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Optics Letters

Optics Letters


  • Vol. 24, Iss. 2 — Jan. 15, 1999
  • pp: 101–103

Demonstration of transient gain x-ray lasers near 20nm for nickellike yttrium, zirconium, niobium, and molybdenum

James Dunn, Joseph Nilsen, Albert L. Osterheld, Yuelin Li, and Vyacheslav N. Shlyaptsev  »View Author Affiliations

Optics Letters, Vol. 24, Issue 2, pp. 101-103 (1999)

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We demonstrate strong lasing on the Ni-like 4d1S0→4p1P1 transition at 18.9, 20.3, 22.0, and 24.0 nm for Mo, Nb, Zr, and Y ions, respectively, using the transient collisional excitation scheme. Approximately 5 J of laser energy in a combination of a 600-ps pulse and a 1-ps pulse from the Compact Multipulse Terawatt (COMET) tabletop laser system is used to irradiate slab targets of these materials. Small-signal gains of 17–26cm -1 are determined on the 4d→4p transition, with overall gain–length products gL of 11–12. Lasing is observed and gain is measured on the 4f1P1→4d1P1 transition, which is pumped by collisional excitation combined with self-photopumping, for what is to our knowledge the first time.

© 1999 Optical Society of America

OCIS Codes
(140.7090) Lasers and laser optics : Ultrafast lasers
(140.7240) Lasers and laser optics : UV, EUV, and X-ray lasers
(320.5390) Ultrafast optics : Picosecond phenomena
(340.7480) X-ray optics : X-rays, soft x-rays, extreme ultraviolet (EUV)
(350.5400) Other areas of optics : Plasmas

James Dunn, Joseph Nilsen, Albert L. Osterheld, Yuelin Li, and Vyacheslav N. Shlyaptsev, "Demonstration of transient gain x-ray lasers near 20nm for nickellike yttrium, zirconium, niobium, and molybdenum," Opt. Lett. 24, 101-103 (1999)

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