A preparation method and device for femtosecond filament interference direct writing chirped volume grating
A femtosecond filament and volume grating technology, applied in diffraction gratings, optomechanical equipment, hologram light source/light characteristics and other directions, can solve the problems of high production cost, insufficient quality stability, complex glass volume grating preparation process, etc. The effect of simplifying the manufacturing process and reducing the cost
Active Publication Date: 2022-05-10
CHONGQING INST OF EAST CHINA NORMAL UNIV +1
View PDF8 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Although this processing method is easy to process any planar shape structure, the accuracy of the laser scanning path has higher requirements on the stability of the motor movement, and the method of point-by-point ablation is not suitable for large-area grating preparation
[0005] The preparation process of the existing glass grating is complex, the production cost is high, and the quality stability is insufficient
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 moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0039] See attached Figure 8 , a beam of ultrashort pulse laser is output from the femtosecond pulse laser 100, the center wavelength of which is 800nm, the pulse width is about 100fs, and the spectral width is about 40nm. Then, through the first transmission grating 201 and the second transmission grating 202, the original femtosecond pulse becomes a spatially dispersed pulsed laser beam 206 with different wavelength components distributed from short wavelength to long wavelength in space. Then the spatially dispersed pulsed laser beam 206 passes through the first plane reflector 204, the second plane reflector 205 and the third plane reflector 301 to change its path, and is incident on the third diffraction grating 302 to be diffracted and produce angular dispersion, which becomes a space Multiple beams of quasi-monochromatic light distributed linearly. The third diffraction grating 302 is placed at the focal point of the concave mirror 303 . The multiple beams of quasi-mon...
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
| Property | Measurement | Unit |
|---|---|---|
| wavelength | aaaaa | aaaaa |
Login to View More
Abstract
The invention discloses a femtosecond optical filament interference direct writing chirped volume grating preparation method and device, which is characterized in that the optical filament formed in glass by femtosecond pulse laser is used to control the plasma by adjusting the focal length of the focusing lens and the laser energy. The volume is quickly scanned in the glass and etched into a chirped volume grating structure. The device includes: a femtosecond pulse laser module, a pulse chirp management module, a pulse time domain shaping module, a laser separation and interference module, and a glass chirped volume grating processing platform Module and camera online detection module. Compared with the prior art, the present invention has an integrated device design, which can effectively simplify the manufacturing process of chirped volume gratings, effectively reduce the cost of chirped volume grating preparation, and provide chirped volume gratings with large numerical apertures, different reticle specifications, and different glass materials. Volume grating fabrication provides new fabrication methods.
Description
technical field [0001] The invention relates to the technical field of manufacturing optical diffraction elements, in particular to a preparation method and device for a femtosecond optical filament interference direct-writing chirped volume grating. Background technique [0002] Grating devices have the characteristics of diffracting incident light beams, and can be used for beam splitting, pulse broadening and pulse compression, etc., and are widely used in the fields of spectral measurement, optical calculation, optical information processing, and laser amplification systems. At present, the commonly used grating production methods include mechanical scribing, ion beam scribing, template replication, holographic illumination, etc. Among them, the holographic method has high production efficiency and relatively low cost, so it is more popular. The holographic method uses two laser beams to interfere on the surface or inside of the photosensitive glass to form periodic inte...
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
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G02B5/18
CPCG02B5/1857G03H2222/33G03H2222/36G03H2222/23G03H2001/0268G03H2260/62G03H1/024G03H2240/52G03H1/0402G03H2223/23G02F1/3511G03F7/2053
Inventor 曾和平南君义胡梦云闫明
Owner CHONGQING INST OF EAST CHINA NORMAL UNIV