A temperature tunable optical receiver comprising: - a temperature tunable wavelength filter to select a specific received optical wavelength channel; - at least two thermal actuators thermally coupled to the tunable wavelength filter , characterized by comprising at least a first thermal actuator and a second thermal actuator ; wherein the first thermal actuator is configured to maintain the temperature of the tunable optical receiver within a first defined temperature range; wherein the second thermal actuator is configured to maintain the temperature of the tunable wavelength filter at a second defined temperature range; wherein the temperature of the tunable wavelength filter , defined by the second thermal actuator , is different from the reference temperature of the tunable optical receiver defined by the first thermal actuator ; - at least a temperature sensor , which is configured to issue a sensing signal associated to the temperature of the tunable optical receiver; - at least an optical power sensor , which is configured to issue a sensing signal associated to the temperature of the tunable wavelength filter ; - a controller electrically coupled to the first thermal actuator , to the second thermal actuator , to the temperature sensor , and to the optical power sensor , being the controller configured to receive a wavelength channel signal by controlling the temperature of the tunable wavelength filter issuing a first driving signal to the first thermal actuator and a second driving signal to the second thermal actuator , in view of the feedback sensing signals from the optical power sensor , from the temperature sensor , and from a sampling of the power of the second thermal actuator ; wherein the controller is configured to maintain constant the sampling of power of the second thermal actuator . - a temperature tunable wavelength filter to select a specific received optical wavelength channel; - at least two thermal actuators thermally coupled to the tunable wavelength filter , characterized by comprising at least a first thermal actuator and a second thermal actuator ; wherein the first thermal actuator is configured to maintain the temperature of the tunable optical receiver within a first defined temperature range; wherein the second thermal actuator is configured to maintain the temperature of the tunable wavelength filter at a second defined temperature range; wherein the temperature of the tunable wavelength filter , defined by the second thermal actuator , is different from the reference temperature of the tunable optical receiver defined by the first thermal actuator ; - at least a temperature sensor , which is configured to issue a sensing signal associated to the temperature of the tunable optical receiver; - at least an optical power sensor , which is configured to issue a sensing signal associated to the temperature of the tunable wavelength filter ; - a controller electrically coupled to the first thermal actuator , to the second thermal actuator , to the temperature sensor , and to the optical power sensor , being the controller configured to receive a wavelength channel signal by controlling the temperature of the tunable wavelength filter issuing a first driving signal to the first thermal actuator and a second driving signal to the second thermal actuator , in view of the feedback sensing signals from the optical power sensor , from the temperature sensor , and from a sampling of the power of the second thermal actuator ; wherein the controller is configured to maintain constant the sampling of power of the second thermal actuator . <EOS>