Optical Repetition Rate Locking of Ultrafast SESAM-Based Yb-Doped All-Fiber Oscillator for High Intensity OPCPA Systems

We demonstrate all-fiber ultrafast SESAM-based optically repetition rate locked oscillator concept designed for high intensity OPCPA systems. Pump induced refractive index change in the active erbium fiber for precise delay line was tested with 976 nm and 1550 nm wavelength pump. The measured jitter at the output of the system was around 1 ps.