Space-structured fiber laser based on mode-locking of two-dimensional nanomaterials

Abstract

The invention provides a space structure optical fiber laser based on two-dimensional nanomaterial mode locking. The space structure optical fiber laser comprises a pumping source used for outputting pumping laser, and an annular cavity optical path, wherein one part of the annular cavity optical path consists of gain optical fibers; the space structure optical fiber laser also comprises a two-dimensional nanomaterial saturable absorber used for mode locking, a space structure used for forming nonlinear polarization rotation and realizing hybrid mode locking, and a wavelength division multiplexer used for coupling light into the annular cavity optical path. According to the space structure optical fiber laser based on the two-dimensional nanomaterial mode locking provided by the invention, the space structure optical fiber laser mode locking is realized by adopting the two-dimensional nanomaterial saturable absorber and the space structure for forming nonlinear polarization rotation for realizing the hybrid mode locking; the optical fiber laser is compact and small in structure, relatively low in cost, and applicable to duplication in production and assembling; and the optical fiber laser has the advantages of one-way laser output, high repetition frequency, pulse width lower than 100fs magnitude, high stability, high optical beam quality and the like, so that the optical fiber laser can be widely applied to national defense, industries, medical treatment, scientific research and the like.

Description

technical field [0001] The invention relates to the technical field of fiber lasers, in particular to a spatially structured fiber laser based on two-dimensional nanomaterial mode-locking. Background technique [0002] Since the 1990s, mode-locked fiber lasers have had important applications in ultrafast optics and optical communication systems due to their ability to generate ultrashort pulses. Among them, passively mode-locked fiber lasers usually use the nonlinear effect of intracavity nonlinear devices to modulate the laser to achieve mode-locking. [0003] At present, passive mode-locking based on semiconductor saturable absorber mirror (SESAM) is the most mature and widely used mode-locking technology. However, SESAM mode-locking also has many shortcomings that are difficult to overcome. Based on the defects of the traditional mode-locking technology, a new two-dimensional nanomaterial mode-locking technology emerged as the times require. With the development of nan...

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Problems solved by technology

However, at present, the longest working wavelength and the shortest working wavelength of graphene mode-locked fiber lasers are generated in solid-state lasers, but not in fiber lasers.

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