Special Seminar - Dr. Sami Hendow, Monday May 14, 6:30PM, GCC (Please RSVP, Pizza will be served)

Chia-Ming Chang cachang at stanford.edu
Sun Apr 29 10:55:17 PDT 2012










Special Seminar Presented by NATEA (North America Taiwanese Engineering & Science Association) and the Stanford Optical Society 

Micromachining with Nanosecond and Femtosecond Pulsed Lasers 

Dr. Sami Hendow 

Date : Monday, May 14, 6:30 PM 
Venue : Graduate Community Center (750 Escondido Road, Stanford, CA 94305) 
Agenda : 
6:30 - 7:00 PM: Registration and Social Networking (Pizza will be served) 
7:00 - 8:15 PM: Presentation including Q&A 
Fee : 
Free for members of NATEA and the Stanford Optical Society with RSVP 
$5.00 for non-members with RSVP 
$10 for all without RSVP 
RSVP: http://goo.gl/dXPht (contact: borchyuan at gmail.com or cachang at stanford.edu) 
Please RSVP prior to May 13 (Pizza will be served) 

Abstract 
Laser-material interactions using pulses that are nsec in durations or longer are dominated by thermal time constants. Ultrashort pulses, on the other hand, undergo a much faster photon-electron energy transfer where pulse energy is deposited at a rate much faster than the material's thermal time constant. We will show examples of micromachining of metal, silicon and ceramics using nsec pulses, and outline the effects of change of peak power, pulse energy and pulse width. We will also extend this discussion to oxide formation on the surface, as well as bursting where pulses are broken into short but rapidly deposited pulses. These effects will be contrasted when the micromachining operation is performed using psec and fsec ultrafast pulses. 

About the speaker 
Sami Hendow is an independent consultant. Recently, he was with Multiwave Photonics as Sr. Director responsible for Engineering and Application Development. Prior to that he was Engineering Program Manager with Spectra-Physics developing solid state and fiber amplified lasers. Before that, he was Sr. Scientist at Northrop Grumman working on the qualification of fiber lasers and power scaling by coherent beam combining of fiber laser arrays. Over the last 25 years, he has developed several products and has published about sixty articles and patents related to lasers and photonics technologies. Sami has a PhD in Optical Sciences from the University of Arizona. He is Chair of 2013 Fiber Lasers Conference, SPIE Photonics West, and member of conference program committees of the SPIE's Laser Applications in Microelectronic and Optoelectronic Manufacturing, and LIA's Laser Microprocessing Conference, ICALEO. 



http://photons.stanford.edu 





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