Progress in the frequency control technology of erbium-doped fiber femtosecond optical comb in the National Time Center of the Chinese Academy of Sciences

The femtosecond optical comb and its application research group of the National Time Service Center of the Chinese Academy of Sciences have made new progress in the research of erbium-doped fiber femtosecond optical comb frequency control technology, and realized wide-band (MHz-level) large-scale frequency control by a single control method. This technology can simplify the structural design and increase the reliability of the optical comb while ensuring the high performance of the optical comb.

The research team used an electro-optical crystal designed by itself to control the polarization state of the laser, and realized the large-scale optical comb frequency control by means of the birefringence effect of the entire optical cavity. This technology can achieve at least an order of magnitude higher frequency control range than other technologies under wideband frequency control conditions, effectively solving the problem of not being able to simultaneously achieve high bandwidth and large range of femtosecond optical comb frequency control under a single means.

The relevant research results were published in the 24th issue of Optics Letters, and the technical achievements have been applied for invention patents. The research was funded by the National Natural Science Foundation of China, the Chinese Academy of Sciences' first action “100-person plan”, strategic pilot science and technology project, scientific research equipment development project, and “Western Light” talent training introduction plan.




Comparison of optical comb frequency control bandwidth and control range of various technologies

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