Nonlinear fiber and ultrashort pulse generating device applying same

Abstract

The invention discloses a nonlinear fiber and an ultrashort pulse generating device applying the nonlinear fiber, relating to a special fiber and the application field of the special fiber. The nonlinear fiber comprises an external cladding layer, an internal cladding layer and an optical fiber core region, wherein the internal cladding layer is arranged in the external cladding layer; the optical fiber core region is formed by the hollow part in the internal cladding layer; the optical fiber core region is filled with nonlinear gas which is inert gas; and both ends of the optical fiber core region are respectively provided with a packaging window for sealing. The ultrashort pulse generating device comprises a picosecond pulse source, a focusing subsystem, an optical fiber and a dispersion compensating subsystem which are sequentially connected, wherein the optical fiber is the nonlinear optical fiber. The device can increase the anti-damage threshold of the optical fiber so as to increase the optical power density of the maximum unit area of incident light signals and improve the efficiency of optical nonlinear effect and the coupling efficiency, therefore, the optical fiber with low process complexity level and relatively low cost obtains the same or more superior performances.

Description

technical field [0001] The invention relates to special optical fiber and its application field, in particular to a nonlinear optical fiber and an ultrashort pulse generating device using the optical fiber. Background technique [0002] With the gradual increase of investment in information construction and the gradual improvement of information infrastructure, the demand for optical fiber cables and optoelectronic devices in the communication industry and non-communication industries continues to grow, and is showing a trend of diversification. At present, the specifications and types of optical fibers are limited, and it is difficult to To meet various specific needs, special optical fibers with different characteristics and functions are urgently needed to be developed. As an important supplement to the traditional optical fiber industry, special optical fiber has become an industry full of opportunities and challenges, providing a stage for horizontal development and ver...

AI Technical Summary

Problems solved by technology

[0005] To sum up, the current optical fiber generally has the defects of limited fiber incident pulse power, low nonlinear efficiency and coupling efficiency, high process complexity and high production cost.

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