Abstract: A method, apparatus and system for controlling power transients in a Raman-amplified optical transmission system includes, in response to the detection of a power transient in an optical signal, varying the gain of at least one dispersion compensating module (DCM) in the Raman-amplified optical transmission system to correct for a change in signal power caused by the power transient.

Abstract: A method, apparatus and system for controlling power transients in amplified optical transmission system includes, in response to the detection of a power transient in an optical signal, varying a gain of at least one amplifier to correct for a time delay in a gain response associated with a gain change in an amplifier. Alternatively, the method, apparatus and system further include in response to the detection of the power transient, adjusting the gain of at least one amplifier to correct for a change in signal power.

Abstract: Lasing of an optical channel at a particular wavelength is substantially prevented in an optical ring network by automatically verifying the presence of a break, e.g., termination, in the ring for an optical channel of a particular wavelength before allowing a node in the network to establish a “pass through” connection for that optical channel. More specifically, a node attempting to establish a “pass through” route for an optical channel received from another node is prevented from establishing the necessary connections to do so until it is confirmed that the optical channel of interest has been added to the ring or dropped from the ring at another node, thus indicating the presence of a “break” in the optical ring for that optical channel of interest.