A Novel Femtosecond Fiber Amplifier

A femtosecond optical fiber and amplifier technology, applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems of reduced processing accuracy and increased additional tissue damage, and achieve the effect of compact structure and second-order dispersion

Active Publication Date: 2018-08-03
广东华奕激光技术有限公司
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Problems solved by technology

However, if there is an obvious third-order dispersion effect in the amplified pulse, it will lead to the introduction of too much thermal effect in the process of processing the corneal flap, which will seriously reduce the processing accuracy and increase the additional damage to the tissue.

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  • A Novel Femtosecond Fiber Amplifier
  • A Novel Femtosecond Fiber Amplifier
  • A Novel Femtosecond Fiber Amplifier

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Embodiment Construction

[0025] The features of the present invention and other related features will be further described in detail below in conjunction with the accompanying drawings through the embodiments, so as to facilitate the understanding of those skilled in the art:

[0026] Such as figure 1 As shown, a new type of femtosecond fiber amplifier includes a femtosecond oscillation output module for outputting linearly polarized light with positive dispersion, a precompression module for precompressing and obtaining a certain negative dispersion light, and a A double-clad fiber amplification module for energy amplification and self-phase adjustment to suppress third-order dispersion, and a secondary compression module for output after secondary compression.

[0027] Such as figure 2 As shown, the femtosecond oscillation output module includes a femtosecond oscillation source 1, a first half-wave plate 2, and a first polarization beam splitter cube 3 arranged in sequence, and the first polarizat...

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Abstract

The invention discloses a novel femtosecond optical fiber amplifier, which is characterized by comprising a femtosecond oscillation output module arranged in sequence for outputting linearly polarized light with positive dispersion, and a precompression for precompressing and obtaining a certain negative dispersion light. module, a double-clad optical fiber amplification module for energy amplification and self-phase adjustment to suppress third-order dispersion, and a secondary compression module for output after secondary compression. The structure of this case is compact, and two compression modules are used, which can be adjusted in conjunction to obtain the best output pulse shape. First, a small amount of negative dispersion is pre-introduced in the femtosecond oscillation output module. At the same time, the side lobe energy caused by the third-order dispersion of the amplified optical pulse is weakened, and a pulse with an approximate shape of the Fourier transform limit is obtained, which is very suitable for the micromachining industry that is very sensitive to thermal effects.

Description

[technical field] [0001] The invention relates to a novel femtosecond optical fiber amplifier. [Background technique] [0002] High-power femtosecond lasers have great application prospects in industrial processing, biology and medicine. Compared with solid-state mode-locked lasers, fiber lasers have the following significant advantages: low cost, small size, high efficiency, high beam quality, and high stability. The difference between femtosecond laser amplification based on optical fiber technology and ordinary solid-state amplification is that the high surface area to volume ratio of optical fiber can effectively enhance heat dissipation, and there is no need to introduce water cooling and other means in medium and small power amplification. In recent years, emerging femtosecond laser applications represented by femtosecond laser corneal surgery have put forward new requirements for lasers. In these applications, the single pulse energy of the femtosecond laser is requ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/067H01S3/094
Inventor 李莹刘关玉朱海波汤燕鹏
Owner 广东华奕激光技术有限公司
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