OPTOELEKTRONISCHES BAUELEMENT UND LIDAR-SYSTEM

The invention relates to an optoelectronic component for a LiDAR system, comprising a photonic integrated circuit (10). The photonic integrated circuit (10) further comprises a microresonator (11) which is configured as an external resonator for an optical gain medium (30) and to provide a frequency-modulated optical transmission field (Tx). A waveguide (12) is optically coupled to an output side of the microresonator (11). A coherent in-line balanced detector (13) comprises an electrical output, as well as a first optical connection side, which is coupled to the waveguide (12) to receive the transmission field (Tx), and a second optical connection side, which is configured to receive a frequency-modulated optical reflection field (Rx). The coherent in-line balanced detector (13) is further configured to interferometrically superimpose the transmission field (Tx) and the reflection field (Rx) in a symmetrical receiver structure (18) and to provide an electronic combination signal (Dx) at the output. A combination of an optical gain medium (30) and a microresonator (11) forms an external cavity laser which yields a small linewidth and high isolation. With a counter-propagating coherent in-line balanced detector, a very compact system is formed in which isolators and circulators can be dispensed with. This can be integrated into a photonic integrated circuit (PIC). The optical gain medium (30) comprises a gain chip, for example. Multiple channels may be formed, each comprising a waveguide (12) and a detector (13). When the channels are controlled in succession, a 1D scan is implemented for the LiDAR system.