Nonlinear Micro-Processing of Silicon by Ultrafast Fiber Laser at 1552 nm

2011 ◽  
Vol 1365 ◽  
Author(s):  
Yoshiro Ito ◽  
Rie Tanabe ◽  
Kozo Tada
Keyword(s):  
Laser Radiation ◽  
Fiber Laser ◽  
Spectral Range ◽  
Near Infrared ◽  
Short Pulse ◽  
Crystal Oscillator ◽  
Linear Absorption ◽  
Frequency Adjustment ◽  
Non Linear ◽  
Short Pulse Lasers

ABSTRACTProcessing of transparent materials by non-linear absorption mechanisms induced by short pulse lasers has been applied in many fields. Silicon (Si) is widely used materials in microelectronics, MEMS and photonics. It is, however, not transparent for commonly used processing lasers in near infrared to ultraviolet spectral range and has not been a subject for the non-linear processing by lasers so far. In this paper, possibilities and capabilities of non-linear processing of Si by 900 fs, 1552nm laser radiation are described with special emphasis on application to frequency adjustment of a crystal oscillator in a package made from Si.

Photo-structural transformation of chalcogenide glasses under non-linear absorption of laser radiation

1997 ◽  
Vol 213-214 ◽  
pp. 330-335 ◽  
Author(s):  
A.V Belykh ◽  
O.M Efimov ◽  
L.B Glebov ◽  
Yu.A Matveev ◽  
A.M Mekryukov ◽  
...  
Keyword(s):  
Laser Radiation ◽  
Structural Transformation ◽  
Chalcogenide Glasses ◽  
Linear Absorption ◽  
Non Linear

scholarly journals DETERMINATION OF WORKING INTERVALS OF POWER DENSITY FOR LASER MARKING OF 50ChN STEEL

2015 ◽  
Vol 6 (1) ◽  
Author(s):  
Nikolay Angelov
Keyword(s):  
Laser Radiation ◽  
Visual Perception ◽  
Fiber Laser ◽  
Power Density ◽  
Near Infrared ◽  
Laser Marking ◽  
Theoretical Considerations

Studies relate to two basic methods of steel marking − by melting and by evaporation. Based on theoretical considerations, preliminary intervals of power density for laser marking of 50 ChN steel are determined. Experiments are carried out with fiber laser, operating in the near infrared area. Graphics on the dependence of contrast of marking from the power density of laser radiation for two methods of marking were developed. Working intervals of the power density for marking by melting and by evaporation for visual perception of marking and using the readers were defined.

scholarly journals Fiber laser front ends for high-energy short pulse lasers

2005 ◽  
Author(s):  
Jay W. Dawson ◽  
Zhi Liao ◽  
Scott Mitchell ◽  
Michael Messerly ◽  
Raymond Beach ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Short Pulse ◽  
High Energy ◽  
Short Pulse Lasers

scholarly journals Fiber Laser Front Ends for High Energy, Short Pulse Lasers

2007 ◽  
Author(s):  
Jay W. Dawson ◽  
Michael J. Messerly ◽  
Henry Phan ◽  
Craig W. Siders ◽  
Raymond J. Beach ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Short Pulse ◽  
High Energy ◽  
Short Pulse Lasers

Compact Energy Measuring System for Short Pulse Lasers

2013 ◽  
Vol 20 (2) ◽  
pp. 183-190 ◽  
Author(s):  
A. Barna ◽  
I. B. Földes ◽  
Z. Gingl ◽  
R. Mingesz
Keyword(s):  
Short Pulse ◽  
Electronic Devices ◽  
Laser Pulses ◽  
Measuring System ◽  
Electric Response ◽  
Usb Interface ◽  
Radiated Noise ◽  
Fiber Optical ◽  
Measurement Control ◽  
Short Pulse Lasers

Abstract In experiments with short-pulse lasers the measurement control of the energy of the laser pulse is of crucial importance. Generally it is difficult to measure the amplitude of the pulses of short-pulse lasers using electronic devices, their response time being longer than the duration of the laser pulses. The electric response of the detector is still too fast to be directly digitized therefore a peak-hold unit can be used to allow data processing for the computer. In this paper we present a device which measures the energy of UV short (fs) pulses shot-byshot, digitizes and sends the data to the PC across an USB interface. The circuit is based on an analog peak detect and hold unit and the use of fiber optical coupling between the PC and the device provides a significant improvement to eliminate potential ground loops and to reduce conductive and radiated noise as well. The full development is open source and has been made available to download from our web page (http://www.noise.inf.u-szeged.hu/Instruments/PeakHold/).

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