The University of Arizona

Future Wei Technologies, Inc.

Weiyang Mo

Jiafeng Zhu

Daniel Kilper

John Wissinger

Jun He

Likun Lin

Saied Agahi

Houman Rastegarfar

Mariya A Bhopalwala

A method is provided for determining the gain spectrum of an optical amplifier such as an erbium doped optical amplifier (EDFA). In accordance with the method, an optical amplifier such as an EDFA that is to accommodate a specified number of channels at different optical wavelengths is provided. A subset of the specified number of channels at which gain is to be measured is selected. The number of channels in the subset is determined based at least in part on a number of samples required by the Nyquist sampling theorem to reconstruct the gain spectrum. A gain value for each channel in the selected subset of channels is measured for a probe signal that does not perturb the gain spectrum of the EDFA by more than a prescribed amount. The gain spectrum for the EDFA is constructed from the measured gain values.

Fast EDFA gain spectrum characterization using weak probe and fourier sampling

A proactive and non-obtrusive channel probing scheme is provided to accurately predict channel power, gain, and optical signal to noise ratio (OSNR) without disrupting the existing connections. In one example, using a probe signal with 5 &#x3bc;s pulse duration in a single-hop network, rapid wavelength switching is achieved with power excursions less than or equal to 0.2 dB for different loading configurations.

Proactive channel probing for wavelength switching in optical transmission systems

An embodiment method for managing connections on a communications network having an optical network portion includes receiving a request for a first connection at a controller in signal communication with one or more reconfigurable optical add-drop multiplexers (ROADMs) controlling an optical network portion of a communications network, wherein the controller is connected to the communications network. The controller determines a route on the communications network for the first connection according to conditions of the communications network, with the route comprising one or more first links of the optical network. The controller determines one or more first ROADMs controlling the one or more first links and sends commands from the controller to the one or more first ROADMs to allocate bandwidth on the one or more first links.

Agile resource on demand service provisioning in software defined optical networks

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Tucson, AZ, United States of America

Weiyang Mo