Photonic component with an interference device , which has at least one input and at least one first and one second output, wherein the component comprises moreover: - a first grating coupler (GC1) which has a first and a second grating coupler output and is connected, by way of a grating coupler input, to the first output of the interference device , - a second grating coupler (GC2) which has a first and a second grating coupler output and is connected, by way of a grating coupler input, to the second output of the interference device , - a first photodetector (PD1), connected to the first grating coupler output of the first grating coupler (GC1), - a second photodetector (PD2), connected to the first grating coupler output of the second grating coupler (GC2), and - a control device , which is connected to the first and second photodetectors (PD1, PD2) and forms at least one control signal (ST1, ST2) for controlling the interference device on the basis of the photo signals (I1, 12) of the two photodetectors (PD1, PD2) or an evaluation signal formed with the photo signals (I1, I2), - wherein the first and second grating couplers (GC1, GC2) are arranged, in particular integrated, in the same chip plane (E) of a chip of the component , and - wherein, in the case of the first and second grating couplers (GC1, GC2), in each case the second grating coupler outputs form in each case a coupling path out of the chip plane (E), specifically at an angle between 70 and 110 degrees with respect to the chip plane (E), characterized in that at least one attenuating element is connected into the signal path (SP1) between the first output of the interference device and the first photodetector (PD1), or into the signal path (SP2) between the second output of the interference device and the second photodetector (PD2). - a first grating coupler (GC1) which has a first and a second grating coupler output and is connected, by way of a grating coupler input, to the first output of the interference device , - a second grating coupler (GC2) which has a first and a second grating coupler output and is connected, by way of a grating coupler input, to the second output of the interference device , - a first photodetector (PD1), connected to the first grating coupler output of the first grating coupler (GC1), - a second photodetector (PD2), connected to the first grating coupler output of the second grating coupler (GC2), and - a control device , which is connected to the first and second photodetectors (PD1, PD2) and forms at least one control signal (ST1, ST2) for controlling the interference device on the basis of the photo signals (I1, 12) of the two photodetectors (PD1, PD2) or an evaluation signal formed with the photo signals (I1, I2), - wherein the first and second grating couplers (GC1, GC2) are arranged, in particular integrated, in the same chip plane (E) of a chip of the component , and - wherein, in the case of the first and second grating couplers (GC1, GC2), in each case the second grating coupler outputs form in each case a coupling path out of the chip plane (E), specifically at an angle between 70 and 110 degrees with respect to the chip plane (E), <EOS>