Fast temperature tuning for optical receivers

A temperature tunable optical receiver comprising:

• a temperature tunable wavelength filter (1) to select a specific received optical wavelength channel;
• at least two thermal actuators thermally coupled to the tunable wavelength filter (1), characterized by comprising at least a first thermal actuator (2) and a second thermal actuator (3);
• wherein the first thermal actuator (2) is configured to maintain the temperature of the tunable optical receiver within a first defined temperature range;
• wherein the second thermal actuator (3) is configured to maintain the temperature of the tunable wavelength filter (1) at a second defined temperature range;
• wherein the temperature of the tunable wavelength filter (1), defined by the second thermal actuator (3), is different from the reference temperature of the tunable optical receiver defined by the first thermal actuator (2);
• at least a temperature sensor (4), which is configured to issue a sensing signal associated to the global temperature of the tunable optical receiver;
• at least an optical power sensor (9), which is configured to issue a sensing signal associated to the temperature of the tunable wavelength filter (1);
• a controller (5) electrically coupled to the first thermal actuator (2), to the second thermal actuator (3), to the temperature sensor (4), and to the optical power sensor (9), being the controller (5) configured to receive a wavelength channel signal by controlling the temperature of the tunable wavelength filter (1) issuing a first driving signal (6) to the first thermal actuator (2) and a second driving signal (7) to the second thermal actuator (3), in view of the feedback sensing signals from the optical power sensor (9), from the temperature sensor (4), and from a sampling of the power of the second thermal actuator (11);
• wherein the sampling of power of the second thermal actuator (11) is maintained constant by the controller (5).