Patent ID: 8462429
Filing Date: 2013-06-11
Classification: G02B,H01S

Abstract:
1. An optical combiner comprising: at least one fiber for propagation of pumping light having a core and a clad and configured to propagate pumping light from a pumping light source; a fiber for propagation of laser light having a core and a clad and configured to propagate laser light having a longer wavelength than the pumping light; and a large area fiber having a core and a clad and configured to propagate the laser light and the pumping light, wherein one end surface of the fiber for propagation of laser light and one end surface of the large area fiber are fused such that the core of the fiber for propagation of laser light and the core of the large area fiber overlap in a longitudinal direction of the large area fiber, one end surface of the fiber for propagation of pumping light and the one end surface of the large area fiber are fused such that the core of the fiber for propagation of pumping light and the clad of the large area fiber overlap in the longitudinal direction of the large area fiber, and the fiber for propagation of laser light and the fiber for propagation of pumping light are not fused to each other, wherein the fiber for propagation of laser light and the fiber for propagation of pumping light are separated from each other by an open space therebetween at the one end surface of the large area fiber.