Chun Zeng

Aug 31, 2023 | opg.optica.org | Chun Zeng |Xiaoming Wei |Yu ZHANG |Zhouming Feng

An ultrafine electro-optical frequency comb (EOFC) with plentiful combteeth is demonstrated. Adopting a single-frequency fiber laser as alight source, cascade phase modulation based on a sinusoidal signaland a frequency-time transformation (FTT) signal is executed togenerate the EOFC with high fineness. Meanwhile, a cyclic fastfrequency shifting strategy is introduced to boost the number of combteeth and the bandwidth of the EOFC.