Optical waveguides – Directional optical modulation within an optical waveguide
Reexamination Certificate
2007-09-28
2010-06-08
Doan, Jennifer (Department: 2874)
Optical waveguides
Directional optical modulation within an optical waveguide
C385S001000, C385S002000, C385S003000, C385S015000, C385S024000
Reexamination Certificate
active
07734121
ABSTRACT:
A bidirectional optical module having a device1for emitting transmitting signal light, an optical fiber8which the transmitting signal light from the device enters, a light-receiving device9which light from the optical fiber enters, and a wavelength splitting filter4. The transmitting signal light emitted from the device is sent forward through the optical fiber, and the receiving signal light is received through the optical fiber. The bidirectional optical module has an optical device (optical isolator) of a reflection polarizer6bonded to an end face of the optical fiber, a Faraday rotator5disposed integrally on the reflection polarizer and an absorption polarizer3disposed on an optical path extending between the device and the filter. The reflection polarizer has a wavelength dependency which functions as a polarizer for the transmitting signal light, but does not function as a polarizer for the receiving signal light.
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Iida Junji
Okami Hideharu
Uemura Mikio
Watanabe Akio
Doan Jennifer
Kratz Quintos & Hanson, LLP
Sumitomo Metal & Mining Co., Ltd.
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