Please find attached a seminar from the Dept. of Physical Electronics for your information and distribution (if relevant). Thank you, Esther.
The seminar will take place on Thursday, December 4th, 2008
at 15:00, Room 206 at the Faculty of Engineering,
Wolfson Mechanical Eng. Buld.
* * * * * Dept. SEMINAR * * * * *
INCREASING THE SENSITIVITY OF OPTICAL SENSORS USING NEW INTERFEROMETER DESIGNS
Ph. D. student under the supervision of Prof. Shlomo Ruschin
This research deals with increasing the sensitivity of optical sensors using phase detection in optical interferometers. Three novel sensor structures are introduced based on different interferometers structures: a variable power splitting Mach-Zehnder interferometer, an integrated modal interferometer, and a hetero-modal interferometer using spectral interrogation. The last configuration includes the discovery of a new effect that enables the sensitivity to increase without theoretical bounds, being limited only by measurement considerations like noise and instabilities.
Theoretical analysis is conducted presenting analytic results supported by numerical examples. Results show an increase in sensor sensitivity compared to previously reported results - from 20% in the first structure to several orders of magnitude in the last one.