Data processing of an optical network element

1. A method for data processing of an optical network element,

(a) wherein a configuration information is received at the optical network element and a light signal is adjusted to a wavelength or wavelength range indicated by said configuration information;

(b) wherein an incoming optical signal is demodulated via the light signal and mixed as an electrical demodulated signal with a signal of an oscillator;

(c) wherein the signal of the oscillator is tuned to improve a reception of the incoming signal at the optical network element;

(d) wherein the light signal is used for upstream modulation to provide a modulated optical upstream signal.

2. The method according to claim 1 , wherein the light signal is provided by a light source, in particular a laser.

3. The method according to claim 1 , wherein the signal of the oscillator is tuned to substantially compensate the adjustment of the light signal in step (a).

4. The method according to claim 1 ,

wherein prior to step (a) the signal of the oscillator is set to a predefined or arbitrary frequency and a modulator of the optical network element is disabled;

wherein the light signal is adjusted to improve reception of the incoming signal and to receive the configuration information.

5. The method according to claim 4 , wherein after step (b) or after step (c) the modulator is activated.

6. The method according to claim 1 , wherein the bandwidth of the upstream optical signal is lower than the bandwidth of the incoming optical signal.

7. The method according to claim 1 , wherein the configuration information is provided by a central unit, in particular an optical line termination.

8. The method according to claim 1 , wherein the light signal used for upstream modulation is adjusted to a wavelength or wavelength range indicated by said configuration information by improving a signal quality, in particular by reducing a signal-to-noise ratio.

9. The method according to claim 1 , wherein the optical network element is an optical network unit or a subscriber unit of an optical network, in particular a passive optical network.

10. A device

comprising a light source providing a light signal;

comprising a receiver to which the light signal is fed, wherein the receiver provides an electrical output signal;

wherein the light source is adjustable to a wavelength or wavelength range provided by a configuration information received;

comprising an oscillator and a mixer, wherein a signal of the oscillator and the electrical output signal from the receiver are conveyed to the mixer and wherein the signal of the oscillator is tunable to improve a reception of the incoming signal at the device;

comprising a modulator to which the light signal of the light source is fed to provide a modulated optical upstream signal.

11. The device according to claim 10 , wherein said device is an optical network element, in particular associated with an optical network unit or a subscriber unit.

12. The device according to claim 10 , wherein the signal of the oscillator is tunable to improve a quality, in particular a signal-to-noise ratio of an output signal of the mixer.

13. A communication system comprising at least one device according to claim 10 .