Optical: systems and elements – Optical amplifier – Particular active medium
Patent
1992-05-08
1993-11-23
Lobo, Ian J.
Optical: systems and elements
Optical amplifier
Particular active medium
359237, G02F 135, H01S 310
Patent
active
052649601
ABSTRACT:
High bit rate optical wavelength shifters that are fully tunable within a bandwidth of interest are realized using a traveling wave semiconductor optical amplifier that impresses a representation of data modulated on an optical signal at a first wavelength onto an optical signal of weaker signal strength at a second, desired wavelength. The data representation is impressed on the second optical signal through use of the gain-saturation effect that occurs in the traveling wave semiconductor optical amplifier. The traveling wave (single pass) amplifier receives simultaneously the modulated optical signal at the first wavelength and the second optical signal at the desired wavelength. The first optical signal affects the gain of the traveling wave amplifier as seen by the second optical signal so as to impress a representation of variations in the envelope of the first optical signal onto the second optical signal.
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AT&T Bell Laboratories
De Blasi Gerard A.
Lobo Ian J.
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