Radio frequency modulation tunable all-fiber laser based on fiber loop mirror

Abstract

The invention discloses a radio frequency modulation tunable all-fiber laser based on a fiber loop mirror. The radio frequency modulation tunable all-fiber laser based on the fiber loop mirror is characterized in that one arm of the fiber loop mirror, a dual-cladding non-doped fiber, a dual-cladding doped fiber, a signal optical channel of a wavelength division multiplexer and an output tail fiber are sequentially connected in a welding mode end-to-end. A pumping source is connected with a pumping source optical channel of the wavelength division multiplexer in a welding mode. A fiber fixing traction support comprises a left lobe and a right lobe. The dual-cladding non-doped fiber is wound in a groove outside the fiber fixing traction support and tightened. A triangular prism support is arranged on piezoelectric ceramic, and cushion blocks are arranged at the bottom of the piezoelectric ceramic. The piezoelectric ceramic is connected with a radio frequency power source. According to radio frequency modulation tunable all-fiber laser based on the fiber loop mirror, by the adoption of the tuned radio frequency mode, ultrasonic vibration is utilized to form a long period fiber grating with an adjustable period, wavelength tuning of the fiber laser is achieved, a full-fiber structure without discrete component is adopted in the fiber laser, and no inserting loss is generated, so that optical quality is good, output power is high, the structure is compact, performance is stable and reliable, and continuous tuning in a wide range can be achieved.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a fiber laser, in particular to a radio-frequency modulation and tunable all-fiber laser based on a fiber loop mirror. Background technique [0002] Fiber lasers are developing rapidly due to their small size, high efficiency, good stability, and good beam quality. At present, in fiber lasers, the common tunable laser technology is mainly based on rotating grating, compound ring resonance, adjusting the angle of intracavity etalon, using acousto-optic filter, electrically adjustable liquid crystal etalon, fiber grating tuning, fiber ring, sampling grating And polarization control and other technologies, either use a non-full fiber structure, or use a grating that is inconvenient to adjust and has low efficiency, or the adjustment range is relatively narrow, or the output power is too small. Contents of the invention [0003] Aiming at the problems existing in the ex...

AI Technical Summary

Problems solved by technology

At present, in fiber lasers, the common tunable laser technology is mainly based on rotating grating, compound ring resonance, adjusting the angle of intracavity etalon, using acousto-optic filter, electrically adjustable liquid crystal etalon, fiber grating tuning, fiber ring, sampling grating And polarization control and other technologies, either use non-full fiber structure, or the grating used is inconvenient to adjust the efficiency is low, or the adjustment range is relatively narrow, or the output power is too small

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