Lucent Technologies Inc.

Agere Systems Guardian Corp.

Aydin Yeniay

Jean-Marc P Delavaux

A technique for suppressing stimulated Brillouin scattering SBS along an optical fiber signal path utilizes polarization modulation at the transmitter to split the launched power into orthogonal polarization states. By reducing the power along each polarization, SBS will be reduced. Linewidth broadening of the optical source is achieved by introducing: (1) a incoherence between the polarization states (using a time delay along the signal path of one polarization state); and (2) a frequency shift between the polarization states (using an acousto-optic modulator along the signal path of the remaining polarization state).

Optical fiber transmission system with polarization multiplexing to reduce stimulated brillouin scattering

A high power optical amplifier with a multiple-tap output includes a preamplifier stage (such as an EDFA), followed by a power amplifier comprises a concatenated set of co-doped optical amplifier stages. Each amplifier stage includes a tap/power extractor for removing a portion of the amplified input signal, allowing for the pump signal(s) and remaining amplified input signal to be applied as an input to the following stage.

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Bethlehem, PA, United States of America

Aydin Yeniay