Polycrystalline ceramic laser
OwnerYutaka Shimojiinventor
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Abstract
Composite lasers made of contiguous layers of pure and doped polycrystalline ceramics are introduced. The close thermal contact between such layers of the same ceramic allows an efficient and low cost way to take full advantage of the higher allowed dopant concentrations and, therefore, of the higher maximum output laser power afforded by polycrystalline ceramic lasers. Many novel, unique examples are provided, which demonstrate the versatility and commercial merit of polycrystalline ceramic composite lasers.
Claims13
A polycrystalline ceramic composite laser system comprising a ceramic composition having at least one hot-pressed sintered polycrystalline doped portion made of said ceramic composition, and at least one hot-pressed sintered polycrystalline pure portion made of said ceramic composition, said doped portion being coupled and continuous with said pure portion, such that said pure portion is a heat dissipating element to conduct heat away from said doped portion, said doped portion having a dopant ion concentration of at least 2% such that a pump laser light absorption coefficient within said doped portion is at least 15/cm, said doped portion being disposed to receive pump laser light between at least two coatings, a laser cavity existing between said coatings such that said laser cavity includes said doped portion, said doped portion being pumped by at least one pump laser light, said pump laser light being emitted by at least one pump laser means, said doped portion emitting at least one emitted laser beam when pumped by said pump laser light, said at least one emitted laser beam having different wavelength than a wavelength of said pump laser light.
Dependencies are inferred from the claim text.