Saturated high-repetition-rate 18.9-nm tabletop laser in nickellike molybdenum.

We report saturated operation of an 18.9-nm laser at 5-Hz repetition rate. An amplification with a gain-length product GL of 15.5 is obtained in the 4d 1S0-4p 1P1 laser line of Ni-like Mo in plasmas heated at grazing incidence with approximately 1-J pulses of 8.1-ps duration from a tabletop laser system. Lasing is obtained over a broad range of time delays and pumping conditions. We also measure a GL of 13.5 in the 22.6-nm transition of the same ion. The results are of interest for numerous applications requiring high-repetition-rate lasers at wavelengths below 20 nm.

[1]  Nilsen,et al.  Gain saturation regime for laser-driven tabletop, transient Ni-like ion X-Ray lasers , 2000, Physical review letters.

[2]  Troy W. Barbee,et al.  Saturated tabletop x-ray laser system at 19 nm , 2000 .

[3]  B. Carré,et al.  Phase diagram of γ-butyrolactone-dimethyl-carbonate mixtures , 2001 .

[4]  J. Reader,et al.  Spectrum and energy levels of thirteen-times ionized molybdenum (Mo XIV) , 1979 .

[5]  A Carillon,et al.  Demonstration of a Ni-like Kr optical-field-ionization collisional soft x-ray laser at 32.8 nm. , 2002, Physical review letters.

[6]  Joseph Nilsen,et al.  Investigations on 10-Hz sub-Joule fs-laser pumped neon- and nickel-like x-ray lasers , 2001, SPIE Optics + Photonics.

[7]  Jorge J. Rocca,et al.  Numerical studies of transient and capillary x-ray lasers and their applications , 2003, SPIE Optics + Photonics.

[8]  Vyacheslav N. Shlyaptsev,et al.  Efficient pumping schemes for high average brightness collisional x-ray lasers , 2003, SPIE Optics + Photonics.

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

[10]  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 .

[11]  Vyacheslav N. Shlyaptsev,et al.  Short Pulse X-Ray Laser at 32.6 nm Based on Transient Gain in Ne-like Titanium , 1997 .

[12]  R Keenan,et al.  High-repetition-rate grazing-incidence pumped x-ray laser operating at 18.9 nm. , 2005, Physical review letters.

[13]  T Ozaki,et al.  Highly directive 18.9 nm nickel-like molybdenum x-ray laser operating at 150 mJ pump energy. , 2002, Physical review letters.

[14]  A Carillon,et al.  Saturated amplification of a collisionally pumped optical-field-ionization soft X-ray laser at 41.8 nm. , 2001, Physical review letters.