Patent ID: 8422520
Filing Date: 2013-04-16
Classification: G02B,H01S

Abstract:
1. A laser light emitting device, comprising: a glass rod including an input end and an output end, the glass rod having a core provided along a central axis thereof and a cladding covering the core, wherein the core and the cladding are adapted such that the core has a higher refractive index than the cladding on the side of the input end, and that a value given through subtraction of the refractive index of the cladding from the refractive index of the core on the side of the output end is smaller than a value given through subtraction of the refractive index of the cladding from the refractive index of the core on the side of the input end, and wherein the laser light emitting device includes an area in which the core has a gradually lowering refractive index with respect to the refractive index of the cladding from the input end side toward the output end side.