MODE MIXING OPTICAL FIBERS AND METHODS AND SYSTEMS USING THE SAME

The present disclosure relates more to mode mixing optical fibers useful, for example in providing optical fiber laser outputs having a desired beam product parameter and beam profile. In one aspect,the disclosure provides a mode mixing optical fiber for delivering optical radiation having a wavelength, the mode mixing optical fiber having an input end, an output end, a centerline and a refractive index profile, the mode mixing optical fiber comprising: an innermost core, the innermost core having a refractive index profile; and a cladding disposed about the innermost core, wherein the mode mixing optical fiber has at least five modes at the wavelength, and wherein the mode mixing optical fiber is configured to distribute a fraction of the light input at its input end from its lower-ordermodes to its higher-order modes. 本公开更多地涉及模式混合光纤，所述模式混合光纤可用于例如提供具有期望波束乘积参数和波束分布的光纤激光输出。在个方面，本公开提供种用于传送具有波长的光辐射的模式混合光纤，所述模式混合光纤具有输入端、输出端、中心线和折射率分布，所述模式混合光纤包括：最内芯，所述最内芯具有折射率分布；和包层，所述包层围绕所述最内芯设置，其中所述模式混合光纤在所述波长具有至少五个模式，并且其中所述模式混合