Optics: measuring and testing – By polarized light examination
Reexamination Certificate
2005-09-20
2005-09-20
Smith, Zandra V. (Department: 2877)
Optics: measuring and testing
By polarized light examination
C356S073100, C385S012000
Reexamination Certificate
active
06947139
ABSTRACT:
A simultaneous optical isolation and channel monitoring system for monitoring a channel of an incident light is provided. The system includes an optical isolator for receiving an incident light so as to isolate an interference of backward light into the cavity of laser source or an optical amplifier, wherein after passing through the optical isolator, the incident light has a different polarization state output changing with a wavelength thereof, a beam splitter connected to the optical isolator for separating the light into a light to output and a light for monitoring signal, a linear polarizer connected to the beam splitter for filtering a quantity of signal from the monitored light, and a photodetector connected to the linear polarizer for detecting the quantity of signal generated from the monitored light so as to monitor the channel.
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Lee San-Liang
Yang Chun-Liang
National Taiwan University of Science and Technology
Smith Zandra V.
Valentin, II Juan D.
Volpe and Koenig P.C.
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