high-repetition rate laser in nickel-like cadmium. Opt. Lett. 30, 2581–2583 (2005)
Goodman, J.W.: Statistical Optics, Chap. 9.1. A Wiley-Interscience Publication. Wiley, New York (1985)
London, R.A., Strauss, M., Rosen, M.D.: Modal analysis of X-ray laser coherence. Phys. Rev. Lett. 65, 563 (1990)
Feit, M.D., Fleck, J.A. Jr.: Spatial coherence of laboratory soft x-ray lasers. Opt. Lett. 16, 76 (1991)
Abernathy, D.L., et al.: Small-angle X-ray scattering using coherent undulator radiation at the ESRF. J. Synchrotron Radiat. 5, 37–47 (1998)
Tsui, O.K.C., Mochrie, S.G.J., Berman, L.E.: Statistical analysis of X-ray speckle at the NSLS. J. Synchrotron Radiat. 5, 30–36 (1998)
Pert, G.J.: Optimizing the performance of nickel-like collisionally pumped x-ray lasers. Phys. Rev. A 73, 033809 (2006)
Casperson, L., Yariv, A.: Pulse propagation in a high-gain medium. Phys. Rev. Lett. 26, 293 (1971)
Acknowledgements
We would like to pay credit to Dr. Hyung Taek Kim for his help in the experimental effort. The work was supported partially by TBP GIST, NCRC and DASAN.
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Janulewicz, K.A. et al. (2014). Speckle Statistics, Coherence and Polarization of a Collisional Soft X-Ray Laser. In: Sebban, S., Gautier, J., Ros, D., Zeitoun, P. (eds) X-Ray Lasers 2012. Springer Proceedings in Physics, vol 147. Springer, Cham. https://doi.org/10.1007/978-3-319-00696-3_21
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DOI: https://doi.org/10.1007/978-3-319-00696-3_21
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