Temporal Coherence and Spectral Linewidth of Neon-Like XUV Lasers Pumped in the Quasi-steady State Regime

We report recent experimental progress in the characterization of the temporal coherence and related spectral linewidth of plasma-based soft X-ray lasers (SXRL). New measurements were carried out with two types of SXRLs pumped in the quasi-steady state (QSS) regime, in a capillary-discharge plasma and in a laser-produced plasma. We describe the main results obtained from both experiments and compare them to dedicated numerical simulations. We discuss the results in the context of the possibility to achieve XUV lasers with pulse duration below 1 picosecond.

[1]  Jorge J. Rocca,et al.  Measurement of the spatial coherence buildup in a discharge pumped table-top soft x-ray laser , 1997 .

[2]  T. Mocek,et al.  A high-intensity highly coherent soft X-ray femtosecond laser seeded by a high harmonic beam , 2004, Nature.

[3]  Philippe Zeitoun,et al.  X-Ray Lasers 2012 , 2014 .

[4]  Jorge J. Rocca,et al.  Spectral linewidth of a Ne-like Ar capillary discharge soft-x-ray laser and its dependence on amplification beyond gain saturation , 2012 .

[5]  Geoffrey J. Pert,et al.  Output characteristics of amplified-stimulated-emission lasers , 1994 .

[6]  Przemyslaw Wachulak,et al.  Single-shot extreme ultraviolet laser imaging of nanostructures with wavelength resolution. , 2008, Optics letters.

[7]  J Gautier,et al.  Fourier-limited seeded soft x-ray laser pulse. , 2010, Optics letters.

[8]  Jorge J. Rocca,et al.  Achievement of essentially full spatial coherence in a high-average-power soft-x-ray laser , 2001 .

[9]  A. Klisnick,et al.  Spectral Linewidth Measurement of a Ne-Like Ar Capillary Discharge Soft X-Ray Laser , 2014 .

[10]  M. G. Capeluto,et al.  Patterning of nano-scale arrays by table-top extreme ultraviolet laser interferometric lithography. , 2007, Optics express.

[11]  C. Menoni,et al.  High-brightness injection-seeded soft-x-ray-laser amplifier using a solid target. , 2006, Physical review letters.

[12]  Tomas Mocek,et al.  Observation of spectral gain narrowing in a high-order harmonic seeded soft-x-ray amplifier , 2010 .

[13]  Francesco Flora,et al.  Toward a full optimization of a highly saturated soft-X-ray laser beam produced in extremely long capillary discharge amplifiers , 2004 .

[14]  Osvaldo Daniel Cortázar,et al.  Demonstration of a Discharge Pumped Table-Top Soft-X-Ray Laser [Phys. Rev. Lett. 73, 2192 (1994)] , 1994 .

[15]  Talin,et al.  Model for the line shapes of complex ions in hot and dense plasmas. , 1990, Physical review. A, Atomic, molecular, and optical physics.

[16]  Underwood,et al.  Experimental and theoretical investigation of neonlike selenium x-ray laser spectral linewidths and their variation with amplification. , 1994, Physical review. A, Atomic, molecular, and optical physics.

[17]  Dennis L. Matthews,et al.  Collisional redistribution effects on x‐ray laser saturation behavior , 2008 .

[18]  Benjamin Koch,et al.  Black Holes and Running Couplings: A Comparison of Two Complementary Approaches , 2013, 1311.1121.

[19]  B. Rus,et al.  Plasma-based X-ray laser at 21 nm for multidisciplinary applications , 2009 .

[20]  K. Cassou,et al.  Longitudinal coherence and spectral profile of a nickel-like silver transient soft X-ray laser , 2006 .

[21]  A. Klisnick,et al.  Temporal coherence and spectral linewidth of an injection-seeded transient collisional soft x-ray laser. , 2011, Optics express.

[22]  J. Rocca,et al.  Demonstration of a desk-top size high repetition rate soft x-ray laser. , 2005, Optics express.

[23]  Jorge J. Rocca,et al.  Demonstration of a High Average Power Tabletop Soft X-Ray Laser , 1998 .

[24]  Tomas Mocek,et al.  Multimillijoule, highly coherent x-ray laser at 21 nm operating in deep saturation through double-pass amplification , 2002 .

[25]  Jorge J. Rocca,et al.  Generation of millijoule-level soft-x-ray laser pulses at a 4-Hz repetition rate in a highly saturated tabletop capillary discharge amplifier. , 1999 .

[26]  P. Zeitoun,et al.  Electromagnetic-field distribution measurements in the soft x-ray range: full characterization of a soft x-ray laser beam. , 2002, Physical review letters.