Ultrashort laser pulse time domain compression device and method

A technology of ultra-short laser and compression device, which is applied to lasers, laser components, semiconductor lasers, etc., and can solve problems such as insufficient pulse time-domain compression methods

Inactive Publication Date: 2018-09-14
HUAZHONG UNIV OF SCI & TECH
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  • Abstract
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problem that the existing pulse time-domain compression method based on the grating pair or the prism pair is insufficient

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  • Ultrashort laser pulse time domain compression device and method
  • Ultrashort laser pulse time domain compression device and method
  • Ultrashort laser pulse time domain compression device and method

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Embodiment Construction

[0079] The present invention will be further described below in conjunction with example and accompanying drawing, but should not limit protection scope of the present invention with this.

[0080] Femtosecond pulse shaping as a complement to ultrafast pulse generation has now been widely used in ultrafast optics and ultrafast technology. At present, in the ultrashort pulse shaping technology, the Fourier space-time transform 4f pulse shaping unit is the most common. The 4f pulse shaping unit is a frequency-domain shaping method. The fundamental reason for femtosecond laser pulse shaping is that it has a wide spectral band, and the 4f shaper using the Fourier space-time transform method can transform the frequency of the time-domain pulse in the spatial spectrum Spreading on the surface is wide enough, that is, the space-time conversion is performed to realize pulse shaping in the frequency domain, which is convenient for placing the spatial light modulator for spatial filteri...

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Abstract

The invention relates to an ultrashort laser pulse time domain compression device and method. The device comprises a femtosecond laser oscillator, a Faraday isolator, a first objective lens, a high nonlinear photonic crystal fiber, a second objective lens and a 4f pulse shaping unit. Femtosecond pulses emitted by the femtosecond laser oscillator pass through the Faraday isolator and then are coupled into the high nonlinear photonic crystal fiber through the first objective lens to generate continuous spectral pulses. The continuous spectral pulses are collimated by the second objective lens and then enter the 4f pulse shaping unit. The 4f pulse shaping unit is configured to measure and compensate the frequency-domain phase distortion of the continuous spectral pulses, and compress the continuous spectral pulses. The frequency-domain phase distortion is determined by phase interference scanning in the multi-photon pulses. The ultrashort laser pulse time domain compression device and method greatly improve the precision of the pulse time-domain compression by using the frequency-domain 4f pulse shaping unit.

Description

technical field [0001] The invention belongs to the field of optical ultrafast pulses, and more specifically relates to a time-domain compression device and method for ultrashort laser pulses. Background technique [0002] Ultrashort pulse applications range from ultra-high-speed semiconductor device testing to material precision processing, from excitation-tracking chemical reactions to complex biomedical applications, allowing researchers to study with unprecedented light intensity levels and temporal resolution Interaction of light and matter. The most direct application of ultrashort pulse is to use it as a light source to develop a variety of time-resolved spectroscopy techniques and pump detection techniques. Its development directly drives the research of physics, chemistry, biology, materials and information science into the field of ultrafast processes, creating Such as femtosecond chemistry, quantum-controlled semiconductor coherence spectroscopy, etc. [0003] S...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/00G02F1/09
CPCG02F1/093H01S5/0057
Inventor 付玲骆清铭崔权陈忠云
Owner HUAZHONG UNIV OF SCI & TECH
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