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Using analytic estimates, the relative merits of resonant photoexcitation pumping are compared with other excitation methods of X-ray lasers, specifically electron-collision and -recombination pumping. It is shown that the potential of line pumping to achieve high gain in the X-ray region is higher than that of the other methods using high-power lasers or Z-pinch plasmas as pump sources. In the second part of the paper, the conditions required to obtain an inversion if the pumping ion and the lasing ion are of the same kind are investigated. The analysis is performed for laser transitions of the type delta-n non-zero as well as for delta-n = 0.

Additional information

Authors: CHICHKOV B N, P.N. Lebedev Physical Institute, Moscow (SU);FILL E E, Max-Planck-Institut für Quantenoptik, Garching (DE)
Bibliographic Reference: Article: Physical Review A, Vol. 42 (1990) No. 1, pp. 599-610
Record Number: 199011448 / Last updated on: 1994-12-02
Original language: en
Available languages: en