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IEEE
Photonics Society |
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Exceptional Talk 2010 Series
“Optical
isolator: Application to photonic integrated circuits”
Professor Tetsuya MIZUMOTO
Graduate School of Science and
Engineering, Tokyo Institute of Technology
2-12-1 Ookayama, Meguro-ku, Tokyo,
152-8552 Japan
E-mail: tmizumot@pe.titech.ac.jp
Tuesday, May 18th, 2010 @ 6:30pm
Location: Southern Methodist University (SMU)
Room: Junkins 113
Address: 6251 Airline Rd, Dallas,
TX 75205
Click here for directions to SMU
(Download a printable version of the directions and
parking information)
Abstract
Optical active devices fail to operate in a
pre-determined manner, when unwanted reflections are launched into them. An
optical isolator plays an essential role in protecting optical devices from
unwanted reflections. Commercially available optical isolators based on a
magneto-optic Faraday effect, which are provided with optical fiber and optical
beam interfaces, are hard to be integrated with other optical devices.
In case of waveguide isolators, it is quite unrealizable
to use a rotation of polarization, because the precise control of waveguide
birefringence is needed. Several approaches have been developed to avoid the
precise control of waveguide geometry, like a nonreciprocal radiation and a
nonreciprocal loss isolator. An interferometric waveguide isolator, which uses
a nonreciprocal phase shift provided by the first-order magneto-optic effect,
has the advantages of a single polarization operation and a wide operational
wavelength range. Also, the interferometric isolator is realizable in several
waveguide platforms by using a magneto-optic material in a cladding layer. To
achieve this, we developed a direct bonding technique of magneto-optic garnet
on III-V compound semiconductors and silicon waveguides. In this talk, the
integration of optical isolators will be addressed, which includes a
non-magneto-optic approach.
Presentation of the Keynote Address
Biography
Tetsuya
Mizumoto received the B.E., M.E., and D.Eng. degrees in electrical engineering
from Tokyo Institute of Technology, Tokyo, Japan, in 1979, 1981, and 1984,
respectively.
Since 1984, he has been a
Research Associate at Tokyo Institute of Technology. Currently, he is a
Professor with Graduate School of Science and Engineering, Tokyo Institute of
Technology. His research has been concerned mainly with waveguide optical
devices, especially magneto-optic devices and all-optical switching devices
based on the third-order nonlinearity.
Dr.
Mizumoto received the Treatise Award in 1994 and the Best Letter Award of
Electronics Society Transactions in 2007 from the Institute of Electronics,
Information and Communication Engineers (IEICE). He is a Fellow of IEICE, a
member of the IEEE, the Japan Society of Applied Physics (JSAP), and the
Magnetic Society of Japan (MSJ). He is awarded an IEEE Photonics Society
distinguished lecturer award in July, 2009.