Optical waveguides – Directional optical modulation within an optical waveguide – Acousto-optic
Reexamination Certificate
2007-02-20
2007-02-20
Pak, Sung (Department: 2874)
Optical waveguides
Directional optical modulation within an optical waveguide
Acousto-optic
C398S082000, C398S195000
Reexamination Certificate
active
11213955
ABSTRACT:
A radio-frequency-signal generator generates an RF signal. An optical monitor monitors a first intensity of a reference signal and a second intensity of a drop signal. A reference-frequency determining unit determines, based on the first intensity, a first frequency of an RF signal that causes the AOTF to output the reference signal. A temperature detecting unit detects a temperature of the AOTF. A frequency calculating unit calculates a second frequency of an RF signal that causes the AOTF to output a drop signal of a desired wavelength. A control unit controls the RF-signal generator to generate the RF signal of the second frequency calculated.
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Ito Hiroyasu
Kai Yutaka
Miyata Hideyuki
Noguchi Masaji
Ueno Tomohiro
Fujitsu Limited
Pak Sung
Staas & Halsey , LLP
Young Tina M.
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