Basic experiments of laser beam correction by adaptive optics microscope for the accurate manipulation of biological tissues

2017 ◽  
Author(s):  
Masayuki Hattori ◽  
Yosuke Tamada ◽  
Shin Oya ◽  
Yutaka Hayano ◽  
Yasuhiro Kamei
Keyword(s):  
Laser Beam ◽  
Adaptive Optics ◽  
Biological Tissues ◽  
Basic Experiments

scholarly journals 1178 J, 527 nm near diffraction limited laser based on a complete closed-loop adaptive optics controlled off-axis multi-pass amplification laser system

2021 ◽  
Vol 9 ◽  
Author(s):  
Deen Wang ◽  
Xin Zhang ◽  
Wanjun Dai ◽  
Ying Yang ◽  
Xuewei Deng ◽  
...  
Keyword(s):  
Laser Beam ◽  
Adaptive Optics ◽  
Closed Loop ◽  
Focal Spot ◽  
Beam Quality ◽  
Laser System ◽  
Diffraction Limit ◽  
Kdp Crystal ◽  
Main Amplifier

Abstract A 1178 J near diffraction limited 527 nm laser is realized in a complete closed-loop adaptive optics (AO) controlled off-axis multi-pass amplification laser system. Generated from a fiber laser and amplified by the pre-amplifier and the main amplifier, a 1053 nm laser beam with the energy of 1900 J is obtained and converted into a 527 nm laser beam by a KDP crystal with 62% conversion efficiency, 1178 J and beam quality of 7.93 times the diffraction limit (DL). By using a complete closed-loop AO configuration, the static and dynamic wavefront distortions of the laser system are measured and compensated. After correction, the diameter of the circle enclosing 80% energy is improved remarkably from 7.93DL to 1.29DL. The focal spot is highly concentrated and the 1178 J, 527 nm near diffraction limited laser is achieved.

Laser beam focusing through the scattering medium by means of adaptive optics

2017 ◽  
Author(s):  
Ilya Galaktionov ◽  
Alexis Kudryashov ◽  
Julia Sheldakova ◽  
Alexander Nikitin
Keyword(s):  
Laser Beam ◽  
Adaptive Optics ◽  
Scattering Medium ◽  
Beam Focusing

Fast and low noise adaptive optics system for the correction of micro-aberrations of laser beam

2007 ◽  
Author(s):  
S. Avino ◽  
E. Calloni ◽  
R. De Rosa ◽  
L. Di Fiore ◽  
L. Milano ◽  
...  
Keyword(s):  
Laser Beam ◽  
Adaptive Optics ◽  
Low Noise ◽  
Adaptive Optics System

Adaptive Optics correction of geometrical fluctuations of Virgo input laser beam: preliminary results

2002 ◽  
Author(s):  
S. Avino ◽  
Fabrizio Barone ◽  
Jeffrey T. Baker ◽  
Enrico Calloni ◽  
Rosario De Rosa ◽  
...  
Keyword(s):  
Laser Beam ◽  
Adaptive Optics ◽  
Preliminary Results

Theoretical Analysis and Basic Experiments for the 3D Displacement Measurement Using Ring-Shaped Laser Beam

2005 ◽  
Vol 295-296 ◽  
pp. 295-300
Author(s):  
S. Usuki ◽  
Kazuyuki Enami ◽  
M. Hiraki ◽  
S. Takahashi ◽  
Kiyoshi Takamasu
Keyword(s):  
Theoretical Analysis ◽  
Laser Beam ◽  
Optical System ◽  
High Sensitivity ◽  
Displacement Measurement ◽  
Contact Method ◽  
New Ideas ◽  
3D Positioning ◽  
The One ◽  
Basic Experiments

For flexible 3D positioning of a complex 3D mechanism, it is needed to measure 3D displacement of the end-effecter of the mechanism in high precision and by non-contact method. It was common to use plural sensors or scales together to measure the 3D displacement. However, it is difficult to calibrate the sensitivities of the plural sensors or scales. A novel 3D displacement measurement is proposed using an optical system in which lens focuses are collected at the center of the sphere, which has been used for the radius measurement of the sphere. Instead of facing in the XY direction that has high sensitivity, new ideas are necessary for the measurement in the Z direction of the optics where focuses are collected at the center of the sphere. The displacement in the XY direction and the one in the Z direction can be measured at the same time by using a ring-shaped laser beam instead of a simple ray.

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