A Reconfigurable All-Fiber Femtosecond Source With Low Jitter and Programmable Pulse Picking

We demonstrate a reconfigurable all-fiber femtosecond source with tunable repetition rates from 100 MHz to 1 GHz. The system establishes a rigid 1 GHz time grid via a dispersion-managed passive interleaver, followed by self-synchronized steep-edge electro-optic gating (rise time < 40 ps) to temporally decouple switching noise from the signal. This architecture achieves arbitrary pulse picking with single-pulse granularity while experimentally preserving the seed ’ s intrinsic stability. Hybrid phase noise measurements confirm an integrated RMS timing jitter below 10 fs [1 kHz – 1 MHz] and a 38.4 dB extinction ratio. This versatile platform provides oscillator-limited timing fidelity for arbitrary pulse patterns, offering a robust tool for precision-driven applications such as high-speed sampling systems and time-resolved biological imaging.