Nonlinear fiber mirror based on kerr lens effect

Abstract

The application discloses a reflection type nonlinear fiber mirror based on Kerr lens effect, and relates to the technical field of nonlinear optics and fiber laser, which comprises a single-mode optical fiber, a lens group (containing a single lens or a lens group composed of multiple lenses) for collimation and focusing, a nonlinear wafer and a mirror; the light beam output by the single-mode optical fiber is collimated and focused by the lens group, is incident to the nonlinear wafer, and is reflected by the mirror to return to the single-mode optical fiber along the original light path; the nonlinear wafer has a very high nonlinear refractive coefficient, so that the Kerr self-focusing effect is generated when the incident light intensity increases. The application has the advantages of fast response, compact structure, easy integration with the fiber system and the like, improves the integration degree of the system, and is suitable for passive mode locking and intensity-dependent reflection modulation in an ultrafast fiber laser.

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