[1] Zhang J,Warwick P J,Wolfrum E,et al.Saturated output of a Ge XIII x-ray laser at 19.6 nm[J].Physical Review A,1996,54:R4653-R4656.

[2] Koch J A,MacGowan B J,DaSilva L B,et al.Observation of gain-narrowing and saturation behavior in Se x-ray laser line profiles[J].Physical Review Letter,1992,68:3291-3294.

[3] DaSilva L B,MacGowan B J,Mrowka S,et al.Power measurements of a saturated yttrium x-ray laser[J].Optics Letter,1993,18:1174-1177.

[4] Zhang J,MacPhee A G,Nilsen J,et al.Demonstration of saturation in a Ni-like Ag X-ray laser at 14 nm[J].Physical Review Letter,1997,78:3856-3859.

[5] Zhang J,MacPhee A G,Lin J,et al.A saturated X-ray laser beam at 7 nanometers[J].Science,1997,276:1097-1100.

[6] Nickles P V,Shlyaptsev V N,Kalachnikow M,et al.Short pulse X-ray laser at 32.6 nm based on transient gain in Ne-like Titanium[J].Physical Review Letter,1997,78:2748-2751.

[7] Li R X,Ozaki T,Kanai T,et al.Proposal of a longitudinally pumped saturated Ni-like Mo ion X-ray laser at 18.9 nm[J].Physical Review E,1998,57:7093-7102.

[8] Ozaki T,Ganeev R A,Ishizawa A,et al.Highly directive 18.9 nm Ni-like Mo X-ray laser operating at 150mJ pump energy[J].Physical Review Letter,2002,89:253902.

[9] Keenan R,Dunn J,Patel P K,et al.High repetition-rate grazing-incidence pumped X-ray laser operating at 18.9 nm[J].Physical Review Letter,2005,94:103901.

[10] Stevenson R M,Norman M J,Bett T H,et al.Binary-phase zone plate arrays for the generation of uniform focal profiles[J].Optics Letters,1994,19:363-366.

[11] Bett T H,Danson C N,Jinks P,et al.Binary-phase zone-plate arrays for laser-beam spatial-intensity distribution conversion[J].Applied Optics,1995,34:4025-4037.

[12] Li H M,Li Y J,Zhang J.The role of compound lens in optimizing the irradiation uniformity in longitudinal pumping laser[J].Chin Phys,2004,22:603.