Method and Tuning Device for Tuning a Tunable Optical Transmitter to a Predetermined Target Wavelength

摘要

A method for tuning a tunable optical transmitter to a target wavelength includes applying at least one tuning signal to the tunable optical transmitter to control the tunable optical transmitter to create an optical calibration signal according to nominal tuning information for the tunable optical transmitter. The optical calibration signal has a wavelength lying within a secure wavelength range, and the nominal tuning information is based on a nominal wavelength dependency for the tunable optical transmitter. The method also includes measuring a deviation between an actual wavelength dependency of the tunable optical transmitter and the nominal wavelength dependency, and determining calibration information based on that deviation. The calibration information is applied to determine a corrected nominal wavelength dependency from which target tuning information is determined. The tunable optical transmitter is controlled to create an optical channel signal according to the target tuning information.

主权项

1. A method for tuning a tunable optical transmitter to a target wavelength, the tunable optical transmitter being included in a plurality of optical transmitters connected to a first end of an optical WDM transmission link, the method comprising:
(a) supplying at least one tuning signal to the tunable optical transmitter to control the tunable optical transmitter to create an optical calibration signal according to nominal tuning information comprising at least one parameter of the at least one tuning signal, wherein
(i) the optical calibration signal has a wavelength lying within a secure wavelength range which excludes any optical channel wavelength range predefined for transmitting an optical channel signal by another one of the plurality of optical transmitters in the direction of the optical calibration signal over the WDM transmission link, and(ii) the nominal tuning information is determined from a known nominal wavelength dependency characterizing the wavelength dependency of the tunable optical transmitter on the at least one parameter of the at least one tuning signal; (b) determining calibration information by directly or indirectly measuring, within the secure wavelength range, a deviation between an actual wavelength dependency of the tunable optical transmitter and the nominal wavelength dependency; and (c) controlling the tunable optical transmitter to create an optical channel signal according to target tuning information which is determined from a corrected nominal wavelength dependency corrected with respect to the nominal wavelength dependency based on the calibration information, the optical channel signal having a wavelength within a predetermined acceptable tolerance to the target wavelength.