Holmium laser

Coherent light generators – Particular temperature control – Liquid coolant

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H01S 3045

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active

051075130

ABSTRACT:
A solid state holmium laser is described which comprises an elliptical or double-elliptical cavity in which pumping lamp(s) are located along one focal line of the ellipse(s) of a one piece cavity and a holmium laser rod is located along the other fold line of the ellipse(s). The laser rods are held by a rod holder and coupled to a source of coolant and a cooling mantle is provided on a cylindrical body forming the cavity.

REFERENCES:
patent: 3599113 (1971-08-01), Cremosnik
patent: 4858243 (1989-08-01), Bar-Joseph
Kaplan, et al., "Basic Science: The Clinical Potential of the Holmium Laser": Laser: In Medicine and Surgery, 3:207-209 (1987).
K. Mori, "Transient Colour Centres Caused by UV Light Irradiation in Yttrium Aluminum Garnet Crystals," Phys. Stat. Sol., A42:375 (1975).
Devor, et al., "Hydroxyl Impurity Effects in YAG (Y.sub.3 Al.sub.5 O.sub.12)," J. Chem. Phys., 81:4104 (1984).
Gettemy, et al., "Liquid Nitrogen Cooled Laser Rod Holder Design," Rev. Sci. Instrum., 51 (9) (1980).
Chicklis, et al., "High-Efficiency Room-Temperature 2.06-.mu.m Laser Using Sensitized Ho.sup.3+ : YLF," Appl. Phys. Lett., 19:119 (1971).
Johnson, et al., "Coherent Oscillations from Tm.sup.3+, Ho.sup.3+, Yb.sup.3+ and Er.sup.3+ Ions in Yttrium Aluminum Garnet," Appl. Phys. Lett., 7:127 (1965).
Johnson, et al., "Efficient, High-Power Coherent Emission from Ho.sup.3+ Ions in Yttrium Aluminum Garnet, Assisted by Energy Transfer," Appl. Phys. Lett., 8:200 (1966).
Johnson and Ingersoll, "Elimination of Degradation in the Laser Output from Ho.sup.3+ in Sensitized YAG," J. Appl. Phys., 44:5444 (1973).
Beck and Gurs, "Ho Laser with 50-W Output and 6.5% Slope Efficiency," J. Appl. Phys., 46:5225 (1975).

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