High repetition frequency harmonic wave mode locking fiber laser based on external continuous light injection

Abstract

The invention relates to a high repetition frequency harmonic wave mode locking fiber laser based on external continuous light injection, comprising a laser pumping source, a wavelength division multiplexing device, an optical isolator, a continuous light source, an optical coupler, a saturable absorber and a gain fiber, wherein the laser pumping source is connected to the pumping input terminal of the wavelength division multiplexing device, and the wavelength division multiplexing device is in connection with the optical isolator, and is then connected to the optical coupler together with the continuous light source; the optical coupler comprises a laser signal output terminal and a signal connection output terminal, wherein the signal connection output terminal is successively in connection with the saturable absorber and the gain fiber; the gain fiber is then in connection with the wavelength division multiplexing device; glowing ions are doped in the fiber core of the gain fiber. The high repetition frequency harmonic wave mode locking fiber laser has the characteristics of simple structure and low cost; through the combination between the continuous light source and a passive mode locking fiber laser, high repetition frequency harmonic wave mode locking is realized; in addition, outputted optical pulses possess the advantages of high repetition rate and narrow pulse width.

Description

technical field [0001] The invention relates to a mode-locked fiber laser and belongs to the technical field of fiber lasers. More specifically, the invention relates to a high repetition frequency harmonic mode-locked fiber laser based on external continuous light injection. Background technique [0002] Laser is one of the greatest inventions of mankind in the 20th century. With the development of society, it has become one of the most important tools in scientific research and industrial production. In recent years, ultrashort pulse fiber lasers have become a research hotspot worldwide. Among them, high repetition rate ultrashort pulse lasers are widely used in high-speed optical sampling, optical frequency combs, high-speed shape measurement, and terahertz wave generation. With the innovative development of fiber laser mode-locking theory and the progress of high-doped fiber manufacturing technology, the repetition rate of fiber laser has been significantly improved, bu...

AI Technical Summary

Problems solved by technology

[0003] Based on the above technical problems, the present invention provides a high-repetition-frequency harmonic mode-locked fiber laser based on external continuous light injection, thereby solving the problem of complex structure and high cost of previous fiber lasers, and the inability to generate high-quality, high-frequency optical pulses technical problem

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