A high-power optical fiber acousto-optic modulator and fiber laser

Abstract

The invention belongs to the field of optics and provides an optical fiber acoustic optical modulator. The optical fiber acoustic optical modulator comprises an acoustic optical crystal, a first optical fiber collimator and a second optical fiber collimator, wherein the first optical fiber collimator and the second optical fiber collimator are positioned at two sides of the acoustic optical crystal, the second optical fiber collimator comprises a lens, a two-hole capillary and an outer sealing glass tube, one end, near the acoustic optical crystal, of the lens is a spherical surface, the other end of the lens is an 8-degree inclined surface, one end of the two-hole capillary is an 8-degree inclined surface, and the lens and the two-hole capillary realize the butt joint through the 8-degree inclined surface; the parallel leaned first and second optical fibers are accommodated in the two-hole capillary, the diameter of the first and second optical fibers is 0.125mm, the lens is made of N-SF11, the length of the lens is 10.49 to 10.5mm, and the curvature radius of the spherical surface is 4.94mm. The optical fiber acoustic optical modulator adopts two fiber collimators as receiving components of zero-level light and first-level light so that the zero-level light and the first-level light are precisely coupled to the first and second optical fibers. The optical fiber acoustic optical modulator has the advantages that the product length is shortened, the power bearing capability is improved, the overheating problem of the acoustic optical modulator is solved, and the product reliability is improved.

Description

technical field [0001] The invention belongs to the field of optical technology, in particular to an optical fiber acousto-optic modulator and a fiber laser. Background technique [0002] Fiber laser is known as an emerging technology in the laser field. Because of its small size, high output power, and good spot quality, it has gradually replaced other traditional lasers in many fields. In recent years, it has become a hot spot for international research. Its rapid development and wide application have received great attention. The fiber optic acousto-optic modulator is one of the main components of the fiber laser, which is equivalent to a high-speed optical switch and is used to control the pulsed laser output. [0003] The basic structure of conventional optical fiber acousto-optic modulator is as attached figure 1 As shown, it includes an acousto-optic crystal 103 and a first fiber collimator 101 and a second fiber collimator 102 located at its two ends. The first and...

AI Technical Summary

Problems solved by technology

Therefore, the light baffle used in the conventional solution bears most of the laser energy, resulting in a high local temperature at the end of the product, resulting in a low power bearing capacity of the product. The existing acousto-optic modulator can only withstand power of 3-5W, and its reliability is not high. And it will affect the output power of some high-power lasers, which is another important defect of the prior art

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