Coherent light generators – Particular pumping means – Pumping with optical or radiant energy
Patent
1983-09-30
1986-05-27
Scott, Jr., Leon
Coherent light generators
Particular pumping means
Pumping with optical or radiant energy
372 76, 372 5, H01S 309
Patent
active
045920648
ABSTRACT:
Described is a high gain, soft X-ray pumped, inner-shell, photoionization amplifier/laser in Cd or Zn vapors. The soft X-ray photoionization, generated by a laser-produced plasma or other high intensity X-ray source, preferentially removes inner-shell d-electrons from neutral atoms leaving them ionized in a .sup.2 D state and producing a population inversion with respect to a lower lying .sup.2 p state. Also described are techniques for achieving inversions with respect to the ion ground state of Cd, Zn or Hg by optically pumping from the inner-shell ionized state to a higher energy level. Iso-electronic scaling of Cd, Zn and Hg suggests similar lasing phenomena exist, for example, in Ga, In and Tl ions, respectively, and also higher iso-electronic sequences.
REFERENCES:
patent: 3900803 (1975-08-01), Silfvast et al.
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Caro et al.; "Soft X-Ray Pumping of Metastable Levels of Li.sup.+ ", Applied Phys. Lett., vol. 42, No. 1, Jan. 1983.
Rozanov; "Feasibility of Producing an Inverted Medium by Photoionization of the Inner Electrons in Atoms"; JETP Lett., vol. 12, No. 10, pp. 340-342, Nov. 20, 1970.
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H. A. Hyman and S. A. Mani, "Effect of Autoionizing States on the Proposed Lithium Soft X-Ray Laser," Optics Communications, vol. 20, No. 2, Feb. 1977, pp. 209-213.
S. E. Harris, R. W. Falcone, M. Gross, R. Normandin, K. D. Pedrotti, J. E. Rothenberg, J. C. Wang, J. R. Willison, and J. F. Young, "Anti-Stokes Scattering as an XUV Radiation Source," Laser Spectroscopy V, Jun. 29-Jul. 3, 1981, pp. 437-445.
AT&T Bell Laboratories
Jr. Leon Scott
Urbano Michael J.
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