Data processing in an optical network

1. A method for data processing in an optical network,

wherein two sets of wavelengths are allocated;

wherein at least one set of wavelengths is monitored;

wherein a collision between the two sets of wavelengths is avoided or compensated by adjusting at least one laser of an optical component; and

wherein a downstream laser signal of the optical component is mixed with an upstream light of at least one adjacent optical component to produce a mixed signal and wherein a collision detection signal is determined by the optical component based on this mixed signal.

2. The method according to claim 1 , wherein the optical component is or is associated with one of the following:

an optical line terminal (OLT);

an optical network unit (ONU);

an optical transmission group, (OTG).

3. The method according to claim 1 , wherein each set of wavelengths is associated with one laser of an optical component, in particular with an optical transmission group (OTG).

4. The method according to claim 1 , wherein the collision is avoided or compensated by determining an optical gap between the at least two sets of wavelengths and by adjusting at least one laser of an optical component when the optical gap reaches a predetermined threshold.

5. The method according to claim 1 , wherein downstream laser signals of several optical components are mixed to a collision detection signal.

6. The method according to claim 5 , wherein said collision detection signal is fed to a centralized collision detection device.

7. The method according to claim 6 , wherein several centralized collision detection devices are provided in parallel.

8. The method according to claim 1 , wherein an optical network unit scans downstream signals of several sets of wavelengths and determines a collision detection signal.

9. A method for data processing in an optical network,

wherein two sets of wavelengths are allocated;

wherein at least one set of wavelengths is monitored;

wherein a collision between the two sets of wavelengths is avoided or compensated by adjusting at least one laser of an optical component;

wherein the optical network unit determines a distance between two adjacent wavelengths of a set of wavelengths and a distance between two sets of wavelengths and determines a collision if the distance between the two sets of wavelengths is less than the distance between two adjacent wavelengths of the set of wavelengths.

10. The method according to claim 9 , wherein the optical network unit transmits the collision detection signal upstream to an optical access point, in particular to an optical line termination.

11. A method for data processing in an optical network,

wherein two sets of wavelengths are allocated;

wherein at least one set of wavelengths is monitored;

wherein a collision between the two sets of wavelengths is avoided or compensated by adjusting at least one laser of an optical component;

wherein a downstream laser signal of the optical component is mixed with a downstream light of at least one adjacent optical component to produce a mixed signal and wherein a collision detection signal is determined by the optical component based on this mixed signal.

12. The method according to claim 1 ,

wherein the two sets of wavelengths comprise a first set of wavelengths that is associated with a first laser and a second set of wavelengths that is associated with a second laser;

wherein the second set of wavelengths is tuned via the second laser towards the first set of wavelengths.

13. An optical component comprising

a local oscillator laser emitting a set of wavelengths;

the laser emitting a downstream laser signal

a photodiode in which the downstream laser signal is mixed with an upstream signal from an adjacent optical component to produce a mixed signal;

a processing unit that is arranged for monitoring the set of wavelengths;

for adjusting the local oscillator laser in case the set of wavelengths collides or is about to collide with another set of wavelengths; and

for determining a collision detection signal based on the mixed signal.

14. An optical communication system comprising at least one optical component according to claim 13 .