Packet Timescale Wavelength Switching Enabled by Regression Optimisation

A linear regression algorithm is applied to a digital-supermode distributed Bragg reflector laser to optimise wavelength switching times. The algorithm uses the output of a digital coherent receiver as feedback to update the pre-emphasis weights applied to the laser section currents. This permits in...

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Bibliographic Details
Published inIEEE photonics technology letters Vol. 32; no. 8; pp. 477 - 480
Main Authors Gerard, Thomas, Dzieciol, Hubert, Benjamin, Joshua, Clark, Kari, Williams, Hugh, Thomsen, Benn, Lavery, Domanic, Bayvel, Polina
Format Journal Article
LanguageEnglish
Published New York IEEE 15.04.2020
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Algorithms
Channels
Frequency measurement
Gratings
Laser tuning
Lasers
Measurement by laser beam
Optical switches
Optimization
optimization methods
Switching
wavelength routing
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Summary:A linear regression algorithm is applied to a digital-supermode distributed Bragg reflector laser to optimise wavelength switching times. The algorithm uses the output of a digital coherent receiver as feedback to update the pre-emphasis weights applied to the laser section currents. This permits in-situ calculation without manual weight adjustments. The application of this optimiser to a representative subsection of channels indicates this commercially available laser can rapidly reconfigure over 6.05 THz, supporting 122 channels, in less than 10 ns.
ISSN:1041-1135
1941-0174
DOI:10.1109/LPT.2020.2980746