Electro-optic comb pumped optical parametric oscillator with flexible repetition rate at GHz level

We present a gigahertz (GHz)-repetition-rate optical parametric oscillator (OPO) pumped by an electro-optic comb at 1.03 µm, delivering sub-picosecond signal pulses across 1.5–1.7 µm from MgO-doped periodically poled L mathvariant="normal">i mathvariant="normal">N mathvariant="normal">b mathvariant="normal">O 3 crystal. Using pump power of 5 W 14.2 GHz repetition rate, 378 mW is obtained 1.52 subharmonic cavity, corresponding to extraction efficiency 7.6%. By cascading Mach–Zehnder modulator, the pulse rate can be divided any integer number one 14, allowing OPO operate with flexible 1 GHz. A strategy leading quasi-continuous tunability also discussed.