Light emitter and light emitting device
AssigneeKabushiki Kaisha Toshiba
InventorsShinji SAITO, Yasushi Hattori, Rei Hashimoto, Shinya Nunoue
Life of this patent
Estimating the term…
Abstract
A light emitter according to one embodiment has a fiber shape. And it includes a core portion containing a light emitting material, the material absorbing excitation light and emitting light having a wavelength longer than a wavelength of the excitation light. And also it includes a clad portion provided outside the core portion, the clad portion having a first region and second regions, the second regions being periodically formed in the first region, the second regions having a refractive index higher than a refractive index of a first region, the refractive index of the first region being equal to or higher than a refractive index of the core portion.
Claims20
A light emitter having a fiber shape, comprising:
- a core portion containing a light emitting material, the material absorbing excitation light and emitting light having a wavelength longer than a wavelength of the excitation light;
- and
- a clad portion provided outside the core portion, the clad portion having a first region and second regions, the second regions being periodically formed in the first region, the second regions having a refractive index higher than a refractive index of a first region, the refractive index of the first region being equal to or higher than a refractive index of the core portion.
A light emitting device, comprising:
- a laser light source emitting excitation light;
- and
- a light emitter having a fiber shape including a core portion containing a light emitting material, the material absorbing the excitation light and emitting light having a wavelength longer than a wavelength of the excitation light, and a clad portion provided outside the core portion, the clad portion having a first region and second regions, the second regions being periodically formed in the first region, the second regions having a refractive index higher than a refractive index of a first region, the refractive index of the first region being equal to or higher than a refractive index of the core portion,
- wherein the excitation light is incident from an end face of the light emitter, and light emitted from the light emitting material is extracted from the external surface of the clad portion.
Dependencies are inferred from the claim text.