Patent ID: 8457164
Filing Date: 2013-06-04
Classification: H01S

Abstract:
1. A fiber laser having a ring-shaped resonator, whereby a first section of the resonator is formed by a light-conducting fiber and a second section of the resonator is formed by an optically pumped amplifier fiber, having an injection point for injecting light of a pump light source into the resonator, and having an extraction point for extracting laser light that has been generated, from the resonator, wherein the resonator has at least one reflective optical component that reflects the laser light that circulates in the resonator, wherein the at least one reflective optical component is a saturable semiconductor mirror or a saturable absorber, wherein the at least one reflective optical component is coupled with the resonator in such a manner that the light that impacts the reflective optical component and the light reflected from the reflective optical component do not interfere with one another, wherein the light that impacts the reflective optical component and the light that is reflected from the reflective optical component propagate in opposite directions, with spatial overlap, at least in a partial segment, whereby the light that impacts the reflective optical component and the light reflected by the reflective optical component differ with regard to polarization state on the partial segment, wherein the laser light that circulates in the resonator is extracted from the light-guiding fiber or the amplifier fiber by way of a polarization beam splitter, passed to the reflective optical component, and passed back into the light-conducting fiber or the amplifier fiber by way of the polarization beam splitter, and wherein the laser light extracted from the light-guiding fiber and reflected by the reflective optical component passes in opposite directions through a piece of polarization-maintaining optical fiber.