Text Only Queen's U. Directory Contact: Queen's  |  Physics
 queensu.ca   physics.queensu.ca    


Home

............................................

  General Information

............................................
 
Contact Us

.....................................
 
Maps and Directions

.....................................
 
Colloquia and Talks

.....................................
 
Department News

.....................................
 
Employment

.....................................
 
Facilities

.....................................
 
IT Support

.....................................
 
About Queen's

.....................................
 
About Kingston

.....................................

Undergrad Studies

............................................

Graduate Studies

............................................

Research Groups

............................................

Faculty & Staff

............................................

Alumni & Friends

............................................

Visitors & Residents

............................................

Queen's Observatory

............................................

 
 Upcoming Talks        Past Talks        Calendar View

Departmental Colloquium


980nm Pump Laser Facet Passivation

Prof. Mike Xu. Ouyang
Ph.D., Chief engineer,
NanoOpto Co., Somerset, NJ

Time
 
Mon. October 21, 2002     10:30 AM     Room 401

Abstract
 

980 nm pump lasers are the engines of Erbium Doped Fiber Amplifier (EDFA). The challenges for 980nm, high power, constant wave (CW) laser are high optical power and long device lifetime (200,000 hours at 250-300 mW). Today, all commercial high power 980nm pump lasers are made from AlxGa1-xAs on GaAs substrates by MOCVD or MBE.

This talk will introduce semiconductor laser structure and applications. Failure mechanisms of the laser are classified into bulk defects induced and surface defects induced. The presentation will focus on surface state induced catastrophic optical facet damage (COFD). The surface states were generated after wafer cleaving and by instant facet oxidation. The commercial way to prevent COFD is the E2 passivation process invented by IBM, in which process, laser bars are cleaved in vacuum at 10-9 -10-10 Torr, and the facets are instantly coated with a thin Si film. However, slow throughput is the bottleneck for E2 process. At Corning, we have invented an ion beam facet cleaning and passivation technique. The process is suitable for mass production of 980 nm pump lasers. Using the process, laser life is garneted to over 100,000 hours. Other approaches to preventing COD will be discussed at the end of the talk.


Outline

Applications
980nm pump module
Motivation for facet passivation
Failure mechanisms
Passivation technologies
Ion beam work
Research trends

About the speaker

Mike Xu Ouyang, Ph.D. McMaster U. 1995, M.Engin. University of Electronic Sci. & Engin. of China UESTC, Chengdu, Chian), 1987, BA. UESTC, 1982.

Mike is working as a chief engineer at NanoOpto Co, NJ on Nano-optical devices for polarization beam splitter/combiner. Before joining NanoOpto, Mike worked 5 years as a senior research scientist at Corning Inc, Corning, NY on fundamental research of thin films for applications in photonics, flat panel displays, and environmental products. Mike's other jobs were CTO at Lite Array for a technology transfer of thin film electroluminescent display (TFEL) production to China, and a senior research scientist at Luxell Technology, Toronto, where Mike developed a first commercial sunlight legible TFEL display. Mike's research interests are thin films, surface & interface, flat panel displays and photonic components for optical telecommunication. Mike has 6 patents and 13 papers published.

Professor Mike Ouyang is a candidate for the ATOP-funded Assistant Professor position in the Department.


Refreshments will be served in the lounge after the talk.

List of upcoming talks and colloquia

Calendar for the current month



  Back to top
©2013 Department of Physics, Engineering Physics & Astronomy
Queen's University
Kingston, Ontario
K7L 3N6 Canada
Web Inquiries
webmaster@physics.queensu.ca
Departmental Inquiries
dept@physics.queensu.ca