Novel method for generating high-order vector dissipative solitons

Abstract

The invention discloses a novel method for generating high-order vector dissipative solitons, and relates to a method. The novel method includes sequentially connecting a wavelength division multiplexer, an erbium optical fiber, an optical fiber coupler, a polarization controller, an optical circulator and a semiconductor saturable absorption mirror with one another by single-mode passive optical fibers to form a positive dispersion optical fiber ring cavity; connecting an output end of the coupler with the polarization controller and a polarization beam splitter; coupling pump laser to a gain optical fiber by the aid of the wavelength division multiplexer and changing double-refraction of the inside of the cavity to generate basic-order vector dissipative solitons; outputting the basic-order vector dissipative solitons via a port of the optical fiber coupler, then introducing phase difference of integer times 2 pi between two polarization components of each basic-order vector dissipative soliton by the aid of the polarization controller, enabling the polarization components to pass the polarization beam splitter at certain angles and then outputting pulses of the high-order vector dissipative solitons. The novel method has the advantages that a polarization component of each obtained high-order vector dissipative soliton is presented as the corresponding single-peak pulse, each other polarization component which is orthogonal to the first polarization component of the corresponding high-order vector dissipative soliton is presented as the corresponding double-peak pulse, and phase difference of pi exists between the two peaks of each high-order vector dissipative soliton.

Description

technical field [0001] The invention relates to a method, in particular to a high-order vector dissipation soliton generation method based on a semiconductor saturable absorption mirror. Background technique [0002] A soliton with multiple soliton components coupled together and propagating in the medium with the same group velocity is called a vector soliton. Single-mode fibers usually have weak birefringence. It can be considered that there are two orthogonal polarization directions in the fiber, so vector solitons may be generated in single-mode fibers. CurtisRMenyuks first predicted the vector soliton in the fiber ([1] C.R.Menyuk, "Stability of solitons in birefringentoptical fibers. I: Equal propagation amplitudes," Opt. Lett.12, 614-616 (1987)). For phase-locked vector solitons, their pulse time-domain shape and polarization state remain unchanged during propagation. For group velocity locked vector solitons, although the fiber birefringence can cause the group velo...

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Problems solved by technology

[0004] In order to solve the problem that there is no generation of high-order vector dissipation solitons at present, the present invention provides a method for generating

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