Pre-chirp management femtosecond pulse laser coherent combination amplification device and system thereof

A technology of femtosecond pulse and coherent synthesis, which is applied in the direction of lasers, laser components, phonon exciters, etc., can solve the problems that the single fiber CPA amplification system cannot output average power and output pulse width, so as to improve the output average power, increase the output pulse energy, and expand the effect

Pending Publication Date: 2021-09-17
INST OF PHYSICS - CHINESE ACAD OF SCI
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] 1. The output pulse width of the optical fiber CPA amplification system is relatively wide, usually greater than 200fs, which cannot meet some applications that require shorter pulses
[0006] 2. Due to the existence of the TMI threshold, a single fiber CPA amplification system cannot output an average power exceeding the TMI threshold

Method used

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  • Pre-chirp management femtosecond pulse laser coherent combination amplification device and system thereof
  • Pre-chirp management femtosecond pulse laser coherent combination amplification device and system thereof

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Embodiment 1

[0089] This embodiment is used to illustrate the structure of the pre-chirp management femtosecond pulse laser coherent synthesis amplification device of the present invention.

[0090] The present invention has strong expansibility, wherein the amplifying module can be easily extended to multiple. For the convenience of drawing and description, this embodiment uses two amplifiers as an example for illustration, and it should not be understood that the present invention is limited to only two channels.

[0091] figure 1 It is a femtosecond pulsed laser coherent synthesis amplification device based on pre-chirp management. It includes: femtosecond laser front-end module 1, pre-chirp management module 2, pulse splitter module 3, fiber amplifier module and pulse combiner module 4, time delay adjustment module 5 and pulse compression module 6. In this embodiment, the femtosecond laser front-end module 1 adopts an ytterbium-doped fiber oscillator that can protect the mode-locking ...

Embodiment 2

[0100] This embodiment is used to illustrate the expansion of the pre-chirp management femtosecond pulse laser coherent synthesis amplification device of the present invention.

[0101] figure 2It is a very expandable demonstration diagram for the femtosecond pulse laser coherent synthesis amplification device based on pre-chirp management. Compared with the coherent combination technology of the above-mentioned two-way pre-chirp management femtosecond pulse, this part only increases the number of channels. Correspondingly, the output power of the femtosecond pulse front-end module needs to be increased, and generally at least the number of channels needs to be multiplied by 4 / 5 of the output power. The pre-chirp management module adds pre-chirp to the front-end output pulse. The beam splitter module only achieves the goal of dividing into several pulses by connecting multiple beam splitter devices in parallel. The main amplifier part is the same as above. The beam combiner...

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Abstract

The invention provides a pre-chirp management femtosecond pulse laser coherent combination amplification device. The device comprises a femtosecond laser front-end module, a pre-chirp management module, a pulse beam splitter module, an optical fiber amplifier module, a pulse beam combiner module, a pulse compression module and a time delay adjustment module. The pre-chirp technology is adopted to increase the spectrum broadening amount, the coherent combination technology is adopted to increase the output average power, and two paths of coherent combination can output sub-50 femtosecond ultrashort pulses with the average power of five hundred watts; meanwhile, the expansibility is high, a plurality of rod-shaped photonic crystal gain optical fibers can be added in parallel on the basis of an existing system to further improve the output average power, and a pulse separation / synthesis unit in time can be added to improve the output pulse energy of the system.

Description

technical field [0001] The invention relates to the field of ultrafast laser technology, in particular to ultrafast fiber laser technology, in particular to a device for generating and amplifying ultrashort femtosecond pulses with high average power. Background technique [0002] Ytterbium-doped fiber laser has the advantages of high average power, excellent heat dissipation performance, high electro-optic conversion efficiency, excellent beam quality, relatively low cost and relatively small space volume, etc. It is widely used in basic science, industrial processing, biomedicine and other fields be more and more widely used. [0003] In order to obtain pulses with high average power while reducing cumulative nonlinearity, on the one hand, ultrafast fiber laser systems generally use chirped pulse amplification (CPA) technology. However, due to the constraints of insufficient bandwidth of the gain medium, gain narrowing in the amplification process, and dispersion compensat...

Claims

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Application Information

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IPC IPC(8): H01S3/067H01S3/11
CPCH01S3/06741H01S3/11H01S3/06754
Inventor 王井上张瑶王军利魏志义常国庆
Owner INST OF PHYSICS - CHINESE ACAD OF SCI
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