Low-phonon-frequency chalcogenide crystalline hosts for rare ear

Details Low-phonon-frequency chalcogenide crystalline hosts for rare ear Low-phonon-frequency chalcogenide crystalline hosts for rare ear

1999-01-22

2000-04-04

Scott, Jr., Leon

Coherent light generators

Particular active media

Insulating crystal

372 39, 372 68, H01S 316

Patent

active

060470135

ABSTRACT:
The invention comprises a RE-doped MA.sub.2 X.sub.4 crystalline gain medium, where M includes a divalent ion such as Mg, Ca, Sr, Ba, Pb, Eu, or Yb; A is selected from trivalent ions including Al, Ga, and In; X is one of the chalcogenide ions S, Se, and Te; and RE represents the trivalent rare earth ions. The MA.sub.2 X.sub.4 gain medium can be employed in a laser oscillator or a laser amplifier. Possible pump sources include diode lasers, as well as other laser pump sources. The laser wavelengths generated are greater than 3 microns, as becomes possible because of the low phonon frequency of this host medium. The invention may be used to seed optical devices such as optical parametric oscillators and other lasers.

REFERENCES:
patent: 3833862 (1974-09-01), Wickersheim et al.
patent: 5166948 (1992-11-01), Gavrilovic et al.

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