Conduction cooled narrow linewidth sub-nanosecond multi-beam laser

2021 ◽  
Vol 17 (9) ◽  
pp. 518-522
Author(s):  
Yong Cheng ◽  
Chaoyong Tan ◽  
Xu Liu ◽  
Xia Chen ◽  
Mengzhen Zhu ◽  
...  
Keyword(s):  
Narrow Linewidth ◽  
Beam Laser

Structural and Electrical Characterization of Shaped Beam Laser Recrystallized Polysilicon on Amorphous Substrates

1981 ◽  
Vol 4 ◽  
Author(s):  
T. J. Stultz ◽  
J. F. Gibbons
Keyword(s):  
Grain Size ◽  
Electrical Characterization ◽  
Grain Structure ◽  
Electrical Characteristics ◽  
Shaped Beam ◽  
Beam Laser ◽  
Cw Laser ◽  
Amorphous Substrates ◽  
Circular Beam

ABSTRACTStructural and electrical characterization of laser recrystallized LPCVD silicon films on amorphous substrates using a shaped cw laser beam have been performed. In comparing the results to data obtained using a circular beam, it was found that a significant increase in grain size can be achieved and that the surface morphology of the shaped beam recrystallized material was much smoother. It was also found that whereas circular beam recrystallized material has a random grain structure, shaped beam material is highly oriented with a <100> texture. Finally the electrical characteristics of the recrystallized film were very good when measured in directions parallel to the grain boundaries.

638 nm narrow linewidth diode laser with a grating external cavity

2020 ◽  
Vol 13 (6) ◽  
pp. 1-8
Author(s):  
LIU Ye ◽  
◽  
LIU Yu ◽  
XIAO Hui-dong ◽  
LI Hong-ling ◽  
...  
Keyword(s):  
Diode Laser ◽  
External Cavity ◽  
Narrow Linewidth

Narrow-linewidth laser with a prism grating/GRIN rod lens combination serving as external cavity

1987 ◽  
Vol 23 (10) ◽  
pp. 524-525 ◽  
Author(s):  
J. Wittmann ◽  
G. Gaukel
Keyword(s):  
External Cavity ◽  
Narrow Linewidth

Dual-beam laser welding of AZ31B magnesium alloy in zero-gap lap joint configuration

2014 ◽  
Vol 56 ◽  
pp. 247-255 ◽  
Author(s):  
Masoud Harooni ◽  
Blair Carlson ◽  
Radovan Kovacevic
Keyword(s):  
Magnesium Alloy ◽  
Laser Welding ◽  
Lap Joint ◽  
Joint Configuration ◽  
Az31b Magnesium Alloy ◽  
Beam Laser ◽  
Dual Beam

scholarly journals 422 Million intrinsic quality factor planar integrated all-waveguide resonator with sub-MHz linewidth

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Matthew W. Puckett ◽  
Kaikai Liu ◽  
Nitesh Chauhan ◽  
Qiancheng Zhao ◽  
Naijun Jin ◽  
...  
Keyword(s):  
Quality Factor ◽  
High Capacity ◽  
Precision Spectroscopy ◽  
Narrow Linewidth ◽  
Waveguide Resonator ◽  
Environmental Disturbances ◽  
Fiber Communications ◽  
Intrinsic Quality ◽  
Quality Factor Q ◽  
Quantum Photonics

AbstractHigh quality-factor (Q) optical resonators are a key component for ultra-narrow linewidth lasers, frequency stabilization, precision spectroscopy and quantum applications. Integration in a photonic waveguide platform is key to reducing cost, size, power and sensitivity to environmental disturbances. However, to date, the Q of all-waveguide resonators has been relegated to below 260 Million. Here, we report a Si3N4 resonator with 422 Million intrinsic and 3.4 Billion absorption-limited Qs. The resonator has 453 kHz intrinsic, 906 kHz loaded, and 57 kHz absorption-limited linewidths and the corresponding 0.060 dB m−1 loss is the lowest reported to date for waveguides with deposited oxide upper cladding. These results are achieved through a careful reduction of scattering and absorption losses that we simulate, quantify and correlate to measurements. This advancement in waveguide resonator technology paves the way to all-waveguide Billion Q cavities for applications including nonlinear optics, atomic clocks, quantum photonics and high-capacity fiber communications.

Elimination of blind zone in nanoparticle removal on silicon wafers using a double-beam laser shockwave cleaning process

2021 ◽  
Vol 539 ◽  
pp. 148057
Author(s):  
Shuowen Zhang ◽  
Qingyu Yan ◽  
Jian Lin ◽  
Qunli Zhang ◽  
Yongfeng Lu ◽  
...  
Keyword(s):  
Silicon Wafers ◽  
Cleaning Process ◽  
Blind Zone ◽  
Beam Laser ◽  
Double Beam ◽  
Nanoparticle Removal
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