Download Special Seminar Presented by NATEA (North America Taiwanese Engineering &

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: [email protected] or
[email protected])
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 photonelectron 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