Generation of multiwavelength light pulses by femtosecond Bessel laser beam in silica glass (Conference Presentation)

2019 ◽  
Author(s):  
Weiwei Liu
Keyword(s):  
Laser Beam ◽  
Silica Glass ◽  
Light Pulses

Generation of Multi-Wavelength Light Pulses by Femtosecond Bessel Laser Beam in Silica Glass

2019 ◽  
Vol 31 (11) ◽  
pp. 837-840 ◽  
Author(s):  
Dan Lu ◽  
Weiwei Liu ◽  
Qiang Su ◽  
Pengfei Qi ◽  
Zhiqiang Yu ◽  
...  
Keyword(s):  
Laser Beam ◽  
Silica Glass ◽  
Light Pulses ◽  
Multi Wavelength ◽  
Wavelength Light

scholarly journals Time-resolved Visualization of Laser Beam Melting of Silica Glass Powder

2016 ◽  
Vol 83 ◽  
pp. 1013-1020 ◽  
Author(s):  
I. Zhirnov ◽  
R.S. Khmyrov ◽  
C.E. Protasov ◽  
A.V. Gusarov
Keyword(s):  
Laser Beam ◽  
Silica Glass ◽  
Glass Powder ◽  
Time Resolved ◽  
Laser Beam Melting

scholarly journals Theoretical study to find the thermal stress and strain generated in the Wood silica using lasers

2005 ◽  
Vol 2 (1) ◽  
pp. 73-80
Author(s):  
Baghdad Science Journal
Keyword(s):  
Thermal Stress ◽  
Laser Beam ◽  
Silica Glass ◽  
Thermal Stresses ◽  
Research Study ◽  
Theoretical Study ◽  
Stress And Strain ◽  
Soda Glass ◽  
Glass Silica ◽  
Thermal Stress And Strain

In this research study theory to find the stress and emotion gases in the glass as a result of exposure to pulses of the laser beam has been the study using vehicles three major on-system axes cylindrical (r, 0, z), where I took three models of glass silica glass soda glass fused and shedtwo types of lasers where the study showed that the thermal stresses and emotions ...

Void formation in bulk silica glass by fiber fuse induced with a focused laser beam

2021 ◽  
Vol 127 (12) ◽  
Author(s):  
Shun Sato ◽  
Hirofumi Hidai ◽  
Souta Matsusaka ◽  
Akira Chiba ◽  
Noboru Morita
Keyword(s):  
Laser Beam ◽  
Silica Glass ◽  
Void Formation ◽  
Bulk Silica

Two-photon excitation microscopy in cellular biophysics

1995 ◽  
Vol 53 ◽  
pp. 62-63
Author(s):  
David W. Piston ◽  
Brian D. Bennett ◽  
Robert G. Summers
Keyword(s):  
Confocal Microscopy ◽  
Laser Beam ◽  
Duty Cycle ◽  
Excited Electronic State ◽  
Input Power ◽  
Two Photon ◽  
Simultaneous Absorption ◽  
Photon Excitation ◽  
Very High ◽  
Two Photon Excitation

Two-photon excitation microscopy (TPEM) provides attractive advantages over confocal microscopy for three-dimensionally resolved fluorescence imaging and photochemistry. Two-photon excitation arises from the simultaneous absorption of two photons in a single quantitized event whose probability is proportional to the square of the instantaneous intensity. For example, two red photons can cause the transition to an excited electronic state normally reached by absorption in the ultraviolet. In practice, two-photon excitation is made possible by the very high local instantaneous intensity provided by a combination of diffraction-limited focusing of a single laser beam in the microscope and the temporal concentration of 100 femtosecond pulses generated by a mode-locked laser. Resultant peak excitation intensities are 106 times greater than the CW intensities used in confocal microscopy, but the pulse duty cycle of 10-5 maintains the average input power on the order of 10 mW, only slightly greater than the power normally used in confocal microscopy.

The atomic-force microscope and its future in biology

1993 ◽  
Vol 51 ◽  
pp. 704-705
Author(s):  
Jean-Paul Revel
Keyword(s):  
Silicon Nitride ◽  
Laser Beam ◽  
Atomic Force Microscope ◽  
Scanning Tunneling Microscope ◽  
Point Of View ◽  
Scanning Tunneling ◽  
Close Relative ◽  
Tunneling Microscope ◽  
Atomic Force ◽  
Sharp Point

The last few years have been marked by a series of remarkable developments in microscopy. Perhaps the most amazing of these is the growth of microscopies which use devices where the place of the lens has been taken by probes, which record information about the sample and display it in a spatial from the point of view of the context. From the point of view of the biologist one of the most promising of these microscopies without lenses is the scanned force microscope, aka atomic force microscope.This instrument was invented by Binnig, Quate and Gerber and is a close relative of the scanning tunneling microscope. Today's AFMs consist of a cantilever which bears a sharp point at its end. Often this is a silicon nitride pyramid, but there are many variations, the object of which is to make the tip sharper. A laser beam is directed at the back of the cantilever and is reflected into a split, or quadrant photodiode.

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