Near diffraction limit output of a coiled 20/400 μm Yb-doped fiber laser

2020 ◽  
Author(s):  
Xuejiao Wang ◽  
Zehui Wang ◽  
Yusheng Huang ◽  
Qirong Xiao ◽  
Dan Li ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Diffraction Limit

scholarly journals Subwavelength Nanostructuring of Gold Films by Apertureless Scanning Probe Lithography Assisted by a Femtosecond Fiber Laser Oscillator

Nanomaterials ◽  
2018 ◽  
Vol 8 (7) ◽  
pp. 536 ◽  
Author(s):  
Ignacio Falcón Casas ◽  
Wolfgang Kautek
Keyword(s):  
Fiber Laser ◽  
Near Field ◽  
Diffraction Limit ◽  
High Repetition Rate ◽  
Scanning Probe ◽  
Optical Methods ◽  
Laser Source ◽  
Gold Films ◽  
Laser Oscillator ◽  
Scanning Probe Lithography

Optical methods in nanolithography have been traditionally limited by Abbe’s diffraction limit. One method able to overcome this barrier is apertureless scanning probe lithography assisted by laser. This technique has demonstrated surface nanostructuring below the diffraction limit. In this study, we demonstrate how a femtosecond Yb-doped fiber laser oscillator running at high repetition rate of 46 MHz and a pulse duration of 150 fs can serve as the laser source for near-field nanolithography. Subwavelength features were generated on the surface of gold films down to a linewidth of 10 nm. The near-field enhancement in this apertureless scanning probe lithography setup could be determined experimentally for the first time. Simulations were in good agreement with the experiments. This result supports near-field tip-enhancement as the major physical mechanisms responsible for the nanostructuring.

2.62-kW, 30-GHz Linearly Polarized All-Fiber Laser with Narrow Linewidth and Near-Diffraction-Limit Beam Quality

2019 ◽  
Vol 46 (12) ◽  
pp. 1215001 ◽  
Author(s):  
王岩山 Wang Yanshan ◽  
马毅 Ma Yi ◽  
孙殷宏 Sun Yinhong ◽  
王珏 Wang Jue ◽  
常哲 Chang Zhe ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Beam Quality ◽  
Diffraction Limit ◽  
Narrow Linewidth ◽  
Linearly Polarized

Confocal Raman mapping

1992 ◽  
Vol 50 (2) ◽  
pp. 1514-1515
Author(s):  
J. Barbillat ◽  
M. Delhaye ◽  
P. Dhamelincourt
Keyword(s):  
Chemical Species ◽  
Diffraction Limit ◽  
Microscopic Level ◽  
Raman Mapping ◽  
Complete Spectrum ◽  
Laser Illumination ◽  
Ccd Detector ◽  
Raman Microprobe ◽  
Photodiode Array ◽  
Raman Image

Raman mapping, with a spatial resolution close to the diffraction limit, can help to reveal the distribution of chemical species at the surface of an heterogeneous sample.As early as 1975,three methods of sample laser illumination and detector configuration have been proposed to perform Raman mapping at the microscopic level (Fig. 1),:- Point illumination:The basic design of the instrument is a classical Raman microprobe equipped with a PM tube or either a linear photodiode array or a two-dimensional CCD detector. A laser beam is focused on a very small area ,close to the diffraction limit.In order to explore the whole surface of the sample,the specimen is moved sequentially beneath the microscope by means of a motorized XY stage. For each point analyzed, a complete spectrum is obtained from which spectral information of interest is extracted for Raman image reconstruction.- Line illuminationA narrow laser line is focused onto the sample either by a cylindrical lens or by a scanning device and is optically conjugated with the entrance slit of the stigmatic spectrograph.

Fiber laser pick-and-join tool for welding of thermoplastics

2006 ◽  
Author(s):  
Andrei Boglea ◽  
Luedger Bosse ◽  
Alexander Olowinsky ◽  
Silvia Bou
Keyword(s):  
Fiber Laser
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