Single-short-cavity dual-comb fiber laser with over 120 kHz repetition rate difference based on polarization multiplexing

An all-fiber single-short-cavity dual-comb laser with a high repetition rate of up to 500 MHz and a high repetition rate difference of over 120 kHz was demonstrated. The laser setup exploits high birefringence of a polarization-maintaining gain fiber to generate asynchronous combs based on the polarization-multiplexing method. By adopting short-linear cavity and all-birefringent configuration, a repetition rate difference several orders of magnitude larger than that of a previous work was achieved. The soliton dual-comb showed good mutual coherence and stability, which reveals the potential to enhance the acquisition rate and accuracy of dual-comb measurement systems. \(c) 2023 Optica Publishing Group

Automated summary

An all-fiber dual-comb laser with a high repetition rate and repetition rate difference was demonstrated in this study. The laser generates asynchronous combs based on the high birefringence of the fiber and achieves a larger repetition rate difference compared to previous work. This laser exhibits good stability and coherence, which has the potential to enhance the acquisition rate and accuracy of dual-comb measurement systems.