Patent ID: 6829256
Filing Date: 2004-12-07
Classification: H01S

Abstract:
A fiber laser apparatus, comprising:a first excitation light source; a first optical fiber on which light from the first excitation light source is incident through one facet of the first optical fiber, in which light resonance with predetermined wavelength selected in advance occurs in a core doped with a rare earth substance, and in which a light resonant section is formed to output light of a resonant wavelength from the other facet of the first optical fiber; a second excitation light source; an optical multi/demultiplexer, including: a first facet on which light of a predetermined wavelength emitted from the other facet of the first optical fiber is incident, a second facet which is provided at a predetermined angle to the first facet, and a third facet, which is provided opposite to the first facet, and on which light emitted from the second excitation light source is incident, the optical multi/demultiplexer emitting the light of a predetermined wavelength incident on the first facet from the second facet as well as causing the light, which was emitted from the second excitation light source and incident into the third facet, to pass through the first facet and to be supplied to the light resonant section from the other facet of the first optical fiber; and a second optical fiber which guide the light of a predetermined wavelength emitted from the second facet of the optical multi/demultiplexer to the exterior.