All-fiber Fabry-Perot cavity fabricated by fs laser line-by-line scanning technique

2021 ◽  
Author(s):  
Luohao Lei ◽  
Hongye Li ◽  
Xiaofan Zhao ◽  
Binyu Rao ◽  
Meng Wang ◽  
...  
Keyword(s):  
Laser Line ◽  
Scanning Technique ◽  
Fabry Perot ◽  
Fs Laser ◽  
Line Scanning

Sapphire fiber Bragg gratings inscribed with a femtosecond laser line-by-line scanning technique

2018 ◽  
Vol 43 (19) ◽  
pp. 4562 ◽  
Author(s):  
Xizhen Xu ◽  
Jun He ◽  
Changrui Liao ◽  
Kaiming Yang ◽  
Kuikui Guo ◽  
...  
Keyword(s):  
Femtosecond Laser ◽  
Fiber Bragg Gratings ◽  
Bragg Gratings ◽  
Laser Line ◽  
Scanning Technique ◽  
Line Scanning ◽  
Sapphire Fiber

scholarly journals Super resolution laser line scanning thermography

2020 ◽  
Vol 134 ◽  
pp. 106279 ◽  
Author(s):  
S. Ahmadi ◽  
P. Burgholzer ◽  
P. Jung ◽  
G. Caire ◽  
M. Ziegler
Keyword(s):  
Super Resolution ◽  
Laser Line ◽  
Line Scanning

Research on the High Precision Laser Line Scanning Measuring System

2007 ◽  
Vol 339 ◽  
pp. 131-135 ◽  
Author(s):  
Jian Jun Ding ◽  
Zhuang De Jiang ◽  
Bing Li ◽  
Jun Jie Guo
Keyword(s):  
High Precision ◽  
Laser Scanning ◽  
Laser Line ◽  
Measuring System ◽  
Surface Measurement ◽  
Iteration Algorithm ◽  
Reconstruction Method ◽  
Loop Feedback ◽  
Axis Position ◽  
Line Scanning

Rapid reverse technology is one of the key technologies with which the enterprises develop new product and occupy the market rapidly. How to realize the reverse measurement and CAD geometry reconstruction rapidly and accurately is always the most important focus for the researchers. Based on the laser scanning technology, the realization principle of the laser line scanning measuring system is presented and the approaches to improve the precision are also analysed in the paper. The self-adaptation adjustment of the probe position can move the light knife image to the optimal imaging area of the CCD according to the calibration result, which will ensure the measurement precision of the CCD image. With the inner velocity loop and outer position loop feedback control, the simple axis position precision of the mechanical system can be controlled within 5um. In order to pick up the points of the light knife centre rationally and exactly, the reconstruction-disperse iteration algorithm is put forward. After processed by different iteration times, the optimal points can be obtained. The reconstruction method of curve and surface based on NURBS is also given. The paper presents the application and realization of the system at last, which realizes the curve and surface measurement with high precision.

Microscope vision system based on micro laser line scanning for characterizing microscale topography

2020 ◽  
Vol 59 (13) ◽  
pp. D189 ◽  
Author(s):  
Francisco Carlos Mejía Alanís ◽  
J. Apolinar Muñoz Rodriguez
Keyword(s):  
Vision System ◽  
Laser Line ◽  
Line Scanning

scholarly journals Absorption spectroscopy of trapped rubidium atoms

2004 ◽  
Vol 82 (11) ◽  
pp. 905-916 ◽  
Author(s):  
S Cauchi ◽  
A Vorozcovs ◽  
M Weel ◽  
S Beattie ◽  
O Gagnon ◽  
...  
Keyword(s):  
Absorption Spectrum ◽  
Line Width ◽  
Optical Pumping ◽  
Laser Line ◽  
Trapped Atoms ◽  
Rubidium Atoms ◽  
Fabry Perot ◽  
Measured Absorption ◽  
High Finesse ◽  
Laser Line Width

We determine the absolute density of a sample of laser-cooled atoms in a two-level system by recording the absorption spectrum of the 85Rb 5S1/2 (F = 3, mf = 3) → 5P3/2 (F′ = 4, m′f = 4) transition. Trapped atoms were prepared in the (F = 3, mf = 3) ground state through optical-pumping techniques. We compare our results with an independent measure of the density that relies on a direct measurement of the number of atoms and size of the atomic sample. We also study the contributions of power broadening, laser line width, and Doppler broadening to the measured absorption spectrum. Our studies suggest that the natural line width (~6 MHz) can be measured to a precision of less than ~50 kHz if the laser line width is measured in real-time with a high-finesse Fabry–Perot cavity. PACS Nos.: 32.70.Cs, 32.70.Jz, 32.80.Pj, 42.62.Fi, 32.70.–n, 32.30.–r

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