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Femtosecond vortex pulse generator

A technology for generating devices and vortexes, which is applied in the field of vortex light, can solve the problems of wide output pulse time domain width, low single pulse energy, and high device complexity, and achieve the effect of simple device and high single pulse energy

Inactive Publication Date: 2018-11-30
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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Problems solved by technology

The traditional method of generating period-level high-energy femtosecond vortex pulses, such as the combination of liquid crystal spatial light modulator and OPA system to generate femtosecond vortex pulses, or the combination of OPG system and mode conversion slides to generate femtosecond vortex pulses Pulse, etc., have the disadvantages of high device complexity, wide output pulse time domain width (pulse width), low single pulse energy, etc., which have certain limitations in scientific research and industrial applications.

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  • Femtosecond vortex pulse generator

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Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and preferred implementation examples, but the protection scope of the present invention should not be limited thereby. refer to figure 1 , figure 1 It is an optical path diagram of a femtosecond vortex pulse generating device of the present invention. As can be seen from this figure, a femtosecond vortex pulse generating device of the present invention includes a femtosecond laser 1, a vortex beam generating system 20 for generating a vortex beam, and a hollow-core optical fiber system 30 for obtaining broadband light. A pulse compression system 40 for compensating pulse dispersion; the vortex beam generating system includes a vortex light generating unit 203, and collimating lenses 201 and 202 placed on the optical path between the femtosecond laser 1 and the vortex light generating unit 203; the vortex light The generating unit 203 can be a spiral phase plate, a liqu...

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Abstract

The invention relates to a femtosecond vortex pulse generator, which comprises a vortex beam generation system, a hollow-core fiber system and a pulse compression system, wherein the vortex beam generation system comprises a collimating lens group and a vortex beam generation unit used for transforming a gaussian beam into a vortex beam; the hollow-core fiber system comprises a coupling lens, a cylindrical vacuum chamber and a hollow-core fiber arranged in the vacuum chamber; and the pulse compression system comprises a concave reflector group for carrying out collimating and a pair of chirp mirrors. Only a relatively simple device is used, so that ultra-short and ultra-strong femtosecond vortex laser light can be generated and the femtosecond vortex pulse generator can be applied to the fields of attosecond optics, light filament research and micro-nano machining.

Description

technical field [0001] The invention relates to the technical field of vortex light, in particular to a femtosecond vortex pulse generating device. Background technique [0002] Vortex beams have broad application prospects in the fields of micro-nano processing and optical communication because their photons carry orbital angular momentum and have a special hollow light intensity distribution. The period-level femtosecond vortex laser with high single pulse energy has the characteristics of wide spectral bandwidth, narrow pulse width and high peak power, and it plays an important role in the research fields of attosecond optics and optical filaments. The traditional method of generating period-level high-energy femtosecond vortex pulses, such as the combination of liquid crystal spatial light modulator and OPA system to generate femtosecond vortex pulses, or the combination of OPG system and mode conversion slides to generate femtosecond vortex pulses Pulse, etc., have the...

Claims

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Application Information

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IPC IPC(8): H01S3/00
CPCH01S3/005H01S3/0057
Inventor 刘军林磊王鹏
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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