Optical: systems and elements – Optical amplifier – Particular active medium
Reexamination Certificate
2008-07-31
2011-10-04
Bolda, Eric (Department: 3663)
Optical: systems and elements
Optical amplifier
Particular active medium
C372S050220
Reexamination Certificate
active
08031398
ABSTRACT:
The invention provides a device and a method for extending the bandwidth of short wavelength and long wavelength fiber optic lengths. The invention provides for an optical transmitter package device comprising: a laser diode; and a semiconductor optical amplifier connected directly after and in close proximity to the laser diode, wherein the semiconductor optical amplifier is adapted to operate in a frequency domain such that the semiconductor optical amplifier filters and reshapes optical wavelengths from the laser diode, and wherein the semiconductor optical amplifier is biased below an amplification threshold for the semiconductor optical amplifier. The device may also comprises a feedback circuit which comprises an optical splitter, wherein the feedback circuit samples reshaped optical output from the semiconductor optical amplifier and dynamically adjusts one or both of the semiconductor optical amplifier and the laser diode. In the case of a multimode fiber, the present invention provides the additional ability to provide a controlled offset launch into the fiber and the ability to control modal noise devoid of a specialized optical connector.
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PCT/EP2007/060247—Filed Sep. 27, 2007—PCT ISR/WO.
Atkins Robert G.
Bagheri Harry H.
DeCusatis Casimer M.
Bolda Eric
Gibb I.P.Law Firm, LLC
International Business Machines - Corporation
Li, Esq. Wenjie
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