Ultra-fast ytterbium fiber laser operating at low repetition rate

摘要

We present a theoretical and experimental study on PM ultra-short fiber laser cavities operating at low repetition rate. The mode-locking operation in this study always relies on SEmicondutor Saturable Absorber Mirror (SESAM) and intra-cavity spectral filtering. Several experimental configurations have been tested and modeled. Repetition rates as low as 7.7 MHz with sub-picosecond pulse duration have been obtained. A longer cavity has also been modeled in order to determine if stable ultra-short pulsed operation would also possible at lower repetition rates.