Room-temperature, flashpumped, 2.09 micron solid state laser

Coherent light generators – Particular active media – Plural active media or active media having plural dopants

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372 39, 372 41, 372 32, 372 70, 372 69, H01S 314, H01S 313

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active

050881035

ABSTRACT:
A room temperature solid state laser for producing a laser emission at a wavelength of substantially 2.09 microns is disclosed. In a preferred embodiment, the laser includes: a laser cavity defined by first and second reflective elements opposing each other on a common axis to form a path therebetween; a laser crystal disposed in the laser cavity, the laser crystal having a host material capable of accepting Cr.sup.3+ sensitizer ions, Tm.sup.3+ sensitizer ions and Ho.sup.3+ activator ions; an amount of Cr.sup.3+ sensitizer ions between about 0.3% and about 2% dispersed within the host material; an amount of Tm.sup.3+ sensitzer ions between about 3% and about 12% dispersed within the host material; and an amount of Ho.sup.3+ activator ions between about 0.1% and about 0.7% dispersed within the host material; and flashlamp and means for exciting the laser crystal to produce a laser emission at substantially 2.09 microns with a slope efficiency of at least 4%, and preferably of at least 5%.

REFERENCES:
patent: 4701928 (1987-10-01), Fan et al.
"A New Spectroscopic Scheme of an Active Medium for the . . . ", Antipenko t al., Opt. Spectrosc. (USSR), 60(1), Jan. 1986, pp. 95-97.
"Active Medium of Lasers Operating in the 2.mu. Spectra Range . . . ", Antipenko et al., Sov. J. Quantum Electron., 16(7) Jul. 1986, pp. 955-957.
"Lasing of Holmium Ions as a Result of the 5/7.fwdarw.5/8 Transition . . . ", Allet'ev et al., Sov. J. Quantum Electron., 16(7), Oct. 1986, pp. 1404-1405.
"High-Efficiency 2.09 .mu.m Flashlamp-Pumped Laser", Quarles et al., Appl. Phys. Lett., 55(11) Sep. 11, 1989, pp. 1062-1064.
Fan et al., IEEE J. Quant. Electron., 24(6), Jun. 1988, pp. 924-933, "Spectroscopy and Diode Laser-Pumped Operation of . . . ".
Duczynski et al., Appl. Phys. Lett., 48(23), Jun. 88, "CW Double Cross Pumping of the 5/7-5/8 Transition . . . ", p. 1562.
Fan et al., Opt. Lett., 12(9), Sep. 1987, pp. 678-680, "Continuous-Wave Operation at 2.1 .mu.m of a . . . ".
Lotem et al., IEEE J. Quant. Electron., 24(6) Jun. 1988, pp. 1193-1200, "A 2 .mu.m Holium Laser".

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