Wavelength selective switch (WSS) for shaping optical signals
AssigneeInfinera Corporation
InventorsOmer Faruk Yilmaz, Ankur Neog, Saurabh Kumar, Sanjeev Ramachandran
Life of this patent
Estimating the term…
Abstract
A device may perform a set of sample measurements of a set of slices of spectrum utilized by an input optical signal. The device may perform an analysis of the input optical signal to determine an attenuation profile. The analysis may include identifying a channel in a particular slice of spectrum, of the set of slices of spectrum, based on an optical power of a sample measurement, of the set of sample measurements, satisfying a threshold. The device may apply the attenuation profile to the input optical signal to generate an output optical signal with a particular spectral shape. The device may provide the output optical signal with the particular spectral shape.
Claims19
A method, comprising:
- performing, by a device, a set of sample measurements of an input optical signal,
- the input optical signal including a set of channels of a super-channel,
- the super-channel grouping the set of channels for routing as a single transport entity,
- the set of channels having a non-uniform spacing;
- performing, by the device, an analysis on the set of sample measurements of the input optical signal,
- the analysis including identifying a channel, of the set of channels, in a sample measurement, of the set of sample measurements, based on the set of sample measurements based on an optical power of one or more sample measurements, of the set of sample measurements;
- determining, by the device, a spectral profile for the input optical signal based on the analysis of the set of sample measurements of the input optical signal;
- determining, by the device, an attenuation profile for the input optical signal based on the spectral profile for the input optical signal and a particular spectral shape,
- the attenuation profile including an attenuation of the channel;
- and
- applying, by the device, the attenuation profile to the input optical signal to generate an output optical signal with the particular spectral shape.
An optical device, comprising:
- a spectral shaping device configured to:
- perform a set of sample measurements of a set of slices of spectrum utilized by an input optical signal;
- perform an analysis of the input optical signal to determine an attenuation profile,
- the analysis including identifying a channel in a particular slice of spectrum, of the set of slices of spectrum, based on an optical power of a sample measurement, of the set of sample measurements, satisfying a threshold;
- apply the attenuation profile to the input optical signal to generate an output optical signal with a particular spectral shape;
- and
- provide the output optical signal with the particular spectral shape.
An apparatus comprising:
- a wavelength selective switch (WSS) configured to:
- apply an attenuation profile to an input optical signal to generate an output optical signal,
- the input optical signal including a set of channels with a set of optical powers differing by at least a threshold quantity,
- the output optical signal being associated with the set of channels with the set of optical powers not differing by the threshold quantity, and
- transmit the output optical signal;
- an optical power monitor (OPM),
- the OPM being located downstream of the WSS in an optical transmission path,
- the OPM being configured to:
- perform a set of sample measurements of the output optical signal;
- a processor configured to:
- determine a spectral profile for the input optical signal based on the set of sample measurements of the output optical signal,
- generate the attenuation profile for the WSS based on the spectral profile, and
- provide the attenuation profile to the WSS for application to another input optical signal.
Dependencies are inferred from the claim text.