Demetris L Geddis, Ph.D

Thursday, February 16, 2006 at 6:30 PM

Location: Topeka’s Steakhouse ‘N Saloon
55 Town Center Way 757.896.9696
Hampton, VA 23666

Tunable lasers have applications in many different fields. The most notable applications are included in the fields of optical communications, spectroscopy, and optical fiber sensing. In optical communications, tunable lasers are important for dense wavelength division multiplexing (DWDM) systems. In addition, the narrow line width coupled with the ability to be rapidly tuned over a wide range make tunable fiber lasers attractive in the field of spectroscopy and optical fiber sensing. These high-speed lasers allow for fast component and material characterization. Moreover, rapidly tunable fiber lasers can play an important role in real-time health monitoring of structures such as bridges and skyscrapers, and in aerospace vehicles. In this research Macro Fiber Composite (MFC) piezoelectric actuators developed at the NASA Langley Research Center was used to tune a fiber ring laser. The MFC actuator is made of cost-competitive materials, and is economical, durable, and has increased actuation efficiency. The micro strain per volt ranges from 0.5 to 1.2. Because of the MFC’s design in which rectangular piezofibers are sandwiched between adhesives and electroded polyimide film, the MFC actuator is very flexible. This flexibility allowed for the sandwiching of an FBG filter between two MFC actuators.

Biographical Sketch: Dr. Demetris L. Geddis received his B.S. degree in electrical engineering from Hampton University, M.S. ECE and Ph.D. degrees in electrical and computer engineering from Georgia Institute of Technology. He has extensive research experience in the areas of integrated optoelectronics, optics, microelectronics, and electromagnetics. He has worked as a Research and Design engineer at Motorola and Bell laboratories. Current research interests and publications are in the areas of photonics, optoelectronics, microelectronics, heterogeneous thin film integration, and single-fiber bi-directional communications. Proof. Geddis joined Norfolk State University faculty as an Assistant Professor of Optical Engineering in 2004. He is a member of IEEE Lasers and Electro-Optic Society.

Checks:

Checks should be made out to IEEE and brought to the meeting.

Directions (Printable version)

From Norfolk:

Take the HAMPTON RDS CENTER PKWY WEST exit- exit number 261A. 0.3 miles
Merge onto HAMPTON ROADS CENTER PKWY. 0.5 miles
Turn RIGHT onto VA-600 N/BIG BETHEL RD. 0.1 miles
Turn RIGHT onto TOWNE CENTRE WAY. <0.1 miles
End at 55 TOWN CENTER WAY HAMPTON VA

From Williamsburg:

Take the HAMPTON RDS CENTER PKWY WEST exit- exit number 261A. 0.2 miles
Merge onto HAMPTON ROADS CENTER PKWY. 0.2 miles
Turn RIGHT onto VA-600 N/BIG BETHEL RD. 0.1 miles
Turn RIGHT onto TOWNE CENTRE WAY. <0.1 miles
End at 55 TOWN CENTER WAY HAMPTON VA

Personalized directions from Yahoo

Agenda

• 6:00 PM Executive Committee Meeting
• 6:30 PM Social Period
• 7:00 PM Dinner
• 8:00 PM Technical Presentation

Meal Costs

• Members & Guests: $20.00
• Students$10.00
• There is no charge to attend the presentation.