Multiplying the Repetition Frequency of Optical Frequency Comb Signals Based on the Talbot Effect

This research topic is based on the time-domain self-imaging effect (Talbot effect) and uses all-fiber technology to achieve an increasement in the time-domain repetition frequency of optical frequency comb signals outside the laser cavity. A 10 GHz signal source is generated from a 250 MHz laser signal without affecting the shape and duration of original individual pulses. It can avoid the limitations of some traditional methods and prepare for the subsequent increasement of the frequency difference between the comb teeth of an optical frequency comb from megahertz to the gigahertz level, while maintaining a high signal-to-noise ratio.