Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Beam splitting and reshaping device of frequency linear chirped pulses

A technology of chirped pulse and shaping device, applied in optical components, optics, instruments, etc., can solve the problems of convex lens chromatic aberration, high requirement of optical path adjustment accuracy, inability to perform optical phase modulation, etc., and achieve the effect of compact structure

Inactive Publication Date: 2013-05-08
SHANGHAI NORMAL UNIVERSITY
View PDF3 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the ultrashort pulse laser in the prior art has a very wide frequency spectrum, and the convex lens will cause serious chromatic aberration, resulting in an unsatisfactory output pulse waveform
In addition, the damage threshold of the spatial light modulator is low, and the high-power ultrashort pulse incident will be damaged and the optical phase modulation cannot be performed. In addition, multiple separate optical elements are used in the experiment, which requires high precision of optical path adjustment and poor stability. These disadvantages limit the application of 4F structure

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Beam splitting and reshaping device of frequency linear chirped pulses
  • Beam splitting and reshaping device of frequency linear chirped pulses
  • Beam splitting and reshaping device of frequency linear chirped pulses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0015] see figure 1 , figure 2 A frequency linear chirped pulse beam splitting and shaping device shown includes an incident frequency linear chirped pulse 1, a set of multiplexed volume holographic gratings 3 and a set of shaped volume holographic gratings 4, all integrated in a photorefractive crystal plate In 2, chirped pulses 5 with different center frequencies and spectral widths are output after beam splitting and shaping.

[0016] Assume that the incident pulse is a vertically polarized linearly chirped Gaussian pulse with a center wavelength of 1.06 μm, a linear chirp coefficient C=2, and an incident angle of 10.18°. The multiplexed volume holographic grating 3 includes three volume holographic gratings VG 01 , VG 02 , VG 03 , the angles between their grating vectors and the z-axis are 89.8°, 90°, and 90.2° respec...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a beam splitting and reshaping device of frequency linear chirped pulses. The beam splitting and reshaping device of the frequency linear chirped pulses comprises a photorefractive crystal flat plate, multiplexing body holographic gratings and reshaping body holographic gratings, the multiplexing body holographic gratings are different in grating vector direction and identical in other characteristic parameters, the reshaping body holographic gratings are different in grating separation distance and identical in other characteristic parameters, the multiplexing body holographic gratings and the reshaping body holographic gratings are respectively placed behind all the chirped pulse laser to reshape the pulses. According to the beam splitting and reshaping device of the frequency linear chirped pulses, the multiplexing body holographic gratings and the reshaping body holographic gratings are integrated into a single-block photorefractive crystal flat plate, the structure is compact, performance is stable and reliable, the wavelength division multiplexing technology and the reshaping technology of the holographic gratings are combined in an organic mode, frequency shift and reshaping can be achieved for general chirped pulses and laser pulses, the beam splitting and reshaping device of the frequency linear chirped pulses is particularly suitable for a macro-energy high-power chirped pulse system.

Description

technical field [0001] The invention relates to the wavelength division multiplexing and shaping technology of volume holographic grating, more specifically, relates to a frequency linear chirped pulse beam splitting and shaping device. Background technique [0002] Ultrashort pulse laser has the characteristics of high time resolution and rich spectrum, and has been widely used in the fields of strong field physics, ultrafast imaging and laser spectroscopy. Due to the wide spectral characteristics, one can use optical dispersive elements such as prisms or gratings to shape chirped pulses. Volume holographic grating is a kind of diffractive optical element, which has high diffraction efficiency and large information capacity due to its advantages of optical parallel transmission and processing, interference-free cross transmission, three-dimensional beam propagation freedom, and multi-dimensional multiplexing of space and frequency. In addition to the attention paid to opti...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/44G02B27/09G02B27/10
Inventor 闫爱民陈慧丽石旺舟胡志娟朱瑞兴
Owner SHANGHAI NORMAL UNIVERSITY
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com