Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 46: Lasers I

Q 46.2: Talk

Thursday, March 14, 2024, 11:15–11:30, HS 3118

Two-cycle laser pulse at 1600 nm from a compact fiber-feedback OPO and OPA combination at 76 MHz repetition rate — •Johann Thannheimer, Abdullah Alabbadi, Tobias Steinle, and Harald Giessen — University of Stuttgart

Compact and powerful few-cycle sources between 1 µ m and 2 µ m are required to generate mid-infrared light for spectroscopy via intra-pulse difference frequency generation, as well as for ultrafast metrology via electro optic sampling. We demonstrate fiber-based compression down to two optical cycles (12 fs) at 1600 nm with an average power of 570 mW and a repetition rate of 76 MHz. We use an Yb-based pump laser for an optical parametric oscillator which is subsequently amplified to the watt scale using an optical parametric amplifier. The nonlinear frequency broadening and anomalous dispersion which is required for pulse compression, is realized by just coupling the light into a 42-mm-long common single mode fiber. FROG measurements confirm that our system realizes few cycle pulses based on an extremely compact, stable, and low-noise solid-state laser system.

Keywords: ultrafast; ultrashort; OPO; OPA