Patent ID: 6798792
Filing Date: 2004-09-28
Classification: H01S

Abstract:
A laser device, comprising:an optical fiber containing a laser activating substance inside for emitting a laser beam from a distal end portion thereof, at least part of said optical fiber being fixed in a dense state by an optical medium; and a laser light source for exciting said optical fiber by emitting an exciting light, wherein the optical medium is obtained by curing an oligomer substance so as to be changed to a polymer substance, said oligomer substance being substantially the same as said polymer substance, said polymer substance including a repeating unit represented by an empirical formula RSiO1.5 wherein said RSiO1.5 is selected from the group consisting of a polymethyl silsesquioxane, a polymethyl-hydride silsesquioxane, a polyphenyl silsesquioxane, a polyphenyl-methyl silsesquioxane, a phenyl silsesquioxane-dimethyl siloxane copolymer, a polyphenyl-vinyl silsesquioxane, polycyclohexyl silsesquioxane, a polycyclopentyl silsesquioxane, a polyhydride silsesquioxane, a poly(2-chloro ethyl) silsesquioxane, a poly(2-bromo ethyl) silsesquioxane, mixtures thereof and a mixture of at least one said RSiO1.5 and a polysiloxane.