Optical fiber isolator and optical fiber laser

Abstract

The embodiment of the invention discloses an optical fiber isolator and an optical fiber laser, and relates to the technical field of lasers. The optical fiber isolator comprises one or more light beam isolation structures, a coupling collimator, a transmitting energy fiber and an output collimator, wherein the transmitting energy fiber is connected with the coupling collimator and the output collimator; the light beam isolation structures comprise diaphragms, first beam splitters, magnetic optically-active crystals, magnets, half wave plates, fixing devices and second beam splitters, wherein the centers of light through holes of the diaphragms and the first beam splitters, the magnetic optically-active crystals, the half wave plates and center shafts of the second beam splitters are located in the same straight line; the optical-axis direction of the first beam splitters is mutually perpendicular to the optical-axis direction of the second beam splitters; the magnetic optically-active crystals are located in magnetic field areas of the magnets; the fixing devices drive the half wave plates to rotate to adjust the optical rotation angles of the half wave plates. The optical fiber isolator is simple in isolation degree structure and convenient to use.

Description

technical field [0001] The technical solutions disclosed in the embodiments of the present invention relate to the technical field of lasers, in particular to optical fiber isolators and optical fiber lasers. Background technique [0002] At present, the power of fiber lasers is increasing, and they are widely used in military, medical, industrial manufacturing and other fields. [0003] The isolator core, which consists of magneto-optical crystals and magnets, is sensitive to temperature. When the ambient temperature changes, the optical rotation angle of the magneto-optical crystal will also change, resulting in a reduction in the isolation of the optical fiber isolator for reverse light and weakening the transmission efficiency of forward light. [0004] In the process of researching the present invention, the inventor found that in the prior art, the reduction of the isolation of the optical fiber isolator is mainly avoided by maintaining the optical rotation angle of t...

AI Technical Summary

Problems solved by technology

To heat the core of the isolator at constant temperature, the fiber optic isolator needs to be equipped with additional heating devices and temperature control devices, which will make the structure of the fiber optic isolator complex and inconvenient to use, and heating the isolator core at a constant temperature for a long time will cause high-temperature demagnetization, making the fiber optic isolator reduced performance of

To change the magnetic field strength of the magnetic rotation optical crystal, the optical fiber isolator needs to be equipped with an additional magnetic field strength control device, which will also lead to a complex structure of the optical fiber isolator and inconvenient use, and the magnetic field strength control device is mainly used to greatly adjust the optical rotation angle of the magnetic rotation optical crystal , the sensitivity of the adjustment is low to the slight change of the optical rotation angle caused by the change of the ambient temperature

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