Holmium doped 2.1 micron crystal laser

Details Holmium doped 2.1 micron crystal laser Holmium doped 2.1 micron crystal laser

2007-10-23

2007-10-23

Harvey, Minsun Oh (Department: 2828)

Coherent light generators

Particular pumping means

Pumping with optical or radiant energy

C372S070000

Reexamination Certificate

active

11029705

ABSTRACT:
A Ho:YAG crystal laser is disclosed which is doped with less than 2% holmium to reduce the lasing threshold and up-conversion, thereby increasing the operating efficiency of the laser. The laser does not need sensitizer ions so energy mismatches introduced by the sensitizer ions ale eliminated to the thereby increase the efficiency of the laser while minimizing detrimental thermal loading in the laser caused by up-conversion loss processes. The Ho:YAG crystal laser is directly pumped by a Thulium fiber laser at 1.9 μm at the holmium5I7to5I8transition to produce an output at 2.1 μm yielding a very low quantum defect. The laser is embodied as a thulium fiber laser pumped oscillator or an amplifier.

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patent: 6583927 (2003-06-01), Choi et al.
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PCT International Search Report dated Nov. 27, 2006 of International Application No. PCT/US2005/046052 filed Dec. 20, 2005.

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