Systems and methods for clock generation and calibration in photonic systems

Abstract

The subject technology is directed to clock generation and calibration systems and methods. In an embodiment, the subject technology provides an apparatus that includes a first delay line configured to receive an input clock signal and generate a first clock signal by providing a first delay to the input clock signal. The apparatus further includes a second delay line configured to receive the input clock signal and generate a second clock signal by providing a second delay to the input clock signal. A phase detector is coupled to the first and second delay lines to determine a phase difference between the first and second clock signals. A comparator generates an output signal based on the phase difference, and a controller adjusts the first or second delay based on the output signal. The system enables precise phase alignment and skew calibration for clock signals. There are other embodiments as well.