Linear-core-array optical fiber based laser beam shape convertor

2011 ◽  
Author(s):  
Libo Yuan ◽  
Xiaoliang Zhu ◽  
Ai Zhou ◽  
Qiang Dai ◽  
Fengjun Tian
Keyword(s):  
Laser Beam ◽  
Optical Fiber ◽  
Beam Shape

ORIENTATING MANIPULATION OF CYLINDRICAL PARTICLES WITH OPTICAL TWEEZERS

2008 ◽  
Vol 17 (04) ◽  
pp. 387-394 ◽  
Author(s):  
XIUDONG SUN ◽  
XUECONG LI ◽  
JIANLONG ZHANG
Keyword(s):  
Escherichia Coli ◽  
Carbon Nanotubes ◽  
Laser Beam ◽  
Optical Tweezers ◽  
Optical Trap ◽  
Polarization Direction ◽  
Beam Shape ◽  
E Coli ◽  
Potential Applications ◽  
Cylindrical Particles

Orientating manipulations of cylindrical particles were performed by optical tweezers. Vertical and horizontal manipulations of Escherichia coli (E. coli) were carried out by changing the trapping depth and the focused laser beam shape. It was found that carbon nanotubes bundles (CNTBs) could be rotated in the linear polarized optical trap until it orientated its long axis along the linear polarization direction of the laser beam. However, E.coli could not be orientated in this way. Corresponding mechanisms were discussed based on the anisomeric electric characters of CNTBs. These orientation technologies of cylindrical objects with optical trap have potential applications in assembling nano-electric devices.

Effect of laser beam shape parameters on photothermal deflection densitometers

1984 ◽  
Vol 56 (9) ◽  
pp. 1674-1677 ◽  
Author(s):  
Tsuey Ing. Chen ◽  
Michael D. Morris
Keyword(s):  
Laser Beam ◽  
Shape Parameters ◽  
Beam Shape ◽  
Photothermal Deflection

Dynamic control of laser beam shape for heat treatment

2018 ◽  
Vol 30 (3) ◽  
pp. 032507 ◽  
Author(s):  
Paula Sancho ◽  
M. Angeles Montealegre ◽  
Jesús Dominguez ◽  
Piera Alvarez ◽  
Juan Isaza
Keyword(s):  
Heat Treatment ◽  
Laser Beam ◽  
Dynamic Control ◽  
Beam Shape

Enhancing laser beam directional stability by single-mode optical fiber and feedback control of drifts

2005 ◽  
Vol 76 (3) ◽  
pp. 036101 ◽  
Author(s):  
Weiqian Zhao ◽  
Jiubin Tan ◽  
Lirong Qiu ◽  
Limin Zou ◽  
Jiwen Cui ◽  
...  
Keyword(s):  
Feedback Control ◽  
Laser Beam ◽  
Optical Fiber ◽  
Single Mode ◽  
Single Mode Optical Fiber ◽  
Directional Stability

Influence of Excimer Laser Beam Shape on Poly-Si Crystallisation

2004 ◽  
Vol 43 (8A) ◽  
pp. 5114-5121 ◽  
Author(s):  
S. D. Brotherton ◽  
D. J. McCulloch ◽  
J. P. Gowers
Keyword(s):  
Laser Beam ◽  
Excimer Laser ◽  
Beam Shape

Underwater 3D Imaging Using a Fiber-Based Endoscopic System for Arthroscopic Surgery

2016 ◽  
Vol 20 (3) ◽  
pp. 448-454 ◽  
Author(s):  
Zhongjie Long ◽  
◽  
Kouki Nagamune ◽  
◽  
Keyword(s):  
Minimally Invasive ◽  
Laser Beam ◽  
Optical Fiber ◽  
3D Imaging ◽  
Arthroscopic Surgery ◽  
Three Dimensional ◽  
Small Diameter ◽  
Knee Joints ◽  
Minimally Invasive Surgical Procedure ◽  
Minimally Invasive Surgical

Arthroscopic surgery is a minimally invasive surgical procedure that is widely used on joints. However, conventional endoscope-based arthroscopic surgery does not provide stereoscopic information to the surgeon. To overcome this limitation, we have developed a modified endoscopic system that uses an optical fiber (1 mm diameter) for three-dimensional imaging of knee joints. Our endoscopic system is able to operate underwater in real time. It consists of a laser beam that is projected on the surface of the object to be imaged via an optical fiber. A prism is used to decrease the length and diameter of baseline and endoscope tube, respectively. The small diameter (8 mm) of our endoscope makes it extremely convenient for application in arthroscopic surgery. The feasibility of the proposed system has been demonstrated via experiments on synthetic knee joints.

Degradation of beam quality and depolarization of the laser beam in a step-index multimode optical fiber

Optik ◽  
2009 ◽  
Vol 120 (12) ◽  
pp. 585-590 ◽  
Author(s):  
Yage Zhan ◽  
Qinyu Yang ◽  
Hua Wu ◽  
Jianqiu Lei ◽  
Peihui Liang
Keyword(s):  
Laser Beam ◽  
Optical Fiber ◽  
Beam Quality ◽  
Multimode Optical Fiber ◽  
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